AiT Semiconductor Inc.
AiT Semiconductor Inc.AiT Semiconductor Inc.
AiT Semiconductor Inc.
www.ait-ic.com
A108
A108A108
A1084
44
4
5A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
THERMAL SHUTDOWN AND CURRENT LIMIT FUNCTIONS
REV1.2 - JUN 2007 RELEASED – SEP 2008 REVISED - - 1 -
DESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
FEATURES
FEATURESFEATURES
FEATURES
The A1084 is a series of low dropout three terminal
regulators with a dropout of 1.4V at 5A load current.
Other than a fixed version (V
OUT
= 1.8V, 2.5V, 3.3V,
5V), The A1084 has an adjustable version, which
can set the output voltage with two external
resistors.
The A1084 offers thermal shutdown and current limit
functions, to assure the stability of chip and power
system.
The A1084 is available in TO-252, TO-263-2 and
TO-263-3 package.
Provide Fixed Version and an Adjustable
Version, Output Value can be customized on
command.
Maximum Output Current: 5A
Range of Operation Input Voltage: Max 15V
Line Regulation: 0.2% (Typ.)
Load Regulation: 0.2% (Typ.)
Environment Temperature: 0
o
C to +80
o
C
Available in TO-252, TO-263-2 and TO-263-3
Package
APPLICATION
APPLICATIONAPPLICATION
APPLICATION
Power Management for Computer Mother
Board, Graphic Card
Battery Charger
Microprocessor Supply
Post Regulators for Switching Supplies
TYPICAL APPLICATION
TYPICAL APPLICATIONTYPICAL APPLICATION
TYPICAL APPLICATION
Adjustable Version
V
OUT
= V
REF
x (1 + R2 / R1) + I
ADJ
x R2
Fixed Output Version
ORDERING INFORMATION
ORDERING INFORMATIONORDERING INFORMATION
ORDERING INFORMATION
P
PP
Package Type
ackage Typeackage Type
ackage Type
P
PP
Part Number
art Numberart Number
art Number
TO-252 D
A1084DR-XX
A1084DVR-XX
TO-263-2 S2
A1084S2R-XX
A1084S2VR-XX
TO-263-3 S3
A1084S3R-XX
A1084S3VR-XX
Note
XX: Output Voltage,
33 = 3.3V, 50 = 5V,
ADJ: Adjustable
R : Tape & Reel
V: Green Package
AiT provides all Pb free products
Suffix “ V “ means Green Package
AiT Semiconductor Inc.
AiT Semiconductor Inc.AiT Semiconductor Inc.
AiT Semiconductor Inc.
www.ait-ic.com
A108
A108A108
A1084
44
4
5A LOW-DROPOUT POSITIVE VOLTAGE REGULATOR
THERMAL SHUTDOWN AND CURRENT LIMIT FUNCTIONS
REV1.2 - JUN 2007 RELEASED – SEP 2008 REVISED - - 2 -
PIN DESCIPTION
PIN DESCIPTIONPIN DESCIPTION
PIN DESCIPTION
Top View
Top View
Top View
Pin
PinPin
Pin
#
##
#
TO
TOTO
TO-
--
-252
252252
252
TO
TOTO
TO-
--
-263
263263
263-
--
-2
22
2
TO
TOTO
TO-
--
-263
263263
263-
--
-3
33
3
A1084DR
A1084DRA1084DR
A1084DR-
--
-XX
XXXX
XX
A1084DR
A1084DRA1084DR
A1084DR-
--
-ADJ
ADJADJ
ADJ
A1084S2R
A1084S2RA1084S2R
A1084S2R-
--
-XX
XXXX
XX
A108
A108A108
A1084S2R
4S2R4S2R
4S2R-
--
-ADJ
ADJADJ
ADJ
A1084S3R
A1084S3RA1084S3R
A1084S3R-
--
-XX
XXXX
XX
A1084S3R
A1084S3RA1084S3R
A1084S3R-
--
-ADJ
ADJADJ
ADJ
1 GND ADJ GND ADJ GND ADJ
2 V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
3 V
IN
V
IN
V
IN
V
IN
V
IN
V
IN
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGSABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
Maximum Input Voltage 15V
Junction Temperature (T
J
) 150
o
C
Environment Temperature (T
A
) 80
o
C
Storage Temperature (Ts) -65
o
C to 150
o
C
Lead Temperature and Time 260
o
C, 10S
Stresses above may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at
these or any other conditions beyond those indicated in the Electrical Characteristics is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.