OF

LX432

DESCRIPTION

KEY FEA TURES

s Low Voltage Operation: 1.24V Reference

s Initial Voltage Reference Accuracy 1%

s Adjustable Output Voltage From V

s Typical Output Dynamic Impedance Less

Than 250m

Ω

s Sink Current Capability 80µA To 20mA

s Direct Alternative To TLV431

Low voltage operation enables the

LX432 to be used in the feedback loop

of isolated low voltage power sup-

plies. The minimum output voltage is

determined by the LX432 output voltage

plus the forward voltage drop of the

opto-coupler LED (typically 1.24 + 1.4 =

2.64V minimum). See Figure 10.

The LX432 is offered in 3 and 5-pin

SOT-23 or TO-92 packages, and is a drop-

in replacement for the TLV431 and

SC431L devices.

The LX432 series are low-voltage pre-

cision adjustable shunt regulators

with a reference voltage of 1.24V. The

output voltage may be set to any value

between 1.24V and 20V by two external

resistors.

These devices offer low output im-

pedance for improved load regula-

tion — typical output impedance is

250m

Ω. The LX432 series operates with

an operating current as low as 80µA,

making these devices suitable for por-

table and micropower applications.

PRODUCT H IGHLIGHT

P ACKAGE ORDER INFORMA TION

T

Plastic SOT-23

3-pin

SC

Plastic SOT-23

5-pin

SE

0 to 70

LX432CSC

LX432CSE

LX432CLP

-40 to 85

LX432ISC

LX432ISE

LX432ILP

Note: All surface-mount packages are available in Tape & Reel.

Append the letter "T" to part number. (i.e. LX432CSET)

TO-92 (LP) package also available in ammo-pack.

Copyright © 1999

Rev. 1.0

9/99

1

APPLICA TIONS

s Low Voltage Adjustable Power Supplies

s Instrumentation

s Computers

s Portable Equipment

LX432

R1

R2

GND

V

KA

V

IN

Cathode

Anode

Reference

IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.

Plastic TO-92

3-pin

LP