JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD
1A LOW DROPOUT LINEAR REGULATOR
CJT1117B-XXX
FEATURES
Low Dropout Voltage: 1.15V(typ.) at 1A Output Current
Trimmed Current Limit
On-Chip Thermal Shutdown
Three-Terminal Adjustable or Fixed 1.25V,1.8V, 2.5V, 3.3V, 5V
Operation Junction Temperature:
-25℃
to125℃
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, that can provide the output voltage from 1.25V to 5V with
only 2 external resistors.
APPLICATIONS
PC Motherboard
LCD Monitor
Graphic Card
DVD-Video Player
NIC/Switch
Telecom Modem
ADSL Modem
Printer and Other Peripheral Equipment
MARKING
1. ADJ/GND
2. OUTPUT
3.IN
SOT –223
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MAXIMUM RATINGS
ORDERING INFORMATION
Package
Operating Junction Temperature Range
Part NO.
CJT1117B-ADJ
CJT1117B-1.8
SOT-223
-25
to 125℃
CJT1117B-2.5
CJT1117B-3.3
CJT1117B-5.0
ABOSLUTE MAXIMUM RATINGS (T
a
=25℃ unless otherwise noted)
Parameter
Input Voltage
Thermal Resistance from Junction to Ambient
Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10s)
ESD Voltage (Machine Model)
Symbol
V
i
R
θJA
T
j
T
stg
T
L
V
ESD
Value
20
100
150
-55~+150
260
400
Unit
V
℃/W
℃
℃
℃
V
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
Input Voltage
Operating Junction Temperature
Symbol
V
i
T
j
Value
15
-25~+125
Unit
V
℃
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ELECTRICAL CHARACTERISTICS
V
IN
≤10V,
T
J
=25℃ unless otherwise specified.
Parameter
Reference Voltage
Symbol
V
IROC
Part NO.
CJT1117B-ADJ
Test
conditions
Min
1.231
1.225
1.773
1.764
2.463
2.450
3.251
3.234
4.925
4.9
Typ
1.250
1.250
1.8
1.8
2.5
2.5
3.3
3.3
5.0
5.0
Max
1.269
1.275
1.827
1.836
2.538
2.550
3.350
3.366
5.075
5.1
0.2
7
7
7
10
0.4
7.2
V
IN
-V
OUT
=1.5V, 10mA≤I
OUT
≤1A
10
13.2
20
ΔV
REF
=1%, I
OUT
=1.0A
60
I
L
I
q
RR
1.5V≤V
IN
-V
OUT
≤12V
(ADJ only)
V
IN
= V
OUT
+1.25V (ADJ except)
f=120Hz,C
OUT
=22μFTantalum, V
IN
-V
OUT
=3V,
I
OUT
=1A
60
75
0.5
T
A
=125
℃
, 1000hrs
T
A
=25
℃
, 10Hz≤f
≤10kHz
0.3
0.003
25
1.7
1.3
120
5
10
V
μA
μA
mA
dB
%
%
%
℃
mV
%
mV
%
V
Unit
V
I
OUT
=10mA, V
IN
=3.23V
10mA≤I
OUT
≤1A,
2.75V≤V
IN
-V
OUT
≤13.25V
I
OUT
=10mA, V
IN
=3.8V
10mA≤I
OUT
≤1A,
3.3V≤V
IN
≤12V
I
OUT
=10mA, V
IN
=4.5V
10mA≤I
OUT
≤1A,
4V≤V
IN
≤12V
I
OUT
=10mA, V
IN
=5.3V
10mA≤I
OUT
≤1A,
4.8V≤V
IN
≤12V
I
OUT
=10mA, V
IN
=7.0V
10mA≤I
OUT
≤1A,
6.5V≤V
IN
≤12V
I
OUT
=10mA, 1.5V≤V
IN
-V
OUT
≤12V
I
OUT
=10mA, 1.5V≤V
IN
-V
OUT
≤10.2V
I
OUT
=10mA, 1.5V≤V
IN
-V
OUT
≤9.5V
I
OUT
=10mA, 1.5V≤V
IN
-V
OUT
≤8.7V
I
OUT
=10mA, 1.5V≤V
IN
-V
OUT
≤7V
CJT1117B-1.8
CJT1117B-2.5
Output Voltage
V
O
CJT1117B-3.3
CJT1117B-5.0
CJT1117B-ADJ
CJT1117B-1.8
Line Regulation
LNR
CJT1117B-2.5
CJT1117B-3.3
CJT1117B-5.0
CJT1117B-ADJ
CJT1117B-1.8
Load Regulation
LDR
CJT1117B-2.5
CJT1117B-3.3
CJT1117B-5.0
Dropout Voltage
Adjust Pin Current
Minimum
Load Current
Quiescent Current
Ripple Rejection
Temperature Stability
Long-Term Stability
RMS Output
Noise
(% of VOUT)
Thermal
Shutdown Hysteresis
V
D
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FUNCTIONAL BLOCK DIAGRAM
TYPICAL APPLICATION CIRCUIT
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SOT-223 Package Outline Dimensions
Symbol
A
A1
A2
b
b1
c
D
E
E1
e
L
θ
Dimensions In Millimeters
Min.
Max.
——
1.800
0.020
0.100
1.500
1.700
0.660
0.840
2.900
3.100
0.230
0.350
6.300
6.700
6.700
7.300
3.300
3.700
2.300(BSC)
0.750
——
0°
10°
Dimensions In Inches
Min.
Max.
——
0.071
0.001
0.004
0.059
0.067
0.026
0.033
0.114
0.122
0.009
0.014
0.248
0.264
0.264
0.287
0.130
0.146
0.091(BSC)
0.030
——
0°
10°
SOT-223 Suggested Pad Layout
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