TA431 Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – ADJUSTABLE PRECISION ZENER SHUNT REGULATOR

TMC
TA431
ADJUSTABLE PRECISION ZENER SHUNT REGULATOR
TA 431
DESCRIPTION
The TA431 is a three-terminal adjustable regulator with a guaranteed thermal stability over
applicable temperature ranges. The output voltage may be set to any value between VREF
(approximately 2.5V) and 36V with two external resistors. This device has typical dynamic output
impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making
these devices excellent replacement for zener diodes in many applications.
FEATURE
 Programmable output voltage to 36V
 Low dynamic output impedance 0.2Ωtypical
 Sink current capability of 1.0mA to 100mA
 Equivalent full-range temperature coefficient of 500ppm/℃ typical
 Temperature compensated for operation over full rated operating temperature range
 Low output noise voltage
 Fast turn on response
EQUIVALENT CIRCUIT
Q7
Vref
C1 ^Q3
R6
12K
R7
12K
Q5
R3
Q4
Q6
800 _R4
2.5K
R5
640
CATHODE
C2
(Vz)
Q2
Q1
R2
1K
R1
3.3K
ANODE
(GND)
ABSOLUTE MAXIMUM RATINGS
1