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Microsemi Corporation - LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS

Numéro de référence LX432ISC
Description LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
Fabricant Microsemi Corporation 
Logo Microsemi Corporation 





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LX432ISC fiche technique
T H E I N F I N I T E P O W E R O F I N N O VAT I O N
LX432
LOW VOLTAGE ADJUSTABLE PRECISION SHUNT REGULATORS
PRODUCTION DATA SHEET
DESCRIPTION
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. 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.
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
TYPICAL PROGRAMMABLE VOLTAGE
REFERENCE CIRCUIT
VIN
Cathode
LX432
Anode
Reference
R1
R2
KEY FEATURES
s Low Voltage Operation: 1.24V Reference
s Initial Voltage Reference Accuracy 1%
s Adjustable Output Voltage From V To 20V
REF
s Typical Output Dynamic Impedance Less
Than 250m
s Sink Current Capability 80µA To 20mA
s Direct Alternative To TLV431
A P P L I C AT I O N S
s Low Voltage Adjustable Power Supplies
s Instrumentation
s Computers
s Portable Equipment
VKA
GND
Copyright © 1999
Rev. 1.0 9/99
TA (°C)
0 to 70
-40 to 85
PACKAGE ORDER INFORMATION
SC
Plastic
3-pin
SOT-23
SE
Plastic
5-pin
SOT-23
LP
Plastic
3-pin
TO-92
LX432CSC
LX432ISC
LX432CSE
LX432ISE
LX432CLP
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.
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1

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