
Rev. 10/11/00
AS2840
4A Low Dropout Voltage Regulator
Adjustable & Fixed 3.3V
FEATURES
Adjustable Output Down To 1.25V Or Fixed 3.3V
Powering Intel Pentium
μ
P from +5V Supplies
Output Current Of 4A
Low Dropout Voltage
Extremely Tight Load And Line Regulation
Current & Thermal Limiting
Standard 3-Terminal Low Cost TO-220
PRODUCT DESCRIPTION
The AS2840 is a low power 4A Adjustable Voltage Regulator that is very easy to use. It requires only 2 external resistors to set the
output voltage. This device is an excellent choice for use in Powering Intel
Microprocessor to convert from +5V to 3.3V supplies
and as a post regulator for switching supplies applications. The AS2840 features low dropout of a maximum 1.3 volts.
The AS2840 offers over-current limit and full protection against reversed input polarity, reversed load insertion, over temperature
operation, and positive and negative transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The I
Q
of this device
flows in to the load, which increases the efficiency.
The AS2840 is offered in a 3-pin TO-220 package compatible with other 3 terminal regulators. For a 3A low dropout regulator refer
to the AS2830 data sheet.
ORDERING INFORMATION
TO-220
3-PIN
AS2840AU
Consult with factory for other fixed output voltages.
PIN CONNECTIONS
APPLICATIONS
Power PC
Supplies
SMPS Post-Regulator
High Efficiency “Green” Computer Systems
High Efficiency Linear Power Supplies
Portable Instrumentation
Constant Current Regulators
Adjustable Power Supplies
Battery Charger
Front View
TO-220-3 (U)
AS2840
1
2
3
ADJ/GND V
OUT
V
IN