SC461 데이터 시트보기 (PDF) - Semtech Corporation
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SC461 Datasheet PDF : 31 Pages
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SC461
Electrical Characteristics (continued)
Parameter
Input Supplies (continued)
VDDA + VDDP Supply Current(2)
FB Comparator Threshold
Frequency Range
Timing
On-Time
Minimum On-Time
Minimum Off-Time
Soft-Start
Soft-Start Charge Current
Analog Inputs/Outputs
VOUT Input Resistance
Current Sense
Zero Cross Detector Threshold
Power Good
Power Good Threshold
Startup Delay Time
Fault (noise immunity) Delay Time
Leakage
Power Good On-Resistance
Conditions
Min Typ Max Units
ENL , EN = 0V
Power-save operation
EN = 5V, PSV = open (float), VFB > 600mV
Forced Continuous Mode operation
Operating fSW = 220kHz, PSV = VDDA, no load
Static VIN and load, 0 to +85 °C
Static VIN and load, -40 to +85 °C
Continuous mode operation
3
7
μA
0.4
mA
14
0.5952 0.600 0.6048 V
0.594
0.606
V
1000 kHz
Forced Continuous Mode operation
VIN = 15V, VOUT = 3V, RTON = 300kΩ, VDDA = 5V
1530 1700 1870 ns
80
ns
250
ns
3.0
μA
500
kΩ
LX with respect to PGND
-3
0
+3
mV
Upper limit, VFB > internal 600mV reference
Lower limit, VFB < internal 600mV reference
EN rising edge to PGOOD rising edge, CSS = 10nF,
VDDA = 5V
EN rising edge to PGOOD rising edge, CSS = 10nF,
VDDA = 3V
PGOOD = high impedance (open)
PGOOD = pulled low to AGND
+20
%
-9
12.5
ms
7.5
5
µs
1
µA
9
Ω
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