1
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Rev - 1.4
z Low Dropout Voltage: 1.3V(typ.) at 1A Output Current
z Thermal Shutdown
z Three-Terminal Adjustable to 1.2V,1.5V,1.8V, 2.5V, 3.3V, 5V
z Operation Junction Temperature: -40°C to 125°C
z Space-saving SOT-223 packages
z PC Motherboard
z LCD Monitor
z Graphic Card
z DVD-Video Player
z NIC/Switch
z Telecom Modem
z ADSL Modem
z Printer and Other Peripheral Equipment
SOT
-223
1. ADJ/GND
2. OUTPUT
3.IN
JIANGSU CHANGJING ELECTRONICS TECHNOLOGY CO., LTD
1A LOW DROPOUT LINEAR REGULATOR
S
CJT1117B-A Series
FEATURES
MARKING
XXX
Lot No.
CJT1117B
CJT1117B = Device code
XXX: output voltage
GENERAL DESCRIPTION
The SCJT1117B-A series is a group of low dropout three-terminal regulators with a dropout of 1.3V(typ.)
at 1A output current.
The SCJT1117B-A series is available in an adjustable version, which can set the output voltage from
1.25V to 12 V with only two external resistors. In addition, it is available in five fixed voltages: 1.2V, 1.5V,
1.8V, 2.5V, 3.3V and 5V.
The SCJT1117B-A series offer thermal shutdown protection. Its circuit includes a Zener trimmed bandgap
reference to assure output voltage accuracy to within ±2%.
A minimum of 10µF tantalum capacitor is required at the output to improve the transient response and
stability.
APPLICATIONS
ORDERING INFORMATION
Package Operating Junction Temperature Range Part NO.
SCJT1117B-1.5-A
SCJT1117B-1.8-A
SCJT1117B-2.5-A
SOT
-
223
-40 to 125℃
SCJT1117B-3.3-A
ABOSLUTE MAXIMUM RATINGS (T
a
=25℃ unless otherwis
e noted)
Note: Stresses greater than those listed under ”Absolute Maximum Ratings” may cause permanent
damage to the device. These are stress ratings only, and functional of the device at these or any other
conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure
to “Absolute Maximum Ratings” for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol V
alue Unit
Input Vo
ltage
V
i
20 V
Thermal Resist
ance from Junction to Ambient
R
θJA
100
℃/W
Maximum Junction Temperature
T
j
-40~+150
℃
Storage
Temperature
T
stg
-40~+150
℃
Lead T
emperature (Soldering, 10s)
T
L
260
℃
ESD Rating
Human Body Model, HBM
8
kV
Parameter
Symbol
V
alue Unit
Input Vo
ltage
V
i
15 V
Operating Junction Temperature
T
j
-40~+125
℃
2
MAXIMUM RATINGS
SCJT1117B-1.2-A
SCJT1117B-ADJ-A
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SCJT1117B-5.0-A
Operating Ambient Temperature T
A
-40~+85
℃
Rev-1.4