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參數(shù)資料
| 型號： | SC1402ISS |
| 廠商： | Semtech Corporation |
| 英文描述： | Multi-Output, Low-Noise Power Supply Controller for Notebook Computers |
| 中文描述： | 多輸出，低噪聲電源控制器，用于筆記本電腦 |
| 文件頁數(shù)： | 3/18頁 |
| 文件大?。?/td> | 270K |
| 代理商： | SC1402ISS |
SC1402
2000 SEMTECH CORP.
652 MITCHELL ROAD
NEWBURY PARK CA 91320
Multi-Output, Low-Noise Power Supply
Controller for Notebook Computers
December 15, 2000
3
Table 2
ELECTRICAL CHARACTERISTICS (continued)
(Unless otherwise noted: (V+ = 15V, both PWMs on, SYNC = VL, VL load = 0mA, REF load = 0mA, PSAVE = 0V, T
A
= -40 to +85°C
Typical values are at T
A
= +25°C).
PARAMETER
CONDITIONS
SYNC Input High Pulse
2
MIN
TYP
MAX UNITS
300
SYNC Input Low Pulse Width
2
SYNC Rise/Fall Time
2
300
ns
200
SYNC Input Frequency Range
240
350
kHz
Current-Sense Input Leakage
Current
V+ = VL = 0V,
CSL3 = CSH3 = CSL5 = CSH5 = 5.5V
0.01
10
μA
FLYBACK CONTROLLER
VDD Shunt Threshold
Rising edge, hysteresis = 1%
18
20
V
VDD Shunt Sink Current
VDD = 20V
5
10
30
mA
VDD Leakage Current
VDD
= 5V , Standby mode
30
μA
12V LINEAR REGULATOR
12OUT Output Voltage
0mA < Load < 120mA
11.55
12.1
12.50
V
12OUT Current Limit
12OUT forced to 11V, VDD = 13V
150
mA
12OUT Regulation Threshold
Falling edge
11.9
V
Quiescent VDD Current
VDD = 18V, run mode, no 12OUT load
50
100
μA
INTERNAL REGULATOR AND REFERENCE
VL
Output Voltage
SHDN = V+, 6V < V+ < 30V, 0mA < ILOAD <
50mA, RUN/ON3 = TIME/ON5 = 0V
4.6
5.2
Undervoltage Fault Lockout
Threshold
Falling edge, hysteresis = 0.9V
3.5
3.7
4.0
V
Switchover Threshold
Switch over at startup
4.5
REF Output Voltage
No external load, Standby Mode
2.45
2.5
2.55
REF Load Regulation
0μA < LOAD
< 50μA
12.5
mV
0mA < LOAD < 5mA
50
REF Sink Current
10
μA
REF Fault Lockout Voltage
Falling edge
1.8
2.2
V
V+ Operating Supply Current
VL switched over to CSL5, 5V SMPS on
10
50
V+ Standby Supply Current
V+ = 6V to 30V, SMPS off, includes current into
SHDN
180
μA
V+ Shutdown Supply Current
V+ = 6V to 30V, SHDN = 0V
4
20
Quiescent Power Consumption
SMPS enabled, FB3 = FB5 = 0V,
CSL3 = CSH 3 = 3.5V, CSL5 = CSH5 = 5.5V
7.5
mW
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