3-Terminal Positive Adjustable Regulator Output Current Excess 1.

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3-Terminal Positive Adjustable Regulator Output Current Excess 1.

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LM317
3-Terminal Positive Adjustable Regulator
Output Current Excess 1.5A Output Adjustable Between 1.2V Internal Thermal Overload Protection Internal Short Circuit Current Limiting Output Transistor Safe Operating Area Compensation TO-220 Package
Description
This monolithic integrated circuit adjustable 3-terminal positive voltage regulator designed supply more than 1.5A load current with output voltage adjustable over 37V. employs internal current limiting, thermal shut-down safe area compensation.
TO-220
Output
Output Input
Internal Block Diagram
Input
Voltage Reference
Protection Circuitry
Rlimit
Output
Vadj
Rev. 1.0.3
©2009 Fairchild Semiconductor Corporation
LM317
Absolute Maximum Ratings
Parameter Input-Output Voltage Differential Lead Temperature Power Dissipation Operating Junction Temperature Range Storage Temperature Range Temperature Coefficient Output Voltage Symbol TLEAD TSTG Vo/T Value Internally limited +125 +125 ±0.02 Unit %/°C
Note Absolute Maximum Ratings: those values beyond which safety device cannot guaranteed. device should operated these limits. parametric values defined Electrical Characteristics tables guaranteed absolute maximum ratings. "Recommended Operating Conditions" table will define conditions actual device operation.
Electrical Characteristics
(VI-VO 0.5A, +125°C, IMAX 1.5A, PDMAX 20W, unless otherwise specified) Parameter Line Regulation (Note2) Symbol Rline Conditions +25°C +25°C, 10mA IMAX 10mA IMAX 10mA IMAX PMAX 10mA IMAX PMAX 15V, PMAX 40V, PMAX TA=25°C +25°C, 10Hz 10kHz 10V, 120Hz without CADJ CADJ (Note3) +25°C point measurements, 1000HR Min. Typ. 0.01 0.02 1.25 0.003 Max. 0.04 0.07 1.30 0.01 Unit mV%/VO
Load Regulation (Note2)
Rload
1.20
mV%/VO %/VO %/VO °C/W
Adjustable Current Adjustable Current Change Reference Voltage Temperature Stability Minimum Load Current Maintain Regulation Maximum Output Current Noise, VOUT Ripple Rejection Long-Term Stability, THIGH Thermal Resistance Junction Case
IADJ IADJ VREF IL(MIN) IO(MAX)
Note Load line regulation specified constant junction temperature. Change heating effects must taken into account separately. Pulse testing with duty used. (PMAX 20W) Note CADJ, when used, connected between adjustment ground.
LM317
Typical Performance Characteristics
OUTPUT VOLTAGE DEVIATION(%)
TEMPERATURE (°C)
ADJUSTMENT CURRENT(uA)
TEMPERATURE (°C)
Figure Load Regulation
Figure Adjustment Current
INPUT-OUTPUT DIFFERENTIAL(V)
REFERENCE VOLTAGE(V)
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure Dropout Voltage
Figure Reference Voltage
LM317
Typical Application
Input
LM317 KA317
Vadj
Output
1.25V R1)+Iadj
Figure Programmable Regulator
required when regulator located appreciable distance from power supply filter. needed stability, however, does improve transient response. Since IADJ controlled less than 100A, error associated with this term negligible most applications.
LM317
Mechanical Dimensions
Package Dimensions millimeters
TO-220 SINGLE GAUGE
LM317
Ordering Information
Product Number LM317T Package TO-220 Operating Temperature +125°C
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES RIGHT MAKE CHANGES WITHOUT FURTHER NOTICE PRODUCTS HEREIN IMPROVE RELIABILITY, FUNCTION DESIGN. FAIRCHILD DOES ASSUME LIABILITY ARISING APPLICATION PRODUCT CIRCUIT DESCRIBED HEREIN; NEITHER DOES CONVEY LICENSE UNDER PATENT RIGHTS, RIGHTS OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT FAIRCHILD SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user.
www.fairchildsemi.com 7/7/09 0.0m Stock#DS400281 2009 Fairchild Semiconductor Corporation
critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.

3-Terminal Positive Adjustable Regulator Output Current Excess 1.

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