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PTH05010W - PTH05010W
PTH05010W -5-V Input
15-A, Input Non-Isolated Wide-Output Adjust Power Module
SLTS204C 2003 REVISED DECEMBER 2003
15-A Output Current Input Voltage Wide-Output Voltage Adjust (0.8 Efficiencies Power Density On/Off Inhibit Output Voltage Sense Pre-Bias Startup Margin Up/Down Controls Auto-TrackSequencing Under-Voltage Lockout Output Over-Current Protection (Non-Latching, Auto-Reset) Operating Temp: Safety Agency Approvals: 1950, 22.2 950, EN60950 (Pending) Point-of-Load Alliance (POLA) Compatible
NOMINAL SIZE
1.37 0.62 (34,8 15,75
Description
PTH05010 series non-isolated power modules small size performance flexibility. Their high output current, compact footprint, industry-leading features offers system designers versatile module powering complex multi-processor digital systems. series employs double-sided surface mount construction provides highperformance step-down power conversion output current from input voltage. output voltage PTH05010W value over range, using single resistor. This series includes Auto-TrackTM. Auto-Track simplifies task supply voltage sequencing power system enabling modules track each other, external voltage, during power power down. Other operating features include on/off inhibit, output voltage adjust (trim), margin up/down controls. ensure tight load regulation, output voltage sense also provided. non-latching over-current trip serves load fault protection. Target applications include complex multi-voltage, multi-processor systems that incorporate industry's high-speed DSPs, micro-processors drivers.
Configuration
Function
Inhibit Adjust Sense Vout Track Margin Down Margin
Denotes negative logic: Open Normal operation Ground Function active
Track Auto- Sequ
Standard Application
Track Margin Down Margin
Rset Required output voltage value higher than (See spec. table values) Required capacitor Cout Optional capactitor
PTH05010 (Top View)
Inhibit RSET (Required)
Sense
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(Required)
COUT (Optional)
PTH05010W -5-V Input
15-A, Input Non-Isolated Wide-Output Adjust Power Module
SLTS204C 2003 REVISED DECEMBER 2003
Ordering Information Output Voltage (PTH05010Hxx)
Code Voltage (Adjust)
Package Options (PTH05010xHH)
Code Description Horiz. SMD, Standard Ref. (EUH) (EUJ)
Notes: part number tape reel packages only. Reference applicable package reference drawing dimensions board layout "Standard" option specifies 63/37, Sn/Pb solder material.
Descriptions
Vin: positive input voltage power node module, which referenced common GND. Vout: regulated positive power output with respect node. GND: This common ground connection Vout power connections. also reference control inputs. Inhibit: Inhibit open-collector/drain negative logic input that referenced GND. Applying lowlevel ground signal this input disables module's output turns output voltage. When Inhibit control active, input current drawn regulator significantly reduced. Inhibit left open-circuit, module will produce output whenever valid input source applied. Adjust: resistor must directly connected between this (GND) output voltage value higher than temperature stability resistor should ppm/°C better). setpoint range output voltage from resistor required given output voltage calculated from following formula. left open circuit, output voltage will default lowest value. further information output voltage adjustment consult related application note. Rset Vout 2.49 Sense: sense input allows regulation circuit compensate voltage drop between module load. optimal voltage accuracy Sense should connected Vout. also left disconnected. Track: This analog control input that enables output voltage follow external voltage. This becomes active typically after input voltage been applied, allows direct control output voltage from nominal set-point voltage. Within this range output will follow voltage Track volt-for-volt basis. When control voltage raised above this range, module regulates set-point voltage. feature allows output voltage rise simultaneously with other modules powered from same input bus. unused, this input should connected Vin. Note: under-voltage lockout feature, output module cannot follow input voltage during power more information, consult related application note. Margin Down: When this input asserted GND, output voltage decreased from nominal. input requires open-collector (open-drain) interface. compatible. lower percent change accomodated with series resistor. further information, consult related application note. Margin When this input asserted GND, output voltage increased input requires open-collector (open-drain) interface. compatible. percent change reduced with series resistor. further information, consult related application note.
specification table gives preferred resistor values number standard output voltages.
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PTH05010 -5-V Input
15-A, Input Non-Isolated Wide-Output Adjust Power Module
SLTS204C 2003 REVISED DECEMBER 2003
Environmental Absolute Maximum Ratings
Characteristics Track Input Voltage Operating emperature Range Solder Reflow Temperature Storage emperature Mechanical Shock Mechanical Vibration Weight Flammability Symbols Vtrack Treflow
(Voltages with respect GND) -0.3 Units grams
Conditions Over Range Surface temperature module body pins Mil-STD-883D, Method 2002.3 msec, Sine, mounted Mil-STD-883D, Method 2007.2 Suffix 20-2000 Suffix Meets 94V-O
Notes: During reflow package version elevate peak temperature module, pins internal components above stated maximum.
Specifications
Characteristics Output Current
(Unless otherwise stated, =3.3 =470 =Iomax)
PTH05010W
Symbols Regtemp Regline Regload Regtot Conditions Over range Over range Over range Includes set-point, line, load, RSET RSET 2.21 RSET 5.49 RSET 8.87 RSET 17.4 RSET 36.5 bandwidth Reset, followed auto-recovery A/µs load step, Iomax, Cout =330 Recovery Time over/undershoot Cout Cout(max) increasing decreasing Referenced Inhibit (pin GND, Track (pin open Over ranges non-ceramic ceramic Equiv. series resistance (non-ceramic) Bellcore TR-332 stress, ground benign Capacitance value airflow natural convection -0.5 -0.2 ±0.5 27.5 -130 -130 4.45 Open 8,250
Units
Input Voltage Range Set-Point Voltage olerance Temperature Variation Line Regulation Load Regulation Total Output Variation Efficiency
Ripple (pk-pk) Over-Current Threshold Transient Response
trip margin margin track dVtrack/dt UVLO inhibit Cout
mVpp µSec V/ms
Margin Up/Down Adjust Margin Input Current (pins /10) Track Input Current (pin Track Slew Rate Capability Under-Voltage Lockout Inhibit Control (pin3) Input High Voltage Input Voltage Input Current Input Standby Current Switching Frequency External Input Capacitance External Output Capacitance
Reliability
MTBF
Notes: curves consult factory appropriate derating. set-point voltage tolerance affected tolerance stability ofRSET. stated limit unconditionally RSET tolerance with ppm/°C better temperature stability. small low-leakage (<100 MOSFET recommended control this pin. open-circuit voltage less than Vdc. This control internal pull-up input voltage Vin. left open-circuit module will operate when input power applied. small low-leakage (<100 MOSFET recommended control. further information, consult related application note. electrolytic input capacitor required proper operation. capacitor must rated minimum ripple current. external output capacitor required basic operation. Adding distributed capacitance load will improve transient response. This calculated maximum. minimum limitation will often result lower value. Consult application notes further guidance. This typical electrolytic (non-ceramic) ouput capacitance. minimum when using max-ESR values calculate.
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PTH05010W -5-V Input
15-A, Input Non-Isolated Wide-Output Adjust Power Module
Typical Characteristics
SLTS204C 2003 REVISED DECEMBER 2003
Characteristic Data;
Efficiency Load Current
(See Note
Safe Operating Area;
Output Voltage =3.3
(See Note
Ambient Temperature (°C)
VOUT
Airflow 400LFM 200LFM 100LFM Conv
Efficiency
Iout Amps
Iout
Output Ripple Load Current
Output Voltage
VOUT
Ambient Temperature (°C)
Airflow 400LFM 200LFM 100LFM Conv
Ripple
Iout Amps
Iout
Power Dissipation Load Current
Watts
Iout Amps
Note Characteristic data been developed from actual products tested 25°C. This data considered typical data Converter. Note curves represent conditions which internal components below manufacturer's maximum operating temperatures. Derating limits apply modules soldered directly 4-layer with copper.
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Application Notes
PTH03010W PTH05010W
Capacitor Recommendations PTH03010 PTH05010 Series Power Modules
Input Capacitor recommended input capacitor(s) determined minimum capacitance mArms minimum ripple current rating. Ripple current, less than equivalent series resistance (ESR), temperature major considerations when selecting input capacitors. Unlike polymer tantalum, regular tantalum capacitors have recommended minimum voltage rating (maximum voltage ripple). This standard practice ensure reliability. improved ripple reduction input bus, ceramic capacitors used complement electrolytic types achieve minimum required capacitance. Output Capacitors (Optional) applications with load transients (sudden changes load current), regulator response will benefit from external output capacitance. recommended output capacitance will allow module meet transient response specification (see product data sheet). most applications, high quality computer-grade aluminum electrolytic capacitor adequate. These capacitors provide decoupling over frequency range, kHz, suitable ambient temperatures above operation below tantalum, ceramic Os-Con type capacitors recommended. When using more non-ceramic capacitors, calculated equivalent should lower than using manufacturer's maximum single capacitor). list preferred low-ESR type capacitors identified Table 1-1. Ceramic Capacitors Above performance aluminum electrolytic capacitors becomes less effective. further improve reflected input ripple current output transient response, multilayer ceramic capacitors also added. Ceramic capacitors have very their resonant frequency higher than bandwidth regulator. When used output their combined critical long total value ceramic capacitance does exceed Also, prevent formation local resonances, place more than five identical ceramic capacitors parallel with values greater. Tantalum Capacitors Tantalum type capacitors used both input output, recommended applications where ambient operating temperature less than TPS, Sprague 593D/594/595 Kemet T495/ T510 capacitor series suggested over many other tantalum types their higher rated surge, power dissipation, ripple current capability. caution many general purpose tantalum capacitors have considerably higher ESR, reduced power dissipation lower ripple current capability. These capacitors also less reliable they have lower power dissipation surge current ratings. Tantalum capacitors that have stated surge current rating recommended power applications. When specifying Os-Con polymer tantalum capacitors output, minimum limit will encountered well before maximum capacitance value reached. Capacitor Table Table identifies characteristics capacitors from number vendors with acceptable ripple current (rms) ratings. recommended number capacitors required both input output buses identified each capacitor type. This extensive capacitor list. Capacitors from other vendors available with comparable specifications. Those listed guidance. ripple current rating kHz) critical parameters necessary insure both optimum regulator performance long capacitor life. Designing Very Fast Load Transients transient response DC/DC converter been characterized using load transient with di/dt A/µs. typical voltage deviation this load transient given data sheet specification table using optional value output capacitance. di/dt transient increased, response converter's regulation circuit ultimately depends output capacitor decoupling network. This inherent limitation with DC/DC converter once speed transient exceeds bandwidth capability. target application specifies higher di/dt lower voltage deviation, requirement only with additional output capacitor decoupling. these cases special attention must paid type, value capacitors selected. transient performance requirements exceed that specified data sheet, total amount load capacitance above 3,000 selection output capacitors becomes more important. further guidance consult separate application note, "Selecting Output Capacitors Products High-Performance Applications."
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Application Notes
PTH03010W PTH05010W
Table 1-1: Input/Output Capacitors
Capacitor Vendor, Type/ Series (Style)
Capacitor Characteristics
Quantity
Working Voltage Panasonic, Aluminum (Radial) (SMD) United Chemi-con PXA, Poly-Aluminum (SMD) Poly-Aluminum (Radial) Os-con (Radial) LXZ, Aluminum (Radial) Nichicon, Aluminum (SMD) (Radiall) (Radial) Panasonic, Poly-Aluminum: (SMD) S/SE (SMD) Sanyo Os-con (Radial) SVP, Os-con (SMD) TPE, Poscap (SMD)
Value (µF)
Max. 0.090 0.090 0080 0.020 0.012 0.015 0.090 0.150÷2 0.090 1030
Max. Ripple Current (Irms) 4130 5300 4735 1030
Physical Size (mm)
Input
Output
Vendor Part Number
EEUFC1A561 EEUFC1C471 EEVFK1E471P PXA6.3VC471MJ80TP 10PS470MJ12 10FX680M LXZ16VB471M10X12LL UWG1A471MNR1GS UPM1C 471MPH6 UHD1C471MPR
0.017 0.005 0.015 0.013 0.018 0.045 0.060 0.040 0.015
4500 4000 4500 5200 3500 1723 1826 1800 >3800
7.3L 4.3W 1210 case 3225 1210 case 3225
EEFWA1A471P EEFSE0J181R 10SP470M 10SVP560M 6TPE470MI TPSE477M010R0045 TPSV477M010R0060 T520X337M010AS T530X337M010AS
Tantalum SMD) Kemet, Poly-Tantalum T520, (SMD) T530. (SMD) Vishay-Sprague 595D, Tantalum (SMD) 94SP Poly-Aluminum (Radial) 94SVP Poly-Aluminum SMD) Kemet, Ceramic (SMD) Murata, Ceramic (SMD)
0.100 0.015 0.017 0.002 0.002
1440 4510 3960
595D477X0010R2T 94SP477X0010FBP 94SVP477X06R3E12 C1210C106M4PAC C1210C476K9PAC GRM32ER60J107M GRM32ER60J476M GRM32ER61C226K GRM32DR61C106K C3225X5R0J107MT C3225X5R0J476MT C3225X5R1C226MT C3225X5R1C106MT
TDK, Ceramic (SMD)
0.002
1210 case 3225
ceramic capacitor used complement electrolytic types input further reduce high-frequency ripple current.
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Application Notes
PTH03010W PTH05010W
Adjusting Output Voltage PTH03010W PTH05010W Wide-Output Adjust Power Modules
Adjust control (pin sets output voltage PTH03010W PTH05010W products. adjustment range PT03010W (3.3-V input) from PTH05010W (5-V input) from adjustment method requires addition single external resistor, Rset, that must connected directly between Adjust pins Table gives preferred value external resistor number standard voltages, along with actual output voltage that this resistance value provides. other output voltages value required resistor either calculated using following formula, simply selected from range values given Table 2-2. Figure shows placement required resistor. Rset Vout 2.49
Table 2-2; Output Voltage Set-Point Resistor Values
Req'd 0.800 0.825 0.850 0.875 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 1.125 1.150 1.175 1.200 1.225 1.250 1.275 1.300 1.325 1.350 1.375 1.400 1.425 1.450 1.475 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 Rset Open 77.5 61.5 50.8 43.2 37.5 33.1 29.5 26.6 24.2 22.1 20.4 18.8 17.5 16.3 15.3 14.4 13.5 12.7 12.1 11.4 10.8 10.3 9.82 9.36 8.94 8.18 7.51 6.92 5.93 5.51 5.13 4.78 4.47 Req'd 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 3.55 3.60 Rset 4.18 3.91 3.66 3.44 3.22 3.03 2.84 2.67 2.51 2.36 2.22 2.08 1.95 1.83 1.72 1.61 1.51 1.41 1.32 1.23 1.15 1.07
Table 2-1; Preferred Values Rset Standard Output Voltages
Vout (Standard) Rset (Pref'd Value) 2.21 4.12 5.49 8.87 17.4 36.5 Open Vout (Actual) 3.309V 2.502 2.010 1.803 1.504 1.202 1.005
Figure 2-1; Adjust Resistor Placement
Sense [Note Sense
PTH05010W
VOUT
VOUT
Notes: Modules that operate from 3.3-V input should adjusted higher than resistor. tolerance should with temperature stability ppm/°C better). Place resistor close regulator possible. Connect resistor directly between pins using dedicated traces. Never connect capacitors from Adjust either Vout. capacitance added Adjust will affect stability regulator.
RSET
COUT 330µF
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Application Notes
Series Wide-Output Adjust Power Modules (3.3/5-V Input)
Features Family Non-Isolated Wide Output Adjust Power Modules
Point-of-Load Alliance
family non-isolated, wide-output adjust power modules from Texas Instruments optimized applications that require flexible, high performance module that small size. These products part "Point-of-Load Alliance" (POLA), which ensures compatible footprint, interoperability true second sourcing customer design flexibility. POLA collaboration between Texas Instruments, Artesyn Technologies, Astec Power offer customers advanced non-isolated modules that provide same functionality form factor. Product series covered alliance includes PTHxx050W PTHxx060W PTHxx010W (15/12 PTHxx020W (22/18 PTHxx030W (30/26 From basic, "Just Plug functionality modules, 30-A rated feature-rich PTHxx030W, these products were designed very flexible, simple use. features vary with each product. Table provides quick reference available features product input voltage.
Table 3-1; Operating Features Series Input Voltage
output current, PTHxx020W PTHxx030W products incorporate over-temperature shutdown protection. products referenced Table include AutoTrackTM. This feature unique family, specifically designed simplify task sequencing supply voltage power system. These other features described following sections.
Soft-Start Power
Auto-Track feature allows power-up multiple modules directly controlled from Track pin. However stand-alone configuration, when Auto-Track feature being used, Track should directly connected input voltage, (see Figure 3-1).
Figure
Track
Sense
PTH05020W
Adjust
Inhibit
1,000
SET,
Thermal Shutdown
Margin Up/Down
Pre-Bias Startup
Output Sense
On/Off Inhibit
Auto-Track
Over-Current
Adjust (Trim)
Series PTHxx050
Input
PTHxx060
PTHxx010
PTHxx020
PTHxx030
When Track connected input voltage Auto-Track function permanently disengaged. This allows module power entirely under control internal soft-start circuitry. When power under soft-start control, output voltage rises set-point quicker more linear rate.
Figure
V/Div)
Vout V/Div)
simple point-of-use applications, PTHxx050W provides operating features such on/off inhibit, output voltage trim, pre-bias startup (3.3/5-V input only), over-current protection. PTHxx060W PTHxx010W (15/12 include output voltage sense, margin up/down controls. Then higher
HORIZ SCALE: ms/Div
A/Div)
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Application Notes
Series Wide-Output Adjust Power Modules (3.3/5-V Input)
From moment valid input voltage applied, soft-start control introduces short time delay (typically ms-10 before allowing output voltage rise. output then progressively rises module's setpoint voltage. Figure shows soft-start power-up characteristic 22-A output product (PTH05020W), operating from input configured 3.3-V output. waveforms were measured with resistive load, with Auto-Track disabled. initial rise input current when input voltage first starts rise charge current drawn input capacitors. Power-up complete within
power modules function normally when Inhibit left open-circuit, providing regulated output whenever valid source voltage connected with respect GND. Figure shows typical application inhibit function. Note discrete transistor (Q1). Inhibit control internal pull-up potential. input compatible with logic devices. opencollector open-drain) discrete transistor recommended control.
Figure
Sense
Over-Current Protection
protection against load faults, modules incorporate output over-current protection. Applying load that exceeds regulator's over-current threshold will cause regulated output shut down. Following shutdown module will periodically attempt recover initiating soft-start power-up. This described "hiccup" mode operation, whereby module continues cycle successive shutdown power until load fault removed. During this period, average current flowing into fault significantly reduced. Once fault removed, module automatically recovers returns normal operation.
PTH05020W
VOUT
1,000 =Inhibit
RSET BSS138
COUT
Over-Temperature Protection
PTHxx020 PTHxx030 series products have over-temperature protection. These products have on-board temperature sensor that protects module's internal circuitry against excessively high temperatures. rise internal temperature result drop airflow, high ambient temperature. internal temperature exceeds threshold, module's Inhibit control automatically pulled low. This turns output off. output voltage will drop external output capacitors discharged load circuit. recovery automatic, begins with soft-start power occurs when sensed temperature decreases about below trip point. Note: over-temperature protection last resort mechanism prevent thermal stress regulator. Operation close thermal shutdown temperature recommended will reduce long-term reliability module. Always operate regulator within specified Safe Operating Area (SOA) limits worst-case conditions ambient temperature airflow.
Turning applies voltage Inhibit control disables output module. then turned off, module will execute soft-start power-up. regulated output voltage produced within msec. Figure shows typical rise both output voltage input current, following turn-off turn corresponds rise waveform, Vds. waveforms were measured with load.
Figure
(2V/Div)
(2A/Div)
Output On/Off Inhibit
applications requiring output voltage on/off control, each series family incorporates output Inhibit control pin. inhibit feature used wherever there requirement output voltage from regulator turned off.
Q1Vds (5V/Div)
HORIZ SCALE: 10ms/Div
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Application Notes
Series Wide-Output Adjust Power Modules (3.3/5-V Input)
Auto-TrackFunction
Auto-Track function unique family, available with "Point-of-Load Alliance" (POLA) products. Auto-Track designed simplify amount circuitry required make output voltage from each module power power down sequence. sequencing more supply voltages during power common requirement complex mixed-signal applications, that dual-voltage VLSI such DSPs, micro-processors, ASICs. other modules, respective set-point voltage. Figure shows output voltage waveforms from circuit Figure after On/Off Control from high low-level voltage. waveforms, represent output voltages from power modules, (3.3 (1.8 respectively. shown rising together produce desired simultaneous power-up characteristic. same circuit also provides power-down sequence. Power down reverse power accomplished lowering track control voltage back zero volts. important constraint that valid input voltage must maintained until power down complete. also requires that turned relatively slowly. This that Track control voltage does fall faster than Auto-Track's slew rate capability, which V/ms. components Figure limit rate which pull down Track control voltage. values k-ohm correlate decay rate about 0.17 V/ms. power-down sequence initiated with low-to-high transition On/Off Control input circuit. Figure shows power-down waveforms. Track control voltage falls below nominal set-point voltage each power module, then output voltage decays with other modules under Auto-Track control.
Auto-Track Works
Auto-Track works forcing module's output voltage follow voltage presented Track control pin. This control range limited between module's set-point voltage. Once track-pin voltage raised above set-point voltage, module's output remains set-point example, Track 2.5-V regulator regulated output will voltage Track rises regulated output will higher than When under track control, regulated output from module follows voltage Track voltfor-volt basis. connecting Track number these modules together, output voltages will follow common signal during power-up power-down. control signal externally generated master ramp waveform, output voltage from another power supply circuit convenience Track control incorporates internal charge circuit. This operates module's input voltage provide suitable rising voltage ramp waveform.
Notes Auto-TrackTrack voltage must allowed rise above module's set-point voltage before module regulate adjusted set-point voltage. Auto-Track function will track almost voltage ramp during power compatible with ramp speeds V/ms. absolute maximum voltage that applied Track Vin. module will follow voltage Track control input until completed soft-start initialization. This takes about from time that module sensed that valid voltage been applied input. During this period, recommended that Track held ground potential. module capable both sinking sourcing current when following voltage Track pin. Therefore startup into output prebias supported during Auto-Track control. Note: pre-bias holdoff necessary when supply voltages rise simultaneously under control Auto-Track. Auto-Track function disabled connecting Track input voltage (Vin). With Auto-Track disabled, output voltage will rise quicker more linear rate after input power applied.
Typical Application
basic implementation Auto-Track allows simultaneous voltage sequencing number AutoTrack compliant modules. Connecting Track control pins more modules forces Track control modules follow same collective ramp waveform, allows them controlled through single transistor switch; Figure 3-5. initiate power-up sequence Track control must first pulled ground potential. This should done before input power applied modules, then held least thereafter. This brief period gives modules time complete their internal soft-start initialization, which enables them produce output voltage. Applying logic-level high signal circuit's On/Off Control turns applies ground signal Track control. After completing their internal soft-start intialization, output modules will remain zero volts while after valid input voltage been applied modules, turned off. This allows track control voltage automatically rise toward modules' input voltage. During this period output voltage each module will rise unison with
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Application Notes
Series Wide-Output Adjust Power Modules (3.3/5-V Input)
Figure 3-5; Sequenced Power Power Down Using Auto-Track
Track
Inhibit
PTH05020W
=3.3
On/Off Control Power Down Power BSS138 Inhibit Track
PTH05010W
5k49
=1.8
Figure 3-6; Simultaneous Power with Auto-Track Control
Figure 3-7; Simultaneous Power Down with Auto-Track Control
V/Div)
V/Div)
On/Off Input V/Div)
HORIZ SCALE: ms/Div
HORIZ SCALE: ms/Div
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V/Div) V/Div) On/Off Input V/Div)
Application Notes
Series Wide-Output Adjust Power Modules (3.3/5-V Input)
Margin Up/Down Controls
PTHxx060W, PTHxx010W, PTHxx020W, PTHxx030W products incorporate Margin Margin Down control inputs. These controls allow output voltage momentarily adjusted either down, nominal This provides convenient method dynamically testing operation load circuit over supply margin range. also used verify function supply voltage supervisors. change applied adjusted output voltage, external resistor, Rset Adjust pin. adjustment made pulling appropriate margin control input directly terminal low-leakage open-drain device, such n-channel MOSFET p-channel JFET recommended this purpose Adjustments less than also accommodated adding series resistors control inputs. value resistor selected from Table 3-2, calculated using following formula.
Notes: Margin Margin controls were intended activated simultaneously. they their affects output voltage completely cancel, resulting possibility slightly higher error output voltage point. ground reference should direct connection module (pin PTHxx050). This will produce more accurate adjustment load circuit terminals. transistors should located close regulator. Margin Margin control inputs compatible with devices that source voltage. This includes logic. These analog inputs should only controlled with true open-drain device (preferably discrete MOSFET transistor). device selected should have off-state leakage current. Each input sources when grounded, open-circuit voltage
Up/Down Adjust Resistance Calculation
reduce margin adjustment something less than series resistors required (See Figure 3-8). same amount adjustment, resistor value calculated will same. formulas follows. 99.8
Table 3-2; Margin Up/Down Resistor Values
Adjust 24.9 66.5 150.0 397.0
Where desired amount margin adjust percent.
Figure 3-8; Margin Up/Down Application Schematic
PTH05010W (Top View)
+VOUT
MargDn
RSET Cout
MargUp
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Application Notes
Series Wide-Output Adjust Power Modules (3.3/5-V Input)
Pre-Bias Startup Capability
Only selected products family incorporate this capability. Consult Table identify which products compliant. pre-bias startup condition occurs result external voltage being present output power module prior output becoming active. This often occurs complex digital systems when current from another power source backfed through dual-supply logic component, such FPGA ASIC. Another path might clamp diodes part dual-supply power-up sequencing arrangement. prebias cause problems with power modules that incorporate synchronous rectifiers. This because under most operating conditions, these types modules sink well source output current. family power modules incorporate synchronous rectifiers, will sink current during startup whenever Inhibit held low. However, ensure satisfactory operation this function, certain conditions must maintained. Figure shows application demonstrating pre-bias startup capability. startup waveforms shown Figure 3-10. Note that output current from PTH03010W (Io) shows negligible current until output voltage rises above that backfed through diodes Note: pre-bias start-up feature compatible with Auto-Track. When module under Auto-Track control, will sink current output voltage below that back-feeding source. ensure pre-bias hold-off approaches must followed when input power applied module. Auto-Track function must either disabled module's output held (for least using Inhibit pin. Either approach ensures that Track voltage above set-point voltage start
Notes Startup includes short delay (approx. prior output voltage rising, followed rise output voltage under module's internal soft-start control. Startup complete when output voltage risen either set-point voltage voltage Track pin, whichever lowest. ensure that regulator does sink current when power first applied (even with ground signal applied Inhibit control pin), input voltage must always greater than output voltage throughout power-up power-down sequence. Auto-Track function disabled power immediately applying voltage module's Track that greater than set-point voltage. This easily accomplished connecting Track Vin.
Figure 3-10; Pre-Bias Startup Waveforms
V/Div) V/Div)
A/Div)
HORIZ SCALE: ms/Div
Figure 3-9; Application Circuit Demonstrating Pre-Bias Startup
Track
Sense Vadj 2k21
Inhibit
PTH03010W
VCORE VCCIO
ASIC
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Application Notes
Series Wide-Output Adjust Power Modules (3.3/5-V Input)
Remote Sense
PTHxx060W, PTHxx010W, PTHxx020W, PTHxx030W products incorporate output voltage sense pin, Sense. Sense should connected Vout load circuit (see data sheet standard application). remote sense improves load regulation performance module allowing compensate `IR' voltage drop between itself load. drop caused high output current flowing through small amount trace resistance. remote sense optional. used, Sense left open-circuit. internal lowvalue resistor (15- less) connected between Sense Vout. This ensures output voltage remains regulation. With sense connected, difference between voltage measured directly between Vout pins, that measured from Sense GND, amount drop being compensated regulator. This should limited maximum Note: remote sense feature designed compensate forward drop non-linear frequency dependent components that placed series with converter output. Examples include OR-ing diodes, filter inductors, ferrite beads, fuses. When these components enclosed remote sense connection they effectively placed inside regulation control loop, which adversely affect stability regulator.
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PACKAGE OPTION ADDENDUM
www.ti.com
19-Aug-2008
PACKAGING INFORMATION
Orderable Device PTH05010WAD PTH05010WAH PTH05010WAS PTH05010WAST PTH05010WAZ PTH05010WAZT
Status ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
Package Type
Package Drawing
Pins Package Plan Pb-Free (RoHS) Pb-Free (RoHS) Pb-Free (RoHS) Pb-Free (RoHS)
Lead/Ball Finish Call Call Call Call Call Call
Peak Temp Type Type Level-1-235C-UNLIM/ Level-3-260C-168HRS Level-1-235C-UNLIM/ Level-3-260C-168HRS Level-3-260C-168 Level-3-260C-168
marketing status values defined follows: ACTIVE: Product device recommended designs. LIFEBUY: announced that device will discontinued, lifetime-buy period effect. NRND: recommended designs. Device production support existing customers, does recommend using this part design. PREVIEW: Device been announced production. Samples available. OBSOLETE: discontinued production device.
Plan planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), Green (RoHS Sb/Br) please check latest availability information additional product content details. TBD: Pb-Free/Green conversion plan been defined. Pb-Free (RoHS): TI's terms "Lead-Free" "Pb-Free" mean semiconductor products that compatible with current RoHS requirements substances, including requirement that lead exceed 0.1% weight homogeneous materials. Where designed soldered high temperatures, Pb-Free products suitable specified lead-free processes. Pb-Free (RoHS Exempt): This component RoHS exemption either lead-based flip-chip solder bumps used between package, lead-based adhesive used between leadframe. component otherwise considered Pb-Free (RoHS compatible) defined above. Green (RoHS Sb/Br): defines "Green" mean Pb-Free (RoHS compatible), free Bromine (Br) Antimony (Sb) based flame retardants exceed 0.1% weight homogeneous material)
MSL, Peak Temp. Moisture Sensitivity Level rating according JEDEC industry standard classifications, peak solder temperature. Important Information Disclaimer:The information provided this page represents TI's knowledge belief date that provided. bases knowledge belief information provided third parties, makes representation warranty accuracy such information. Efforts underway better integrate information from third parties. taken continues take reasonable steps provide representative accurate information have conducted destructive testing chemical analysis incoming materials chemicals. suppliers consider certain information proprietary, thus numbers other limited information available release. event shall TI's liability arising such information exceed total purchase price part(s) issue this document sold Customer annual basis.
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