PROGRAMMABLE PRECISION SHUNT REGULATOR

LM431/A/C

Apr. 2012 – Rev.1.1

- 1 -

HTC

FEATURES



Programmable Output Voltage to 40V



Guaranteed 0.5% Reference Voltage Tolerance



Low (0.2Ω Typ.) Dynamic Output Impedance



Cathode Current Range(Continuous) – 100 ~ 150 mA



Equivalent Full Range Temperature Coefficient of

50PPM/℃



Temperature Compensated For Operation Over

Full Rate Operating Temperature Range



Low Output Noise Voltage



Fast Turn-on Response



SOT-23 3L Package

APPLICATION



Shunt Regulator



Precision High-Current Series Regulator



High-Current Shunt Regulator



Crowbar Circuit



PWM Converter With Reference



Voltage Monitor



Precision Current Limiter

DESCRIPSION

SOT-23 PKG

ORDERING INFORMATION

DEVICE

PACKAGE

LM431SF

SOT-23 3L

* Refer to the page 2 for detailed ordering Information,

The LM431 is a three-terminal adjustable shunt regulator with specified thermal stability over applicable

impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making this device

excellent replacement for zener diodes in many applications. The LM431 is characterized for operation from -

40℃ to +125℃.

ABSOLUTE MAXIMUM RATINGS

(Operating temperature range applies unless otherwise specified)

CHARACTERISTIC

SYMBOL

MIN.

MAX.

UNIT

Cathode Voltage

-

42

V

Cathode Current Range(Continuous)

-100

150

mA

Reference Input Current Range

-0.05

10

mA

Junction Temperature Range

-40

150

℃

Operating Temperature Range

-40

125

℃

Storage Temperature Range

-60

150

℃