Product Summary

The LM317 is an adjustable 3-terminal positive voltage regulator capable of supplying in excess of 100mA over an output voltage range of 1.2 V to 37 V. This voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. Further, it employs internal current limiting; thermal shutdown and safe area compensation, making them essentially blow-out proof. The LM317 serves a wide variety of applications including local, on card regulation. The LM317 can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the LM317 can be used as a precision current regulator.

Parametrics

LM317 absolute maximum ratings: (1)Input-Output Voltage Differential, VI-VO: 40Vdc; (2)Power Dissipation, PD: Internally Limited W; (3)Operating Junction Temperature Range, TJ: -40 to +125℃; (4)Storage Temperature Range, Tstg: -65 to +150℃.

Features

LM317 features: (1)Pb-Free Packages are Available; (2)Output Current in Excess of 100mA; (3)Output Adjustable Between 1.2V and 37V; (4)Internal Thermal Overload Protection; (5)Internal Short Circuit Current Limiting; (6)Output Transistor Safe-Area Compensation; (7)Floating Operation for High Voltage Applications; (8)Standard 3-Lead Transistor Package; (9)Eliminates Stocking Many Fixed Voltages.

Diagrams

LM317 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
LM317
LM317

Other


Data Sheet

Negotiable 
LM317A
LM317A

Other


Data Sheet

Negotiable 
LM317AEMP
LM317AEMP

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

0-1000: $0.49
LM317AEMP/NOPB
LM317AEMP/NOPB

National Semiconductor (TI)

Linear Regulators - Standard 3-TERMINAL ADJ REG

Data Sheet

0-1: $1.13
1-25: $0.91
25-100: $0.82
100-250: $0.73
LM317AEMPX
LM317AEMPX

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

0-2000: $0.53
2000-4000: $0.49
4000-6000: $0.47
6000-10000: $0.46
LM317AEMPX/NOPB
LM317AEMPX/NOPB

National Semiconductor (TI)

Linear Regulators - Standard 3-TERMINAL ADJ REG

Data Sheet

0-1: $1.13
1-25: $0.91
25-100: $0.82
100-250: $0.73
LM317AH
LM317AH

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

0-500: $4.21
500-1000: $3.67
LM317AH/NOPB
LM317AH/NOPB

National Semiconductor (TI)

Linear Regulators - Standard

Data Sheet

0-1: $6.80
1-25: $5.57
25-100: $5.03
100-250: $4.62