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FAN4603 600mA, Fully Integrated Buck Power Supply Module
August 2010
FAN4603 600mA, Fully Integrated, Buck Power Supply Module
Solder Play DC/DC Converter; External Components Required Efficiency 600mA Output Current Capability 2.3V 5.5V Input Voltage Range Fixed Output Voltages from 1.0V 1.8V 35µA Quiescent Current Best-in-Class Load Line Transient Response Voltage Accuracy External Components Required High-Efficiency, Low-Ripple, Light-Load Thermal Shutdown (TSD), Under-Voltage Lockout, (UVLO), Short-Circuit (SCP) Protection 2.5mm Package Maximum Height: 1.1mm
Description
FAN4603 fully integrated synchronous DC/DC buck converter that provides 600mA output current over input voltage ranging from 2.3V 5.5V. provides fixed output voltage level ranging from 1.0V 1.8V. Other voltage options available request. FAN4603 converter offered ultra-miniature "Solder Play" solution that requires external components able achieve accuracy output ripple less than 12mV. Total footprint 2.5mm with maximum height 1.1mm. used small battery-powered devices applications with distributed requirements. moderate light loads, pulse frequency modulation used operate device power-save mode with typical quiescent current 35µA. Even with such quiescent current, part exhibits excellent transient response during large load swings. higher loads, system automatically switches fixed-frequency control. shutdown mode, supply current drops below 2µA, reducing power consumption.
Applications
Distributed DC-DC Module Applications Small Form Factor, Battery-Powered Applications Core Power FPGA, DSP, CPU, with Fast-Transient, Wide Dynamic Load Requirements Wireless Cards, Meters, Hearing Aids, Bluetooth Headsets, Equipment, VOIP, PDAs, MIDs, Netbooks, Servers
Ordering Information
Part Number
FAN4603MM18X FAN4603MM15X FAN4603MM13X FAN4603MM12X FAN4603MM10X
Output Voltage
1.82V 1.5V 1.3V 1.23V 1.0V
Package
Temperature Range
Packing
6-Lead Molded Leadless Package (MLP),
85°C
Tape Reel
Note: Other voltage options available request. Contact Fairchild representative.
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1 www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Typical Application
Figure Typical Application
Configuration
Figure (Top View)
Figure Package View
Definitions
Name
VOUT
Description
Input Voltage. Connect input power source Enable. device shutdown mode when voltage this <0.4V enabled when >1.2V. leave this floating. Switching Node. Leave this floating. Output Voltage. Connect Load. Feedback/VOUT. This must shorted directly VOUT (Pin Ground. Power ground. signals referenced this pin. Optional Ground Connection. typically used.
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Absolute Maximum Ratings
Stresses exceeding absolute maximum ratings damage device. device function operable above recommended operating conditions stressing parts these levels recommended. addition, extended exposure stresses above recommended operating conditions affect device reliability. absolute maximum ratings stress ratings only.
Symbol
TSTG
Parameter
Input Voltage with Respect Voltage Other with Respect Junction Temperature Storage Temperature Lead Temperature (Soldering, Seconds) Electrostatic Discharge Capability Human Body Model JESD22-A114 Charged Device Model, JESD22-C101
Min.
-0.3 -0.3
Max.
+150 +150 +260
Units
Recommended Operating Conditions
Recommended Operating Conditions table defines conditions actual device operation. Recommended operating conditions specified ensure optimal performance datasheet specifications. Fairchild does recommend exceeding them designing Absolute Maximum Ratings.
Symbol
IOUT Supply Voltage Range Output Current
Parameter
Min.
Max.
+125
Units
Operating Ambient Temperature Operating Junction Temperature
Thermal Properties
Symbol
Parameter
Junction-to-Ambient Thermal Resistance
Typical
Units
°C/W
Note: Junction-to-ambient thermal resistance function application board layout. This data measured with twolayer 2s0p board accordance JESD51- JEDEC standard. Special attention must paid exceed junction temperature TJ(max) given ambient temperature
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Electrical Specifications
Unless otherwise noted, 5.5V, VIN. -40°C +85°C, using circuit Figure Typical values 3.6VIN, 25°C.
Symbol
Power Supplies VUVLO VUVHYST VENH VENL VEN_HYS Oscillator fOSC Regulation
Parameter
Quiescent Current Shutdown Supply Current Under-Voltage Lockout Threshold Under-Voltage Lockout Hysteresis Enable HIGH-Level Input Voltage Enable LOW-Level Input Voltage Enable Logic Input Hysteresis Enable Input Leakage Current
Conditions
Min.
Typ.
Max.
2.25
Units
3.6V, Rising
2.15 1.05
0.01 1.00
Oscillator Frequency(3)
Mode
1.82V
ILOAD 600mA Mode ILOAD 600mA Mode ILOAD 600mA Mode ILOAD 600mA Mode ILOAD 600mA Mode Rising VOUT Regulation
1.784 1.784 1.470 1.470 1.274 1.274 1.207 1.207 0.975 0.975
1.820 1.820 1.500 1.500 1.300 1.300 1.233 1.233 1.000 1.000
1.890 1.856 1.560 1.530 1.352 1.326 1.283 1.260 1.050 1.025
1.50V
Output Voltage Accuracy
1.30V
1.23V
1.00V Protection ILIM TTSD THYS Peak Input Current Limit Thermal Shutdown Thermal Shutdown Hysteresis Soft-Start Time
1050 +150
1250
Note: frequency lower than specified when limited tON-min (minimum on-time) tOFF_min (minimum off-time), duty cycle extremes, output regulation maintained.
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Typical Performance
Unless otherwise specified, 3.7V, 25°C,VIN
100% VIN=3.7V
100%
1.82VOUT 1.5VOUT
VIN=5V
1.3VOUT 1.23VOUT
Efficiency
Efficiency
1.0VOUT
1.82VOUT 1.5VOUT 1.3VOUT
1.23VOUT 1.0VOUT
1000
1000
Output Current (mA)
Output Current (mA)
Figure Efficiency, VIN=3.7V
100%
100%
Figure Efficiency, VIN=5V
Efficiency
Efficiency
2.5VIN 3.3VIN
3.3VIN, -40C 3.3VIN, +85C
3.7VIN 5.0VIN
5.0VIN, -40C 5.0VIN, +85C
1000
1000
Output Current (mA)
Output Current (mA)
Figure 1.82VOUT Efficiency
Figure 1.82 VOUT Efficiency Over Temperature
2.5VIN
Output Ripple (mVp-p)
3.3VIN 3.7VIN
2.5VIN 3.3VIN 5VIN 5.0Vin, 2.2uF
Vout Error (mV)
5.0VIN
Load Current (mA)
Output Current (mA)
Figure 1.82VOUT Regulation (Normalized)
Figure 1.82VOUT Output Ripple with Optional 2.2µF COUT (1.5µF Actual)
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Typical Performance
Unless otherwise specified, 3.7V, 25°C,VIN
100%
3.3VIN
3.3VIN, 2.2uF 5.0VIN
Vout Error (mV)
Efficiency
5.0VIN, 2.2uF
2.5VIN 3.3VIN
3.7VIN 5.0VIN
1000
Output Current (mA)
Output Current (mA)
Figure 1.82VOUT Regulation (Normalized) with Optional 2.2µF COUT (1.5µF Actual)
Figure 1.23 VOUT Efficiency
100%
2.5VIN 3.3VIN
Vout Error (mV)
3.7VIN 5.0VIN
Efficiency
3.3VIN, -40C 3.3VIN, +85C
5.0VIN, -40C 5.0VIN, +85C
1000
Output Current (mA)
Output Current (mA)
Figure
1.23VOUT Efficiency Over Temperature
Figure
1.23VOUT Regulation (Normalized)
Figure
1.82VOUT Boundary
Figure
1.23VOUT Boundary
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Typical Performance
Unless otherwise specified, 3.7V, 25°C,VIN
Figure Quiescent Current Over Temperature (EN=VIN) Figure
Shutdown Current Over Temperature (EN=0V)
Figure 1.82VOUT Startup, 3.7VIN, Load
Figure
1.82VOUT Startup, 3.7VIN, Load
Figure 1.82VOUT Startup into Pre-Charged Output, 3.7VIN, 300mA Load
Figure
Over-Current Protection, 300mA Load Transition 300m Fault
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Typical Performance
Unless otherwise specified, 3.7V, 25°C,VIN
Figure
1.82VOUT Load Transient, 10-160mA, tR/tF=100ns
Figure 1.82VOUT Load Transient, 150-500mA, tR/tF=100ns
Figure 1.82VOUT Load Transient, 10-160mA, tR/tF=100ns with Optional 2.2µF COUT
Figure 1.82VOUT Load Transient, 150-500mA, tR/tF=100ns with Optional 2.2µF COUT
Figure 1.82VOUT Line Transient, 3.6-4.2VIN, tR/tF=10µs, with 10mA Load
Figure 1.82VOUT Line Transient, 3.6-4.2VIN, tR/tF=10µs, with 300mA Load
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Operation Description
FAN4603 600mA, step-down, switching-voltage regulator that delivers fixed output from input voltage supply 2.3V 5.5V. Using proprietary architecture with synchronous rectification, FAN4603 capable delivering peak efficiency >90%, while maintaining efficiency over load currents 1mA. regulator operates nominal frequency 6MHz. prevent shutdown during soft-start, following condition must met:
IDISP ILOAD IMAX(DC)
where IMAX(DC) maximum load current guaranteed support (600mA). Table shows combinations external COUT that allow start successfully with minimum RLOAD that supported each. Table Minimum RLOAD Values Soft-Start with Various External COUT Values
Control Scheme
FAN4603 uses proprietary, non-linear, fixed-frequency modulator deliver fast load transient response, while maintaining constant switching frequency over wide range operating conditions. Regulator stability dependent output capacitor ESR, which allows ceramic capacitors. Although this type operation normally results switching frequency that varies with input voltage load current, internal frequency loop holds switching frequency constant over large range input voltages load currents. very light loads, FAN4603 incorporates discontinuous current (DCM) single-pulse mode, which produces lower output ripple when compared with other architectures. Transition between seamless, with glitch less than 20mV VOUT during transition between modes. Combined with exceptional transient response characteristics, very quiescent current controller (35µA) maintains high efficiency; even very light loads, while preserving fast transient response applications requiring tight output regulation.
COUT
2.2F, 0402 4.7F, 0402 10F, 0603
Minimum RLOAD
VOUT 0.55 VOUT 0.50 VOUT 0.45
Multiple soft-start cycles required COUT>10f (15f with load). shuts down when IDISP+ ILOAD exceeds ILIMIT more than current limit. then begins soft-start cycle. Subsequent soft-start cycles begin with charge retained COUT while off, allowing VOUT incrementally reach regulation over multiple soft-start attempts.
Current Limit, Fault Shutdown, Restart
heavy load short circuit output causes current increase until maximum current threshold reached. Upon reaching this point, high-side switch turns off, preventing high currents from causing damage. regulator continues limit current cycle-by-cycle. After 21µs current limit, regulator triggers over-current fault, causing regulator shut down about before attempting automatic restart. fault caused short circuit, soft-start circuit attempts restart produces over-current fault after about 32s, which results duty cycle less than 30%, limiting power dissipation.
Enable Soft-Start
When LOW, circuits FAN4603 draws ~100nA current. When HIGH above UVLO threshold, regulator begins soft-start cycle. output ramp during soft-start fixed slew rate 50mV/s from VOUT, then 12.5mV/s until output reaches setpoint. mode operation prohibited during soft-start cycle prevent COUT from being discharged. This allows glitchless starting into pre-charged output.
Under-Voltage Lockout (UVLO)
When HIGH, under-voltage lockout keeps part from operating until input supply voltage rises high enough properly operate. This ensures misbehavior regulator during startup shutdown.
Startup into Large COUT
fail start heavy load applied during startup large external COUT present. This current-limit fault response, which protects overcurrent condition during soft-start. current required charge COUT during soft-start, referred "displacement current," given
IDISP
Thermal Shutdown
When temperature increases, high load condition and/or high ambient temperature, output switching disabled until temperature fallen sufficiently. junction temperature which thermal shutdown activates nominally 150°C with 15°C hysteresis. After cooling, automatically restarts, with soft-start cycle.
where
refers soft-start slew rate.
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Reducing Output Ripple
output ripple amplitude reduced adding external COUT, with negligible impact efficiency. Reduced output ripple also results less voltage excursion very light loads. Maximum ripple occurs load VOUT proportional.
Layout Guideline
Figure Figure Typical 1.82VOUT Load Ripple Note: Ripple less lower VOUT levels. effective value external COUT desired ripple amplitude determined using:
VOUT VOUT OUT.
Recommended Layout
(pin must directly connected VOUT (pin Figure shows recommended locations optional COUT, shown 0603 size devices. shown Figure "Land Pattern," optional pin. Connection required PCB.
where desired output ripple amplitude VOUT Volts. simplified equation above representative nominal component values does account device tolerances. bias level effects associated with case size, voltage rating, dielectric type ceramic capacitors should considered when selecting COUT.
Minimum Off-Time Effect Switching Frequency
tOFF(MIN) 50ns, while tON(MIN) 35nS This imposes constraints maximum/minimum that FAN4603 provide while maintaining fixed switching frequency mode. When LOW, fixed switching maintained long VOUT tOFF When HIGH, fixed switching maintained long
VOUT
switching frequency drops when regulator cannot provide sufficient duty cycle 6MHz maintain regulation. Lowering switching frequency allows VOUT remain regulation, even very very high duty cycle.
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
Physical Dimensions
0.95
0.05
2.50 0.13 0.50
0.25 0.95 0.32
MARK
3.70 4.00 1.10
1.45 0.10
0.78 0.40
0.50 1.45
1.30 0.05
0.30
0.63 0.80 2.70
LAND PATTERN RECOMMENDATION
1.10 0.90
VIEW
0.10
0.05 0.00
0.08
SEATING PLANE
2.50 0.85 0.65
1.20
1.45 1.35
0.50 0.30 1.25 1.15
0.68 0.48
NOTES: THIS PACKAGE PRESENTLY REGISTERED WITH STANDARDS COMMITTEE. DIMENSIONS MILLIMETERS. DIMENSIONS INCLUSIVE BURRS, MOLD FLASH, PROTRUSIONS. DRAWING CONFORMS ASME Y14.5M-1994 DRAWING FILENAME: MKT-MOD06AArev3
0.40 0.15
4.00
(0.40)
MARK
0.23 (0.25) BOTTOM VIEW
Figure 6-Lead, MicroModule
Package drawings provided service customers considering Fairchild components. Drawings change manner without notice. Please note revision and/or date drawing contact Fairchild Semiconductor representative verify obtain most recent revision. Package specifications expand terms Fairchild's worldwide terms conditions, specifically warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor's online packaging area most recent package drawings:
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
FAN4603 600mA, Fully Integrated Buck Power Supply Module
2009 Fairchild Semiconductor Corporation FAN4603 Rev. 1.0.1
www.fairchildsemi.com
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