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LT1933 Datasheet(PDF) 4 Page - Linear Technology

Part # LT1933
Description  600mA, 500kHz Step-Down Switching Regulator in SOT-23
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1933 Datasheet(HTML) 4 Page - Linear Technology

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LT1933
1933f
TYPICAL PERFOR A CE CHARACTERISTICS
Frequency Foldback
Soft-Start
SHDN Pin Current
Typical Minimum Input Voltage
Typical Minimum Input Voltage
Operating Waveforms
Operating Waveforms,
Discontinuous Mode
FB PIN VOLTAGE (V)
0.0
700
600
300
100
400
500
200
0
0.5
1933 G10
1.0
1.5
TA = 25°C
SHDN PIN VOLTAGE (V)
0
1.4
1.2
0.6
0.2
0.8
1.0
0.4
0
1
1933 G11
234
TA = 25°C
DC = 30%
0
200
150
50
100
0
4
1933 G12
812
16
SHDN PIN VOLTAGE (V)
TA = 25°C
Switch Current Limit
TEMPERATURE (°C)
–50
1.4
1.2
1.0
0.6
0
0.2
0.8
0.4
–25
0
25
1933 G15
50
75
100
125
LOAD CURRENT (mA)
5
6
7
8
1933 G13
4
VOUT = 5V
TA = 25°C
L = 33µH
TO START
TO RUN
1
10
100
LOAD CURRENT (mA)
4.5
5.0
5.5
6.0
1933 G14
3.0
3.5
4.0
VOUT = 3.3V
TA = 25°C
L = 22µH
TO START
TO RUN
1
10
100
VSW 10V/DIV
IL 200mA/DIV
VOUT 10mV/DIV
VIN = 12V, VOUT = 3.3V, IOUT = 400mA,
L = 22µH, COUT = 22µF
1933 G16
VSW 10V/DIV
IL 200mA/DIV
VOUT 10mV/DIV
VIN = 12V, VOUT = 3.3V, IOUT = 20mA,
L = 22µH, COUT = 22µF
1933 G16



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