SC1401 Просмотр технического описания (PDF) - Semtech Corporation
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SC1401 Datasheet PDF : 17 Pages
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HIGH PERFORMANCE SYNCHRONOUS BUCK
CONTROLLER WITH LDO FOR PORTABLE
SC1401
POWER
November 21, 2000
ELECTRICAL CHARACTERISTICS (continued)
Unless specified: VDD1 = 12V, VDD2 = 12V V5V = 5V, SHDN = PSAVE = 5V, TA = -40 °C to +85 °C. Typical values are at TA = +25°C.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
FAULT DETECTION
Thermal Shutdown Threshold
Typical hysteresis = +10°V
150
°C
VDD1 Undervoltage Reset
Threshold
Falling edge of VDD1, hysteresis = 1%
4.2
4.5
4.8
V
V5V Undervoltage Reset
Threshold
Falling edge of V5V, hysteresis = 1%
3.75 4.0 4.25
V
FB Overvoltage Reset
With respect to unloaded output voltage, typ.
10
%
Threshold
Hysteresis = 1%
FB Undervoltage Reset
With respect to unloaded output voltage, typ.
-10
%
Threshold
Hysteresis = 1%
RESET Propagation Delay
FB Over/Under Voltage condition
1.5
µs
IOS Undervoltage Reset
With respect to unloaded linear output voltage
-10
%
Threshold
RESET Delay Time
With respect to fOSC
27,000 32,000 37,000 clks
LOGICAL INPUTS AND OUTPUTS
Logic Input High
SHDN,ENABLEIO
1.8
Logic Input Low
PSAVE,SYNC
1.6
V
Input Leakage Current
Logic Output Low Voltage
SHDN,ENABLEIO, PSAVE, SYNC
-1.0
RESET, ISINK = 4mA
1.0
µA
0.4
V
© 2000 SEMTECH CORP.
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