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SC418 데이터시트(PDF) 4 Page - Semtech Corporation

부품명 SC418
상세설명  EcoSpeedTM DC-DC Buck Controller with Programmable LDO
PDF  30 Pages
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제조업체  SEMTECH [Semtech Corporation]
홈페이지  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC418 데이터시트(HTML) 4 Page - Semtech Corporation

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SC418
4
Electrical Characteristics (continued)
Parameter
Conditions
Min
Typ
Max
Units
Input Supplies (continued)
VDDA + VDDP Supply Current
ENL , EN = 0V
3
7
μA
EN = 5V, R
PSV = 115kΩ, VFB > 500mV
(2)
1.5
mA
EN = 5V, PSV = open (float), V
FB > 500mV
(2)
0.4
Operating f
SW = 250kHz, PSV = VDDA, no load
(2)
10
FB Comparator Threshold
Static VIN and load, 0 to +85 °C
0.496
0.500
0.504
V
Static VIN and load, -40 to +85 °C
0.495
0.505
V
Frequency Range
Continuous mode operation
1000
kHz
Timing
On-Time
Forced continuous mode operation,
V
IN = 15V, VOUT = 5V, RTON = 300kΩ, VDDA = 5V
2385
2650
2915
ns
VDDA < 4.5V (3)
Minimum On-Time (2)
80
ns
Minimum Off-Time(2)
250
ns
Ultrasonic Frequency(2)
Minimum switching frequency, R
PSV = 115kΩ
25
kHz
Soft-Start
Soft-Start Ramp Time(2)
V
OUT ramp from zero to programmed value
850
μs
Analog Inputs/Outputs
VOUT Input Resistance
500
kΩ
Current Sense
Zero Cross Detector Threshold
LX - PGND, VDDA = 5V
-3
0
+3
mV
VDDA = 3.3V(4)
n/a
n/a
n/a
Power Good
Power Good Threshold
Upper limit, V
FB > internal 500mV reference
+20
%
Lower limit, V
FB < internal 500mV reference
-10
%
Start-Up Delay Time
Includes Soft-Start Ramp Time, VDDA = 5V,
2
ms
Includes Soft-Start Ramp Time, VDDA = 3.3V (2)
1
Fault (noise immunity) Delay Time(2)
5
µs
Leakage
PGOOD = high impedance (open)
1
µA



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