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SC174 датащи(PDF) 4 Page - Semtech Corporation

номер детали SC174
подробное описание детали  4A EcoSpeedTM Synchronous Step-Down Regulator with Optional Ultrasonic Power Save
PDF  27 Pages
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производитель  SEMTECH [Semtech Corporation]
домашняя страница  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC174 датащи(HTML) 4 Page - Semtech Corporation

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© 2010 Semtech Corporation
Electrical Characteristics (continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Soft start
Soft start Time(1)
Delay from PWM Switching to Output
Regulation
850
μs
Ultrasonic Power Save
Zero-Crossing Detector Threshold
LX - PGND
0
mV
Ultrasonic Power Save Frequency
25
kHz
Power Good
Power Good Threshold
Power Good Signal Threshold High
116
120
124
%V
OUT
Power Good Signal Threshold Low
86
90
93
PGOOD Delay Time(1)
VDD=3V
1
ms
VDD=5V
2
Noise Immunity Delay Time
5
µs
Leakage
1
µA
Power Good On-Resistance
10
20
Ω
Fault Protection
Output Under-Voltage Fault
FB with Respect to REF,
8 Consecutive Clocks
-30
-25
-20
%
Output Over-Voltage Fault
FB with Respect to REF
+16
+20
+24
%
Smart PowerSave
Protection Threshold
FB with Respect to REF
+7
+10
+13
%
OV, UV Fault Noise Immunity Delay
5
μs
Over-Temperature Shutdown
OT Latched
150
°C
Enable/Power Save
Output Enabled
1
V
Output Disabled
0.4
V
EN/PSV Input Bias Current
EN/PSV = VDD or 0V
0.5
8.0
μA
Power Save Enabled
60
%V
DD
Forced Continuous Conduction Mode
EN/PSV floating
39
41
44
%V
DD
Unless specified: V
IN =5V, TA=+25°C for Typ, -40°C to +85°C for Min and Max, TJ < 125°C
4
SC174



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