JIANGSU CHANGJING ELECTRONICS TECHNOLOGY CO., LTD
1A LOW DROPOUT LINEAR REGULATOR
GENERAL DESCRIPTION
The CJT1117B-XXX is a series of low dropout three-terminal regulators with a dropout of 1.15V(typ.)
at 1A output current.
The CJT1117B-XXX series provides current limiting and thermal shutdown. Its circuit includes a
trimmed bandgap. reference to assure output volt age accuracy to be within 1.5%. Current limit is trimmed
to ensure specified. output current and controlled short-circuit current. On-chip thermal shutdown
provides protection against any combination of overload and ambient temperature that would create
excessive junction temperature.
The CJT1117B-XXX has an adjustable version, that can provide the output voltage from 1.25V to 5V with
only 2 external resistors.
FEATURES
z Low Dropout Voltage: 1.15V(typ.) at 1A Output Current
z Trimmed Current Limit
z On-Chip Thermal Shutdown
z Three-Terminal Adjustable or Fixed 1.25V,1.8V, 2.5V, 3.3V,
5V
z Operation Junction Temperature: -40℃ to125℃
APPLICATIONS
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
MARKING
1
Rev. - 2.0
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XXX
Lot No.
CJT1117B
CJT1117B = Device code
XXX: output voltage
CJT1117B-XXX
2
ORDERING INFORMATION
Package Operating Junction Temperature Range Part NO.
CJT1117B-ADJ
CJT1117B-1.8
CJT1117B-2.5
CJT1117B-3.3
SOT-223
-40 to 125℃
CJT1117B-5.0
ABOSLUTE MAXIMUM RATINGS (T
a
=25℃ unless otherwise 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 “Recom mended Operating Cond itions” is not implied. Exposure
to “Absolute Maximum Ratings” for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol Value Unit
Input Voltage
V
i
20 V
Thermal Resistance from Junction to Ambient R
θJA
100
℃/W
Operating Junction Temperature
T
j
-40~+125
℃
S torage Temperature
T
stg
-40~+125
℃
ESD Voltage (Machine Model)
V
ESD
400
V
Parameter
Symbol
Value Unit
Input Voltage
V
i
15 V
Operating Junction Temperature
T
j
-40~+125
℃
MAXIMUM RATINGS
2
Rev. - 2.0
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Soldering Temperature & Time
T
solder
260℃,10s
Operating Ambient Temperature
T
A
-40~+85
℃