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LT3757 Datasheet(PDF) 21 Page - Linear Technology

Part # LT3757
Description  Wide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3757 Datasheet(HTML) 21 Page - Linear Technology

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LT3959
21
3959f
TYPICAL APPLICATIONS
2.5V to 24V Input, 12V Output SEPIC Converter
DRIVE
LT3959
L1A
L1B
VIN
VC
SW
D1
L1A, L1B: COILTRONICS DRQ127-150
D1: VISHAY 6CWQ06FN
GND
FBX
RT
SS
INTVCC
EN/UVLO
SYNC
TIE TO SGND IF
NOT USED
PGOOD
SGND
3959 TA03
124k
121k
150k
7.5k
4.7μF
27.4k
300kHz
22nF
0.1μF
105k
15.8k
GNDK
4.7μF
50V
VOUT
12V
500mA AT VIN = 2.5V
1.5A AT VIN > 8v
VIN
2.5V TO 24V
CIN
22μF
50V
×2
COUT1
47μF
16V
X5R
×2
Efficiency vs Output Current
Load Step Response at VIN = 12V
Frequency Foldback Waveforms
When Output Short-Circuits
OUTPUT CURRENT (mA)
0
90
100
800
3759 TA03b
80
400
200
600
1000
65
70
75
85
95
60
VIN = 12V
500μs/DIV
VOUT
500mV/DIV
(AC)
IOUT
500mA/DIV
0.2A
0.8A
3959 TA03c
500μs/DIV
VOUT
10V/DIV
VSW
20V/DIV
IL1A+L1B
2.5A/DIV
3959 TA03d



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