L431VB 查看數據表（PDF） - Niko Semiconductor

零件编号

产品描述 (功能)

比赛名单

L431VB

2.5V Low-Voltage Adjustable Precision Shunt Regulator

Niko Semiconductor 

NIKO-SEM

2.5V Low-Voltage Adjustable

Precision Shunt Regulator

L431

GENERAL DESCRIPTION

The L431 is a three-terminal adjustable shunt

regulator utilizing an accurate 2.5V band-gap

reference. The output voltage can be set to any

value between 2.5V (VREF) to 29V with two

external resistors as shown in the typical

application circuit. The device exhibit a wide

operating current range of 0.4 to 100 mA with a

typical dynamic impedance of 0.25Ω. The cha-

racteristics of these reference make it exce-

llent replacements for zener diodes in many

applications such as digital voltmeters, power

supplies, and op amp circuitry. The 2.5V volt

reference makes it convenient to obtain a

stable reference from 5.0V logic supplies.

The L431 shunt regulator is available in three

voltage tolerances (0.5%, 1.0% and 2%) and

three package options (TO-92, SOT-23-3,

SOT-23-5 and SOIC-8).

FEATURES

z Internal amplifier with 70 mA capability

z Programmable output voltage to 29V

z 0.25Ωtypical output impedance

z Pin to pin compatible with TL431, LM431

, SC431 & AS431

z Trimmed band-gap design 0.5%, 1.0%

and 2% with three package options

z Low cost solution

APPLICATIONS

z Linear regulator controller

z Precision voltage reference

z Switching power supplies

z Battery operating equipment

z Instrumentation

z PCs, Computer disk drives

SYMBOL & BLOCK DIAGRAM

Cathode (K)

Reference (R)

Anode (A)

SYMBOL

Reference

(R)

+

-

2.5 Vref

Cathod

(K)

Anode (A)

FUNCTIONAL BLOCK DIAGRAM

1

JAN-08-Y02

Share Link: