TL432N3 Datasheet, PDF (1/15 Pages) Cystech Electonics Corp. – Adjustable shunt regulator

CYStech Electronics Corp.
Adjustable shunt regulator
TL432A3/N3/M3/K3
Spec. No. : C504K3
Issued Date : 2003.03.21
Revised Date : 2013.10.23
Page No. : 1/15
Description
TheTL432 is a three terminal adjustable shunt
regulator with thermal stability guaranteed over
temperature. The output voltage can be adjusted
to any value from 1.24V(VREF) to 18V with two
external resistors. The TL432 has a typical dynamic
output impedance of 0.2Ω. Active output circuitry
provides a very sharp turn on characteristic, making
the TL432 an excellent replacement for zener diodes.
The TL432 shunt regulator is available with two
voltage tolerances(0.5%, and 1% ), and four package
options(TO-92, SOT-23, SOT-89 and TO-92L).
This allows the designer the opportunity to select the
optimum combination of cost and performance for
their application.
Features
◆Low voltage operation(down to 1.24V)
◆Fast turn on response
◆Low dynamic output impedance 0.2Ω typ.
◆Trimmed bandgap design : ±0.5%
◆Sink current capability : 100mA
◆Available in TO-92, SOT-23, SOT-89, and
TO-92L packages
Applications
◆Linear Regulators
◆Adjustable Supplies
◆Switching Power Supplies
◆Battery Operated Computers
◆Instrumentation
◆Computer Disk Drives
Typical Application Circuit(Note 1,2)
TL432
Notes:
1) Set VOUT according to the following equation:
VOUT=VREF(1+R1/R2)+IREFR1
2) Choose the value for R as follows:
˙The maximum limit for R should be such that the
cathode current, Iz, is greater than the minimum
operating current(80μA) at VIN(MIN).
˙The minimum limit for R should be as such that Iz
does not exceed 100mA under all load conditions,
and the instantaneous turn-on value for Iz does not
exceed 150mA. Both of the following conditions
must be met:
Rmin≥VIN(max)/150mA(to limit instantaneous
turn-on Iz)
Rmin≥ VIN(max)-VOUT (to limit Iz under
IOUT(min)+100mA normal operating
conditions)
TL432A3/N3/M3/K3
CYStek Product Specification