SC1185A Ver la hoja de datos (PDF) - Semtech Corporation
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SC1185A
Semtech Corporation
SC1185A Datasheet PDF : 12 Pages
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PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1185
SC1185A
PRELIMINARY - January 6, 1999
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
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
ELECTRICAL CHARACTERISTICS
Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = VO; 0mV < (CS+-CS-) < 60mV; LDOV = 11.4V to 12.6V; TA = 0 to 70°C
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Switching Section
Output Voltage
Supply Voltage
IO = 2A in Application Circuit
VCC
See Output Voltage Table
4.5
7
V
Supply Current
VCC = 5.0V
8 15 mA
Load Regulation
Line Regulation
IO = 0.8A to 15A
1
%
±0.15
%
Current Limit Voltage
60 70 85 mV
Oscillator Frequency
125 140 160 kHz
Oscillator Max Duty Cycle
90 95
%
Peak DH Sink/Source Current
BSTH-DH = 4.5V, DH-PGNDH = 3.1V 1
A
DH-PGNDH = 1.5V 100
mA
Peak DL Sink/Source Current
BSTL-DL = 4.5V, DL-PGNDL = 3.1V 1
A
DL-PGNDL = 1.5V 100
mA
Gain (AOL)
VID Source Current
VID Leakage
Power good threshold voltage
Dead time
Linear Sections
Quiescent current
Output Voltage LDO1
Output Voltage LDO2
Reference Voltage
Gain (AOL)
Load Regulation
Line Regulation
Output Impedance
Gate Pulldown Impedance
VOSENSE Impedance
VOSENSE to VO
VIDx ≤ 2.4V
VIDx = 5V
35
dB
1 10
µA
10 µA
88
112 %
40 100
ns
LDOV = 12V
Iref ≤ 100µA
LDOS (1,2) to GATE (1,2)
IO = 0 to 8A
VGATE = 6.5V
GATE(1,2)-AGND;VCC=LDOV=0V
5
mA
2.469 2.500 2.531 V
1.481 1.500 1.519 V
1.246 1.265 1.284 V
90
dB
0.3 %
0.3 %
1 1.5 kΩ
80 300 750 kΩ
10
kΩ
2
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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