SC508 Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
componentes Descripción
Fabricante
SC508 Datasheet PDF : 32 Pages
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SC508/SC508A
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
Ultrasonic Frequency
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
Ultrasonic Power-save operation
EN = 5V, RPSV = 115kΩ, 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
2.4
mA
13
0.5952 0.600 0.6048 V
0.594
0.606
V
1000 kHz
Forced Continuous Mode operation
VIN = 30V, VOUT = 3 V, RTON = 600kΩ, VDDA = 5V
1530 1700 1870 ns
On-time Accuracy; Forced Continuous Mode
±15
%
VIN = 4.5 to 10V, VOUT = 3 V, RTON = 600kΩ, VDDA = 5V
80
ns
250
ns
Minimum switching frequency, RPSV = 115kΩ
25
kHz
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
PGOOD = high impedance (open)
PGOOD = pulled low to AGND
+20
%
-10
11
ms
5
µs
1
µA
10
Ω
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