LX432
LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
T H E I N F I N I T E P O W E R O F I N N O V A T I O N
P R O D U C T I O N D A T A S H E E T
DESCRIPTION
KEY FEATURES
Low Voltage Operation: 1.24V Reference
Initial Voltage Reference Accuracy 1%
Adjustable Output Voltage From VREF To 20V
Typical Output Dynamic Impedance Less
Than 250mΩ
Sink Current Capability 80µA To 20mA
Direct Alternative To TLV431
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
250mΩ. The LX432 series operates with
an operating current as low as 80µA,
making these devices suitable for por-
table and micropower applications.
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.
APPLICATIONS
Low Voltage Adjustable Power Supplies
Instrumentation
Computers
Portable Equipment
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
TY P I C A L PR O G R A M M A B L E VO LTA G E
RE F E R E N C E CI R C U I T
VIN
VKA
R1
Cathode
LX432
Reference
Anode
R2
GND
PACKAGE ORDER INFORMATION
Plastic SOT-23
3-pin
Plastic SOT-23
5-pin
Plastic TO-92
TA (°C)
SC
SE
LP
3-pin
LX432CLP
LX432ILP
0 to 70
LX432CSC
LX432ISC
LX432CSE
LX432ISE
-40 to 85
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.
L I N F I N I T Y M I C R O E L E C T R O N I C S I N C .
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
Copyright © 1999
Rev. 1.0 9/99
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