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LT3437EFE Datasheet(PDF) 5 Page - Linear Technology

Part # LT3437EFE
Description  High Voltage 500mA, 200kHz Step-Down Switching Regulator with 100uA Quiescent Current
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3437EFE Datasheet(HTML) 5 Page - Linear Technology

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LT3437
5
3437f
3437 G16
0
500
450
400
350
300
250
200
150
100
50
TEMPERATURE (
°C)
–50
0
50
75
–25
25
100
125
Supply Current vs Input Voltage
Burst Mode Threshold
vs Input Voltage
Oscillator Frequency
vs FB Voltage
Switch On Voltage (VCESAT)
LOAD CURRENT (mA)
0
200
600
500
200
400
500
3437 G12
100
400
300
100
300
TJ = 125°C
TJ = –40°C
TJ = 25°C
TYPICAL PERFOR A CE CHARACTERISTICS
Minimum Input Voltage
FB VOLTAGE (V)
0
0
50
100
150
0.25
0.50
0.75
3437 G11
1.00
200
250
1.25
INPUT VOLTAGE (V)
0
0
40
100
10
20
30
40
3437 F13
50
200
20
60
80
120
140
160
180
80
60
70
VOUT = 3.3V
LOAD CURRENT (mA)
0
3.0
3.5
4.5
5.0
5.5
400
7.5
3437 G14
4.0
200
100
300
500
6.0
6.5
7.0
5V TO RUN
5V TO START
3.3V TO RUN
3.3V TO START
INPUT VOLTAGE (V)
0
0
200
20
40
50
3437 G15
100
80
60
40
20
120
140
160
180
10
30
60
ENTER
EXIT
VOUT = 3.3V
Minimum On-Time
Boost Current vs Load Current
LOAD CURRENT (mA)
100
6
8
12
11
200
400
3437 G17
7
10
9
300
500
Dropout Operation
INPUT VOLTAGE (V)
2.0
0
3.0
0.5
1.5
2.0
2.5
4.0
4.0
3437 G18
1.0
3.0
2.5
3.5
4.5
3.5
VOUT = 3.3V
ILOAD = 250mA
BOOST DIODE =
DIODES INC B1100
FB VOLTAGE (V)
0
0
10
20
30
0.2
0.4
0.6
0.8
3437 G10
1.0
35
5
15
25
1.2
SOFT-START DEFEATED
Soft-Start Current Threshold
vs FB Voltage



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