AME, Inc.
1
AME4311
Low Voltage Shunt Regulator
n Functional Block Diagram
l Small packages: SOT-23, SOT-25, TO-92
l Low voltage operation, 1.24V
l Tight voltage tolerance --- ±0.5%,±1.0%, ±1.5%
l Wide operating current ------- 80µA to 15mA
l Wide temperature range ----- -40
o
C to +85
o
C
l Low temperature coefficient --100ppm/
o
C(max)
l Excellent transient response
The AME4311 is a low volatge version of the industry
standard 431 shunt regulator. The AME4311 reference is
set to 1.24 volts. The output voltage can be set to any
value between 1.24V and 8V with two external resistors.
(For factory set internal feedback resistors see the
AME4312.) When used with an optocoupler these de-
vices are ideal for isolated 3.3V switching supplies.
Analog Microelectronics offers this part in a TO-92 pack-
age as well as the space saving SOT-23 and SOT-25
packages.
For isolated switching power supplies requiring volt-
ages lower than 2.7V see the AME4315.
l Battery Operating Equipments
l Adjustable Supplies
l Switching Power Supplies
l Error Amplifiers
l Single Supply Amplifier
n General Description
n Features
n Applications
V+
GND
REF
V
R
=1.24
n Pin Configuration
SOT-25
Top View
TO-92
Top View
V+
GND REF
V+ GND REF
SOT-23
Top View
REF V+
GND
l Monitors / VCR / TV
l Personal Computers