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AME431B

Analog Microelectronics
Part Number AME431B
Manufacturer Analog Microelectronics
Description Adjustable Precision Shunt Regulator
Published Aug 1, 2009
Detailed Description www.DataSheet4U.com AME, Inc. AME431B Adjustable Precision Shunt Regulator n General Description The AME431B series IC...
Datasheet PDF File AME431B PDF File

AME431B
AME431B

Overview
www.
DataSheet4U.
com AME, Inc.
AME431B Adjustable Precision Shunt Regulator 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 output 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 reference 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.
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.
2Ω typical 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 l l l l Instrumentation Switching power supply Mother board LCD monitor Note book computer 1 www.
DataSheet4U.
com AME, Inc.
AME431B Adjustable Precision Shunt Regulator n Typical Applications Shunt Regulator R3 VIN VOUT R1 VREF VO=(1+R1/R2) VREF AME431B R2 High Current Shunt Regulator R1 VOUT R4 R2 VO =(1+R2/R3) VREF VREF AME431B R3 VIN Current Source or Current Limit VIN R2 IOUT R1 IOUT =VREF/R2+IKA AME431B 2 www.
DataSheet4U.
com AME, Inc.
AME431B Adjustable Precision Shunt Regulator n Typical Applications (contd.
) Pr...


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