sc1402 Semtech Corporation, sc1402 Datasheet - Page 3

• Manufacturer Part Number: sc1402
• Description: Multi-output, Low-noise Power Supply Controller For Notebook Computers
• Manufacturer: Semtech Corporation

© 2000 SEMTECH CORP.
ELECTRICAL CHARACTERISTICS (continued)
(Unless otherwise noted: (V+ = 15V, both PWMs on, SYNC = VL, VL load = 0mA, REF load = 0mA, PSAVE = 0V, T
Typical values are at T
SYNC Input High Pulse
SYNC Input Low Pulse Width
SYNC Rise/Fall Time
SYNC Input Frequency Range
Current-Sense Input Leakage
Current
FLYBACK CONTROLLER
VDD Shunt Threshold
VDD Shunt Sink Current
VDD Leakage Current
12V LINEAR REGULATOR
12OUT Output Voltage
12OUT Current Limit
12OUT Regulation Threshold
Quiescent VDD Current
INTERNAL REGULATOR AND REFERENCE
VL Output Voltage
Undervoltage Fault Lockout
Threshold
Switchover Threshold
REF Output Voltage
REF Load Regulation
REF Sink Current
REF Fault Lockout Voltage
V+ Operating Supply Current
V+ Standby Supply Current
V+ Shutdown Supply Current
Quiescent Power Consumption
December 15, 2000
PARAMETER
A
= +25°C).
2
2
2
V+ = 6V to 30V, SMPS off, includes current into
SHDN = V+, 6V < V+ < 30V, 0mA < ILOAD <
CSL3 = CSH 3 = 3.5V, CSL5 = CSH5 = 5.5V
VL switched over to CSL5, 5V SMPS on
VDD = 18V, run mode, no 12OUT load
CSL3 = CSH3 = CSL5 = CSH5 = 5.5V
50mA, RUN/ON3 = TIME/ON5 = 0V
12OUT forced to 11V, VDD = 13V
SMPS enabled, FB3 = FB5 = 0V,
No external load, Standby Mode
Falling edge, hysteresis = 0.9V
Multi-Output, Low-Noise Power Supply
Controller for Notebook Computers
Rising edge, hysteresis = 1%
V+ = 6V to 30V, SHDN = 0V
VDD = 5V , Standby mode
0mA < Load < 120mA
Switch over at startup
0mA < LOAD < 5mA
0µA < LOAD < 50µA
CONDITIONS
V+ = VL = 0V,
Falling edge
Falling edge
VDD = 20V
Table 2
SHDN
652 MITCHELL ROAD
NEWBURY PARK CA 91320
11.55
MIN
2.45
300
300
240
4.6
3.5
1.8
18
5
TYP
0.01
12.1 12.50
11.9
A
180
150
3.7
4.5
2.5
7.5
10
50
10
10
= -40 to +85°C
4
MAX UNITS
2.55
12.5
200
350
100
5.2
4.0
2.2
10
20
30
30
50
50
20
SC1402
mW
kHz
mA
mA
mV
µA
µA
µA
µA
µA
ns
V
V
V
V
V
3