3-Terminal Positive Adjustable Regulator Output Current Excess Ou

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3-Terminal Positive Adjustable Regulator Output Current Excess Ou

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LM317
3-Terminal Positive Adjustable Regulator
Output Current Excess Output Adjustable Between 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 Input
Internal Block Diagram
Input
Voltage Reference
Protection Circuitry
Rlimit
Output
Vadj
Rev. 1.0.0
©2001 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
Electrical Characteristics
(VI-VO=5V, 0.5A, 125°C, IMAX 1.5A, PDMAX 20W, unless otherwise specified) Parameter Line Regulation (Note1) 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 10µF (Note2) +25°C point measurements, 1000HR Typ. 0.01 0.02 1.25 0.003 Max. 0.04 0.07 1.30 0.01 Unit
Load Regulation (Note1)
Rload
1.20
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) CADJ, when used, connected between adjustment ground.
LM317
Typical Perfomance 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 100µA, error associated with this term negligible most applications.
LM317
Mechanical Dimensions
Package
TO-220
9.90 ±0.20 4.50 ±0.20
1.30 ±0.10
2.80 ±0.10
(8.70) ±0.10
(1.70)
1.30 -0.05
+0.10
9.20 ±0.20
(1.46)
13.08 ±0.20
(1.00)
(3.00)
15.90 ±0.20
1.27 ±0.10
1.52 ±0.10
0.80 ±0.10 2.54TYP [2.54 ±0.20] 2.54TYP [2.54 ±0.20]
10.08 ±0.30
18.95MAX.
(3.70)
(45°
0.50 -0.05
+0.10
2.40 ±0.20
10.00 ±0.20
LM317
Ordering Information
Product Number LM317T Package TO-220 Operating Temperature 125°C
LM317
LM317
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 6/1/01 0.0m Stock#DSxxxxxxxx 2001 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 Ou

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