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 to 125°C
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
1. ADJ / GND
2. OUTPUT
3. IN
MARKING
XXX
Lot No.
CJT1117B
CJT1117B = Device c
ode
XXX: output voltage
2
JIANGSU CHANGJING ELECTRONICS TE
CHNOLOGY CO., LTD
1A LOW DROPOUT LINEAR REGULATOR
CJT1117B-XXX
SOT - 223
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 voltage 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, th at can provide the output voltage from 1.25V to 5V
with only 2 external resistors.
APPLICATIONS
1
Rev. - 2.1
www.jscj-elec.com
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
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
Soldering Temperature & Time
T
solder
260℃,10s
Operating Ambient Temperature
T
A
-40~+85
℃
(T
A
= 25°C, unless otherwise specified)
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
2
Rev. - 2.1
www.jscj-elec.com