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SC508 Datasheet(PDF) 4 Page - Semtech Corporation

Part # SC508
Description  EcoSpeed짰 DC-DC Buck Controller with Integrated LDO
PDF  32 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC508 Datasheet(HTML) 4 Page - Semtech Corporation

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SC508/SC508A
4
Electrical Characteristics (continued)
Parameter
Conditions
Min
Typ
Max
Units
Input Supplies (continued)
VDDA + VDDP Supply Current(2)
ENL , EN = 0V
3
7
μA
Power-save operation
EN = 5V, PSV = open (float), V
FB > 600mV
0.4
mA
Ultrasonic Power-save operation
EN = 5V, R
PSV = 115kΩ, VFB > 600mV
2.4
Forced Continuous Mode operation
Operating f
SW = 220kHz, PSV = VDDA, no load
13
FB Comparator Threshold
Static V
IN and load, 0 to +85 °C
0.5952
0.600
0.6048
V
Static V
IN and load, -40 to +85 °C
0.594
0.606
V
Frequency Range
Continuous mode operation
1000
kHz
Timing
On-Time
Forced Continuous Mode operation
V
IN = 30V, VOUT = 3 V, RTON = 600kΩ, VDDA = 5V
1530
1700
1870
ns
On-time Accuracy; Forced Continuous Mode
V
IN = 4.5 to 10V, VOUT = 3 V, RTON = 600kΩ, VDDA = 5V
±15
%
Minimum On-Time
80
ns
Minimum Off-Time
250
ns
Ultrasonic Frequency
Minimum switching frequency, R
PSV = 115kΩ
25
kHz
Soft-Start
Soft-Start Charge Current
3.0
μA
Analog Inputs/Outputs
VOUT Input Resistance
500
kΩ
Current Sense
Zero Cross Detector Threshold
LX with respect to PGND
-3
0
+3
mV
Power Good
Power Good Threshold
Upper limit, V
FB > internal 600mV reference
+20
%
Lower limit, V
FB < internal 600mV reference
-10
Startup Delay Time
EN rising edge to PGOOD rising edge, CSS = 10nF
11
ms
Fault (noise immunity) Delay Time
5
µs
Leakage
PGOOD = high impedance (open)
1
µA
Power Good On-Resistance
PGOOD = pulled low to AGND
10
Ω



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