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LT3640EUFD Datasheet(PDF) 7 Page - Linear Technology

Part # LT3640EUFD
Description  Dual Monolithic Buck Regulator with Power-On Reset and Watchdog Timer
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3640EUFD Datasheet(HTML) 7 Page - Linear Technology

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LT3640
7
3640p
TYPICAL PERFORMANCE CHARACTERISTICS
Full Frequency Waveforms
PFM Operation Waveforms
TA = 25°C, unless otherwise noted.
Watchdog Upper Boundary
Period vs CWDT
Watchdog Upper Boundary
Period vs Temperature
RST/WDO Pull-Up Current
200ns/DIV
SW1
10V/DIV
IL1
0.5A/DIV
SW2
5V/DIV
IL2
0.5A/DIV
3640 G18
VIN1 = 12V
VOUT1 = 3.3V/0.5A
VIN2 = VOUT1
VOUT2 = 1.8V/0.5A
200ns/DIV
SW1
10V/DIV
IL1
0.5A/DIV
SW2
5V/DIV
IL2
0.5A/DIV
3640 G19
VIN1 = 12V
VOUT1 = 3.3V/25mA
VIN2 = VOUT1
VOUT2 = 1.8V/30mA
CWDT CAPACITANCE (pF)
0
120
140
160
100
80
2000
1000
3000
4000
5000
20
0
60
180
40
3640 G20
TEMPERATURE (°C)
–50
20
25
30
15
10
50
0
100
150
5
0
35
3640 G21
RST/WDO VOLTAGE (V)
0
1
0.5
1.5
2
3640 G22
0
10
20
5
15



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