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LM317 3-TERMINAL ADJUSTABLE REGULATOR
Output Voltage Range Adjustable From Output Current Greater Than Internal Short-Circuit Current Limiting Thermal Overload Protection Output Safe-Area Compensation Package Options Include Plastic Small-Outline Transistor SOT-223 (DCY), Flange Mounted (KTE) Heat-Sink Mounted (KC) Packages
PACKAGE (TOP VIEW)
INPUT OUTPUT ADJUST
OUTPUT terminal electrical contact with mounting base. TO-220AB
description
LM317 adjustable three-terminal positive-voltage regulator capable supplying more than over output-voltage range exceptionally easy requires only external resistors output voltage. Furthermore, both line load regulation better than standard fixed regulators. LM317 packaged (TO-220AB) packages, which easy handle use. addition having higher performance than fixed regulators, this device includes on-chip current limiting, thermal overload protection, safe-operating-area protection. overload protection remains fully functional, even ADJUST terminal disconnected. LM317 versatile applications, including uses programmable output regulation local on-card regulation. connecting fixed resistor between ADJUST OUTPUT terminals, LM317 function precision current regulator. optional output capacitor added improve transient response. ADJUST terminal bypassed achieve very high ripple-rejection ratios, which difficult achieve with standard three-terminal regulators. LM317 characterized operation over virtual junction temperature range 125°C.
PACKAGE (TOP VIEW)
INPUT OUTPUT ADJUST
OUTPUT terminal electrical contact with mounting base.
PACKAGE (TOP VIEW)
INPUT OUTPUT ADJUST
Please aware that important notice concerning availability, standard warranty, critical applications Texas Instruments semiconductor products disclaimers thereto appears this data sheet.
Copyright 2002, Texas Instruments Incorporated
PRODUCTION DATA information current publication date. Products conform specifications terms Texas Instruments standard warranty. Production processing does necessarily include testing parameters.
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
AVAILABLE OPTIONS PACKAGED DEVICES HEAT SINK (DCY) HEAT-SINK MOUNTED, TO-220 (KC) PLASTIC FLANGE MOUNTED, POWER FLEX (KTE)
125°C LM317DCY LM317KC LM317KTER package also available taped reeled, e.g., LM317DCYR. package compatible footprint with TO-263 mounted TO-263 land pattern. package only available taped reeled.
schematic diagram
INPUT
OUTPUT ADJUST
absolute maximum ratings over virtual junction temperature range (unless otherwise
Input-to-output differential voltage, Package thermal impedance, (see Notes package 49°C/W package 25°C/W package 23°C/W Lead temperature (1/16 inch) from case seconds 260°C Storage temperature range, Tstg -65°C 150°C
Stresses beyond those listed under "absolute maximum ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "recommended operating conditions" implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability. NOTES: Maximum power dissipation function TJ(max), maximum allowable power dissipation allowable ambient temperature (TJ(max) TA)/JA. Operating absolute maximum 150°C affect reliability. package thermal impedance calculated accordance with JESD 51-5.
recommended operating conditions
Input-to-output voltage differential Output current Operating virtual junction temperature UNIT
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
electrical characteristics over recommended ranges operating virtual junction temperature (unless otherwise noted)
PARAMETER Input voltage (line) regulation CADJ 25°C 125°C Thermal regulation ADJUST terminal current Change ADJUST terminal current Reference voltage (Vref) (OUTPUT ADJUST) Output-voltage temperature stability Minimum load current maintain regulation Peak output current Output noise voltage (RMS) Ripple rejection 1500 1500 125°C PMAX (see Note PMAX (see Note 25°C kHZ, 25°C CADJ CADJ 0.15 20-ms pulse, 25°C TEST CONDITIONS 25°C 125°C 0.01 0.02 0.03 1.25 0.003 0.04 0.07 0.07 UNIT %VO/W
Output voltage (load) regulation
1500
Long-term stability 25°C %/1k Unless otherwise noted, following test conditions apply: IOMAX 125°C. Pulse testing techniques used maintain junction temperature close ambient temperature possible. Input regulation expressed here percentage change output voltage change input. CADJ connected between ADJUST terminal GND. NOTE Maximum power dissipation function TJ(max), maximum allowable power dissipation allowable ambient temperature (TJ(max) TA)/JA. Operating absolute maximum 150°C affect reliability.
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
APPLICATION INFORMATION
LM317 INPUT OUTPUT (Note IAdj Vref 1.25 (Note
ADJUST
NOTES: required regulator close enough power-supply filter. improves transient response, needed stability. Vout calculated Since IAdj typically negligible most applications.
Figure Adjustable Voltage Regulator
LM317 INPUT OUTPUT
ADJUST
Vout calculated
Since IAdj typically negligible most applications.
Adj(R2
Figure 30-V Regulator Circuit
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
APPLICATION INFORMATION
LM317 INPUT OUTPUT 1N4002 (see Note
ADJUST
NOTE discharges output shorted ground.
Figure Adjustable Regulator Circuit With Improved Ripple Rejection
LM317 INPUT OUTPUT limit
ADJUST
Figure Precision Current-Limiter Circuit
ADJUST INPUT OUTPUT
LM317
LM317 OUTPUT INPUT ADJUST
Output Adjust
Figure Tracking Preregulator Circuit
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
APPLICATION INFORMATION
LM317 INPUT OUTPUT
ADJUST
Figure 1.2-V 20-V Regulator Circuit With Minimum Program Current
LM317 INPUT OUTPUT
LM317 INPUT OUTPUT
LM317 INPUT OUTPUT
ADJUST
ADJUST
ADJUST
Minimum load current from each output output voltages within each other.
Figure Adjusting Multiple On-Card Regulators With Single Control
LM317 INPUT OUTPUT
(see Note
ADJUST
NOTE controls output impedance charger. allows charging rates with fully charged battery.
Figure Battery-Charger Circuit
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
APPLICATION INFORMATION
LM317 INPUT OUTPUT
ADJUST
Figure 50-mA Constant-Current Battery-Charger Circuit
LM317 INPUT OUTPUT 2N2905 1N4002
ADJUST
Figure Slow Turn-On 15-V Regulator Circuit
LM317 INPUT OUTPUT
ADJUST
VI(PP) ADJUST INPUT OUTPUT
VO(PP) (TYP)
LM317
Figure Voltage-Regulator Circuit
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
APPLICATION INFORMATION
LM317 INPUT OUTPUT
ADJUST
(see Note NOTE sets peak current (0.6 resistor).
Figure Current-Limited Charger Circuit
LM317 INPUT OUTPUT
ADJUST
LM317 INPUT OUTPUT
ADJUST LM317 INPUT OUTPUT
ADJUST TL080
2N2905
Figure Adjustable Regulator Circuit
POST OFFICE 655303
DALLAS, TEXAS 75265
LM317 3-TERMINAL ADJUSTABLE REGULATOR
APPLICATION INFORMATION
TIP73
2N2905
LM317 INPUT OUTPUT 1N4002 Note
ADJUST
(see Note
NOTES: minimum load current This optional capacitor improves ripple rejection.
Figure High-Current Adjustable Regulator Circuit
POST OFFICE 655303
DALLAS, TEXAS 75265
IMPORTANT NOTICE Texas Instruments Incorporated subsidiaries (TI) reserve right make corrections, modifications, enhancements, improvements, other changes products services time discontinue product service without notice. Customers should obtain latest relevant information before placing orders should verify that such information current complete. products sold subject TI's terms conditions sale supplied time order acknowledgment. warrants performance hardware products specifications applicable time sale accordance with TI's standard warranty. Testing other quality control techniques used extent deems necessary support this warranty. Except where mandated government requirements, testing parameters each product necessarily performed. assumes liability applications assistance customer product design. Customers responsible their products applications using components. minimize risks associated with customer products applications, customers should provide adequate design operating safeguards. does warrant represent that license, either express implied, granted under patent right, copyright, mask work right, other intellectual property right relating combination, machine, process which products services used. Information published regarding third-party products services does constitute license from such products services warranty endorsement thereof. such information require license from third party under patents other intellectual property third party, license from under patents other intellectual property Reproduction information data books data sheets permissible only reproduction without alteration accompanied associated warranties, conditions, limitations, notices. Reproduction this information with alteration unfair deceptive business practice. responsible liable such altered documentation. Resale products services with statements different from beyond parameters stated that product service voids express implied warranties associated product service unfair deceptive business practice. responsible liable such statements.
Mailing Address: Texas Instruments Post Office 655303 Dallas, Texas 75265
Copyright 2002, Texas Instruments Incorporated
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