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LT3970EMS-PBF Datasheet(PDF) 6 Page - Linear Technology

Part # LT3970EMS-PBF
Description  40V, 350mA Step-Down Regulator with 2.5關A Quiescent Current and Integrated Diodes
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3970EMS-PBF Datasheet(HTML) 6 Page - Linear Technology

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LT3970/LT3970-3.3/LT3970-5
6
3970fa
TYPICAL PERFORMANCE CHARACTERISTICS
Power Good Threshold
Boost Diode Forward Voltage
Catch Diode Forward Voltage
Catch Diode Leakage
TA = 25°C, unless otherwise noted.
BOOST DIODE CURRENT (mA)
0
0
0.2
0.4
0.6
0.8
1.0
1.2
50
100
150
200
3970 G19
–50°C
25°C
125°C
150°C
CATCH DIODE CURRENT (mA)
0
0.6
0.8
1.0
400
3970 G20
0.4
0.2
0
100
200
300
–50°C
25°C
125°C
150°C
TEMPERATURE (°C)
–50
12
16
20
25
75
150
3970 G21
8
4
0
–25
0
50
100 125
VR = 12V
TEMPERATURE (°C)
–50
88
89
90
91
92
–25
0
25
50
3970 G22
75
100 125 150
BOOST Pin Current
Minimum Input Voltage,
VOUT = 3.3V
Minimum Input Voltage,
VOUT = 5V
SWITCH CURRENT (mA)
0
10
12
14
16
400
3970 G16
8
6
100
200
300
500
4
2
LOAD CURRENT (mA)
050
2.5
3.5
5.0
100
200
250
3970 G17
3.0
4.5
4.0
150
300
350
FRONT PAGE APPLICATION
VOUT = 3.3V
TO START/RUN
LOAD CURRENT (mA)
050
4.0
5.0
6.5
100
200
250
3970 G18
4.5
6.0
5.5
150
300
350
FRONT PAGE APPLICATION
VOUT = 5V
TO START
TO RUN
Switch VCESAT (ISW = 200mA)
vs Temperature
Switch VCESAT
TEMPERATURE (°C)
–50
100
150
200
250
–25
0
25
50
3970 G14
75
100 125 150
SWITCH CURRENT (mA)
0
300
400
400
3970 G15
200
100
0
100
200
300
500


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