1A LOW DROPOUT LINEAR REGULATOR CJA1117B-XXX
GENERAL DESCRIPTION
The CJA1117B-XXX is a series of low dropout three-terminal regulators with a dropout of 1.15V(typ.)
at 1A output current.
The CJA1117B-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 CJA1117B-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 1.8V, 2.5V, 3.3V, 5V z Operation Junction Temperature: 0℃ to 125℃ 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 PACKAGE AND PIN CONFIGURATIONS C,Sep,2013
SOT – 89-3L 1. ADJ/GND 2. OUTPUT 3.IN ORDERING INFORMATION
Package
Operating Junction Temperature Range
Part NO. CJA1117B-ADJ CJA1117B-1.8
SOT-89-3L
0 to 125℃
CJA1117B-2.5 CJA1117B-3.3 CJA1117B-5.0
ABOSLUTE MAXIMUM RATINGS (Ta=25℃ unless otherwise noted)
Parameter Symbol Value Unit Input Voltage
Maximum Junction Temperature Storage Temperature
Thermal Resistance from Junction to Ambient
Vi Tj
20 V 150
℃ ℃
℃/W ℃V
-55~+150 Tstg
RθJA 250 TL VESD
260 400
Lead Temperature (Soldering, 10sec.) ESD Voltage (Machine Model)
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 Value Unit Input Voltage
Vi Tj
15 V 0~+125
℃
Operating Junction Temperature
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ELECTRICAL CHARACTERISTICS (VIN≤10V, TJ=25℃ unless otherwise specified. )
Parameter Reference Voltage
Symbol VIROC
Part NO. CJA1117B-ADJ
Test conditions
IOUT=10mA, VIN -V=OUT 3.23
Min
Typ
Max
Unit
1.231 1.250 1.269 V
10mA≤IOUT≤1A, 2.75V≤VIN -VOUT ≤13.25 V1.225 1.250 1.275 CJA1117B-1.8
=IOUT=10mA, VIN3.8V 1.773 1.8 1.827 V
10mA≤IOUT≤1A, 3.3V≤VIN ≤12V 1.764 1.8 1.836 =IOUT=10mA, VIN4.5V 2.463 2.5 2.538 V
10mA≤IOUT≤1A, 4V≤VIN ≤12V 2.450 2.5 2.550 =IOUT=10mA, VIN5.3V 3.251 3.3 3.350 V
10mA≤IOUT≤1A, 4.8V≤VIN ≤12V 3.234 3.3 3.366 =IOUT=10mA, VIN7.0V 4.925 5.0 5.075 V
10mA≤IOUT≤1A, 6.5V≤VIN ≤12V 4.9 5.0 5.1 IOUT=10mA, 1.5V≤VIN -VOUT ≤12V 0.035 0.2 % IOUT=10mA, 1.5V≤VIN -VOUT ≤10.2V 1 7 IOUT=10mA, 1.5V≤VIN -VOUT ≤9.5V 1 7 mV
IOUT=10mA, 1.5V≤VIN -VOUT ≤8.7V 1 7 IOUT=10mA, 1.5V≤VIN -VOUT ≤7V 1 10 0.2 0.4 % 7.2 VIN-VOUT=1.5V, 10mA≤IOUT ≤1A
10 mV
13.2 20 CJA1117B-2.5
Output Voltage
VO
CJA1117B-3.3
CJA1117B-5.0 CJA1117B-ADJ CJA1117B-1.8
Line Regulation
LNR
CJA1117B-2.5 CJA1117B-3.3 CJA1117B-5.0 CJA1117B-ADJ CJA1117B-1.8
Load Regulation
LDR
CJA1117B-2.5 CJA1117B-3.3 CJA1117B-5.0
Dropout Voltage Current Limit Adjust Pin Current Minimum Load Current Quiescent Current Ripple Rejection Temperature Stability Long-Term Stability RMS Output Noise (% of VOUT) Thermal
Shutdown Hysteresis
VD Ilimit IL Iq RR
=ΔVREF=1%, IOUT1.0A 1.3 V =VIN-VOUT2V 1 A
60 120 μA 1.5V≤VIN -VOUT ≤12V (ADJ only)
1.7 5 μA
VIN= VOUT+1.25V(ADJ except) 5 10 mA f=120Hz,COUT=22μFTantalum, VIN-VOUT=3V, IOUT=1A
60 75 dB 0.5 % TA=125℃, 1000hrs 0.3 % TA=25℃, 10Hz≤f ≤10kHz
0.003 % 25 ℃
* With package soldering to copper area over backside ground plane or internal power plane RθJA can vary from 46 ℃/W to >90℃/W depending on mounting technique and the size of the copper area
C,Sep,2013
FUNCTIONAL BLOCK DIAGRAM
TYPICAL APPLICATION CIRCUIT
C,Sep,2013
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