BL431

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ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

BL431

DESCRIPTION

Outline Drawing

The BL431

is a three- terminal

adjustable

regulator with a guaranteed thermal stability over

applicable temperature ranges. The output voltage

may

be

set

to

any

value

between

V

R

E

F

(approximately 2 . 5 V) and 36 V with two external

resistors. This device has typical dynamic output

impedance

of

0 . 2 Ω .

Active

output

circuitry

provides a very sharp turn - on characteristic,

making these devices excellent replacement for zener diodes in many

applications.

FEATURE



Programmable output voltage to 36 V



Low dynamic output impedance 0 . 2 Ω typical



Sink current capability of 1 . 0mA to 100 mA



Equivalent full- range temperature coefficient of 50 ppm/ ℃ typical



Temperature compensated for operation over full rated



operating temperature range



Low output noise voltage



Fast turn on response

BLOCK DIAGRAM

PIN CONNECTION

S O T23

TO -9 2