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Shunt Regulator. AME431B Datasheet

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Shunt Regulator. AME431B Datasheet






AME431B Regulator. Datasheet pdf. Equivalent




AME431B Regulator. Datasheet pdf. Equivalent





Part

AME431B

Description

Adjustable Precision Shunt Regulator

Manufacture

Analog Microelectronics

Datasheet
Download AME431B Datasheet


Analog Microelectronics AME431B

AME431B; www.DataSheet4U.com AME, Inc. AME431B A djustable Precision Shunt Regulator n General Description The AME431B series ICs are 3-terminal adjustable shunt reg ulator with guaranteed temperature stab ility over a full operation range. Thes e ICs feature sharp turn-on characteris tics, low temperature coefficient and l ow output impendance, which make them i deal substitutes f.


Analog Microelectronics AME431B

or Zener diodes in applications such as switching power supply, charger and oth er adjustable regulators. The reference is set to 1.24V for AME431Bxxxxx12 and 2.5V for AME431Bxxxxx25. The output vo ltage can be set to 1.24V to 16V for VR EF=1.24V part type and 2.5 to 36V for V REF=2.5V part type with two external re sistors. The AME431B precision referenc e is offered in tw.


Analog Microelectronics AME431B

o reference tolerance: 0.5% and 1.0% The 5 main packages have low thermal impen dance which allows operation over a wid e range of -40oC t o +125oC. n Functio nal Block Diagram V+ (Cathode) REF VR EF GND (Anode) n Features l Very accu rate reference voltage : 0.15% typical l High stability under capacitive load l Low temperature deviation: 4.5mV typi cal l Low equivale.



Part

AME431B

Description

Adjustable Precision Shunt Regulator

Manufacture

Analog Microelectronics

Datasheet
Download AME431B Datasheet




 AME431B
www.DataSheet4U.com
AME, Inc.
AME431B
n General Description
The AME431B series ICs are 3-terminal adjustable
shunt regulator with guaranteed temperature stability over
a full operation range. These ICs feature sharp turn-on
characteristics, low temperature coefficient and low out-
put impendance, which make them ideal substitutes for
Zener diodes in applications such as switching power
supply, charger and other adjustable regulators.
The reference is set to 1.24V for AME431Bxxxxx12 and
2.5V for AME431Bxxxxx25. The output voltage can be
set to 1.24V to 16V for VREF=1.24V part type and 2.5 to
36V for VREF=2.5V part type with two external resistors.
The AME431B precision reference is offered in two ref-
erence tolerance: 0.5% and 1.0%
The 5 main packages have low thermal impendance
which allows operation over a wide range of -40oC t o
+125oC.
Adjustable Precision Shunt Regulator
n Functional Block Diagram
V+ (Cathode)
REF
VREF
GND (Anode)
n Features
l Very accurate reference voltage : 0.15% typical
l High stability under capacitive load
l Low temperature deviation: 4.5mV typical
l Low equivalent full-range temperature coefficient
with 20PPM/oC typical
l Low dynamic output resistance: 0.2typical
l Sink current capacity from 1mA to 100mA
l Low output noise
l Available in 5 packages: TO-92, SOT-23-3,
SOT-89, SO-8 and SOT-25
n Applications
l Adjustable power supplies
l Linear regulators
l Battery operated computer
l Portable electronics
l Instrumentation
l Switching power supply
l Mother board
l LCD monitor
l Note book computer
1





 AME431B
www.DataSheet4U.com
AME, Inc.
AME431B
n Typical Applications
VIN
Adjustable Precision Shunt Regulator
Shunt Regulator
R3
VOUT
R1
VREF
VO=(1+R1/R2) VREF
AME431B
R2
High Current Shunt Regulator
R1
VIN
VOUT
R2
VREF
R3
R4
VO=(1+R2/R3) VREF
AME431B
Current Source or Current Limit
R2
VIN IOUT
R1 IOUT=VREF/R2+IKA
AME431B
2





 AME431B
www.DataSheet4U.com
AME, Inc.
AME431B
n Typical Applications (contd.)
Adjustable Precision Shunt Regulator
Precision 5V 1.5A Regulator
VIN
R1
8.2K
AME1117
Adjust
VOUT
5V, 1.5A
R2
250
AME431B
R3
250
Precision 5V 1.5A Regulator
C1
R1
COMP
PWM
Controller
VFB
R2
680
U2
3
4
R3 R4
R5
C2
Q1
2
AME431B
VOUT
R6
PS521
3



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