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SC411 датащи(PDF) 3 Page - Semtech Corporation

номер детали SC411
подробное описание детали  Synchronous Buck Pseudo-Fixed Frequency Power Supply Controller
PDF  27 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC411 датащи(HTML) 3 Page - Semtech Corporation

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© 2007 Semtech Corp.
www.semtech.com
SC411
POWER MANAGEMENT
Parameter
Conditions
25°C
-40°C to 125°C
Units
Min
Typ
Max
Min
Max
Input Supplies (Cont.)
TON Operating Current
R
TON = 1M
15
μA
Shutdown Current
EN/PSV = 0V
-5
-10
μA
VCCA
5
10
μA
VDDP, TON
0
1
μA
Controller
Error Comparator Threshold
(FB Turn-on Threshold)(1)
VCCA = 4.5V to 5.5V
Includes variations of
internal x3 gain stage, com-
parator, and 1.5V REF
0.500
-1.2%
+1.2%
V
Output Voltage Range
0.5
VCCA
V
On-Time, V
BAT = 2.5V
R
TON = 1MΩ
1761
1409
2113
ns
R
TON = 500kΩ
936
749
1123
Minimum Off-Time
400
550
ns
VOUT Input Resistance
500
k
Ω
VOUT Shutdown
Discharge Resistance
EN/PSV = GND
22
Ω
FB Input Bias Current
-1.0
+1.0
μA
Over-Current Sensing
ILIM Source Current
DL high
10
9
11
μA
Current Comparator Offset
PGND - ILIM
-10
10
mV
PSAVE
Zero-Crossing Threshold
(PGND - LX),
EN/PSV = 5V
5mV
Fault Protection
Electrical Characteristics (Cont.)



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