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SC21150ACSTRT Datasheet(PDF) 5 Page - Semtech Corporation

Part # SC21150ACSTRT
Description  Tiny 1.2A Synchronous Buck Regulator
PDF  20 Pages
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC21150ACSTRT Datasheet(HTML) 5 Page - Semtech Corporation

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SC21150
5
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Output Voltage Range
Vout
Adjustable Vout
0.8
VIN
V
Output Voltage Line Regulation
dVline
5.5V > VIN > (Vout +), PWM operation
0.7
%/V
Output Voltage Load Regulation
dVload
500mA < ILOAD < .2A
-0.3
%/A
Maximum Output Current
IOUT
Continuous current
.2
A
Soft Start
Soft Start Time ()
TSS
FB: from LX rising edge to
95% of final value
00
μs
LX Switching Node
On Resistance High-side
Rdson_hs
FB = 0V; ILX = 500mA
60
mΩ
On Resistance Low-side
Rdson_ls
FB = VIN; ILX = 500mA
20
mΩ
LX Leakage Current High Side
ILX_hs
FB = VIN = 5.5V; VLX = 0V
-.5
-0.
μA
LX Leakage Current Low Side
ILX_ls
FB = 0V; VLX = VIN = 5.5V;
Vout Automatic Discharge disabled
0.

μA
LX Pulldown Current()
ILX_pd
EN = 0V; VLX = V;
Vout Automatic Discharge enabled
20
mA
Switching Frequency()
Fsw
4MHz option, PWM operation, 500mA load,
adjustable output, Vout = 2.5V
3.6
4.0
4.4
MHz
Current Sense
High Side Current Limit
ILIMhs
Current from VIN to LX
.5
2.2
3.0
A
Low Side Current Limit
ILIMls
Current from LX to GND
-0.8
A
Zero Cross Detector Threshold
Ithzcpfm
Power Save Mode and DC Test condition
0
mA
Thermal Protection
Over-Temperature Shutdown
Tts_rise
Rising temperature
60
°C
Over-Temperature Hysteresis
Tts_hyst
0
°C
EN Input
EN Input High Threshhold
VIHen
.2
V
EN Input Low Threshhold
VILen
0.4
V
EN Input High Current
IIHen
VEN = VIN
-
μA
EN Input Low Current
IILen
VEN = 0V

μA
Electrical Characteristics (continued)



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