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