AIC431_15 Datasheet, PDF (1/14 Pages) Analog Intergrations Corporation – Adjustable Precision Shunt Regulator

AIC431/TL431A/TL431
Adjustable Precision Shunt Regulator
 ^FEATURES
 Precision Reference Voltage.
AIC431 :2.495V 0.5%
TL431A :2.495V 1.0%
TL431 :2.495V 1.6%
 Sink Current Capability: 200mA.
 Minimum Cathode Current for
250A.
Regulation:
 Equivalent Full-Range Temperature Coefficient:
50 ppm/C.
 Fast Turn-On Response.
 Low Dynamic Output Impedance: 0.08.
 Adjustable Output Voltage.
 Low Output Noise.
 Space Saving Packages: SOT-89, SOT-23,
TO-92 and SO-8.
 ^APPLICATIONS
 Linear Regulators.
 Adjustable Supplies.
 Switching Power Supplies.
 Battery Operated Computers.
 Instrumentation.
 Computer Disk Drivers.
 ^{TYPICAL APPLICATION CIRCUIT}
V_IN
V_OUT
+
C1
R3
AIC431
R1 ⁺
C2
R2
 ^DESCRIPTION
The AIC431, TL431A and TL431 are 3-
terminal adjustable precision shunt
regulators with guaranteed temperature
stability over the applicable extended
commercial temperature range. The output
voltage may be set at any level greater than
2.495V (V_REF) up to 30V merely by selecting
two external resistors that act as a voltage
divider network. These devices have a
typical output impedance of 0.08. Active
output circuitry provides a very sharp turn-on
characteristic, making these devices
excellent improved replacements for zener
diodes in many applications.
The precise 0.5% reference voltage
tolerance of the AIC431 makes it possible in
many applications to avoid the use of a
variable resistor, consequently saving cost
and eliminating drift and reliability problems
associated with it.
V_OUT=(1+R1/R2) VREF
Precision Regulator
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I, Science Park, Hsinchu 300, Taiwan, R.O.C.
TEL: [phone]
FAX: [phone] www.analog.com.tw
DS-431G-05 20120615
1