SC1182(1998) 查看數據表（PDF） - Semtech Corporation
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SC1182
(Rev.:1998)
(Rev.:1998)
Semtech Corporation
SC1182 Datasheet PDF : 12 Pages
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PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1182/3
August 25, 1998
ABSOLUTE MAXIMUM RATINGS
Parameter
VCC to GND
PGND to GND
BST to GND
Operating Temperature Range
Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 seconds
Thermal Impedance Junction to Ambient
Thermal Impedance Junction to Case
ELECTRICAL CHARACTERISTICS
Symbol
VIN
TA
TJ
TSTG
TL
θJA
θJC
Maximum
-0.3 to +7
±1
-0.3 to +15
0 to +70
0 to +125
-65 to +150
300
80
25
Units
V
V
V
°C
°C
°C
°C
°C/W
°C/W
Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = VO; 0mV < (CSp-CSm) < 60mV; LDOV = 11.4V to 12.6V; TA = 25°C
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Switching Section
Output Voltage
Supply Voltage
Supply Current
Load Regulation
Line Regulation
IO = 2A
VCC
VCC = 5.0
IO = 0.8A to 15A
See Note 1.
4.2
7
V
8 15 mA
1
%
0.5
%
Minimum operating voltage
4.2 V
Current Limit Voltage
60 70 80 mV
Oscillator Frequency
180 200 220 kHz
Oscillator Max Duty Cycle
90 95
%
Peak DH Sink/Source Current
BSTH-DH = 4.5V, DH-PGNDH = 2V 1
A
Peak DL Sink/Source Current
Output Voltage Tempco
BSTL-DL = 4.5V, DL-PGNDL = 2V
1
A
30 100 ppm/oC
Gain (AOL)
OVP threshold voltage
VOSENSE to VO
35
dB
120
%
OVP source current
Power good threshold voltage
VOVP = 3.0V
10
mA
88
112 %
Dead time
50 100
ns
Linear Sections
Quiescent current
LDOV = 12V
5 mA
Output Voltage (LDO1 SC1182)
2.475 2.500 2.525 V
Output Voltage (LDO2 SC1182)
1.485 1.500 1.515 V
Reference Voltage (SC1183)
1.252 1.265 1.278 V
Feedback Pin Bias Current (SC1183)
10 uA
Gain (AOL)
Load Regulation
Line Regulation
LDOS (1,2) to GATE (1,2)
IO = 0 to 8A(2)
90
dB
0.3 %
0.3 %
Output Impedance
200
Ω
Notes: (1) See Output Voltage table.
(2) In application circuit.
2
© 1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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