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SC411 датащи(PDF) 4 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) 4 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
Current Limit (Positive)(2)
(PGND - LX), R
ILIM = 5kΩ
50
35
65
mV
(PGND - LX), R
ILIM = 10kΩ
100
80
120
mV
(PGND - LX), R
ILIM = 20kΩ
200
170
230
mV
Fault Protection (Cont.)
Current Limit (Negative)
(PGND - LX)
-125
-160
-90
mV
Output Under-Voltage Fault
With respect to internal ref.
-30
-40
-25
%
Output Over-Voltage Fault
With respect to internal ref.
+16
+12
+20
%
Over-Voltage Fault Delay
FB forced above
OV Threshold
5
μs
PGD Low Output Voltage
Sink 1mA
0.4
V
PGD Leakage Current
FB in regulation,
PGD = 5V
1
μA
PGD UV Threshold
With respect to internal ref.
-10
-12
-8
%
PGD Fault Delay
FB forced outside
PGD window
5
μs
VCCA
Under-Voltage Threshold
Falling
(100mV Hysteresis)
4.0
3.7
4.3
V
Over-Temperature Lockout
10°C Hysteresis
165
°C
Inputs/Outputs
Logic Input Low Voltage
EN/PSV Low
1.2
V
Logic Input High Voltage
EN High,
PSV Low (Floating)
2.0
V
Logic Input High Voltage
EN/PSV High
3.1
V
EN/PSV Input Resistance
R Pullup to VCCA
1.5
MΩ
R Pulldown to VSSA
1.0
Electrical Characteristics (Cont.)



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