SC1402(2001) 데이터 시트보기 (PDF) - Semtech Corporation
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SC1402
(Rev.:2001)
(Rev.:2001)
Semtech Corporation
SC1402 Datasheet PDF : 18 Pages
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SC1402
POWER MANAGEMENT
Electrical Characteristics (Cont.)
(Unless otherwise noted: V+ = 15V, both PWMs on, SYNC = VL, VL load = 0mA, REF load = 0mA, PSAVE = 0V, TA =-40 to +85°C.
Typical values are at TA = +25°C).
Parameters
Conditions
MIN TYP MAX
Units
INTERNAL REGULATOR AND REFERENCE (Cont.)
Switchover Threshold
Switch over at startup
REF Output Voltage
No external load, Standby mode
4.5
V
2.45
2.5
2.55
V
REF Load Regulation
0µA < LOAD < 50µA
12.5 mV
REF Sink Current
REF Fault Lockout Voltage
V+ Operating Supply Current
V+ Standby Supply Current
V+ Shutdown Supply Current
Quiescent Power Consumption
0mA < LOAD < 5mA
50
10
µA
Falling edge
1.8
2.2
V
VL Switched over to CSL5, 5V SMPS on
10
50
V+ = 6V to 30V, SMPS off, includes
current into SHDN
180
µA
V+ = 6V to 30V, SHDN = 0V
4
20
SMPS enabled, FB3 = FB5 = 0V, CSL3 =
7.5
mW
CSH3 = 3.5V, CSL5 = CSH5 = 5.5V
FAULT DETECTION
Overvoltage Trip Threshold
With respect to unloaded output voltage
3.5
7
10
%
Overvoltage-Fault Propagation Delay
Output Undervoltage Threshold
Output Undervoltage Lockout Time
Thermal Shutdown Threshold
CSL driven 2% above overvoltage trip
threshold
1.5
µs
With respect to unloaded output voltage
60
70
80
%
From each SMPS enabled, with respect to 5000 6144 7000 clks
fOSC
Typical hysteresis = +10°C
150
°C
RESET
RESET Trip Threshold
RESET Propagation Delay
RESET Delay Time
With respect to unloaded output voltage,
-10
-7
-4
%
falling edge; typical hysteresis = 1%
Falling edge, CSL driven 2% below
RESET trip threshold
1.5
µs
Wigh respect to fosc
27.000 32,000 37,000 clks
INPUTS AND OUTPUTS
Logic Input Low Voltage
Logic Input High Voltage
Input Leakage Current
RUN/ON3, PSAVE, TIME/ON5 (SEQ =
REF), SHDN, SYNC
RUN/ON3, PSAVE, TIME/ON5 (SEQ =
2.4
REF), SHDN, SYNC
RUN/ON3, PSAVE, TIME/ON5 (SEQ =
REF), SHDN, SYNC, SEQ = 0V or 3.3V
0.6
V
V
±1
µA
2001 Semtech Corp.
4
www.semtech.com
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