Datasheet

LT3957A
28
3957afa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2012
LT 1012 REV A • PRINTED IN USA
TYPICAL APPLICATIONS
PART NUMBER DESCRIPTION COMMENTS
LT3957 Boost, Flyback, SEPIC and Inverting Converter with
5A/40V Switch
3V ≤ V
IN
≤ 40V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, 5mm × 6mm QFN-36 Package
LT3958 High Input Voltage, Boost, Flyback, SEPIC and
Inverting Converter with 3.5A/80V Switch
5V ≤ V
IN
< 80V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, 5mm × 6mm QFN-36 Package
LT3757 Boost, Flyback, SEPIC and Inverting Controller 2.9V ≤ V
IN
≤ 40V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, 3mm × 3mm DFN-10 and MSOP-10E Package
LT3758 Boost, Flyback, SEPIC and Inverting Controller 5.5V ≤ V
IN
≤ 100V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, 3mm × 3mm DFN-10 and MSOP-10E Package
LT3759 Boost, SEPIC and Inverting Controller 1.6V ≤ V
IN
≤ 42V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, MSOP-12E Package
RELATED PARTS
4V to 6V Input, 180V Output Flyback Converter
SENSE2
FBX
SENSE1
LT3957A
T1
1:10
V
IN
SW GND
RT SS
INTV
CC
EN/UVLO
SYNC
SGND
37.4k
V
C
3957A TA05
D1
D2
DANGER! HIGH VOLTAGE!
75k
22Ω
220pF
140k
100kHz
4.7µF
10V
X5R
10nF
0.1µF
10k
10nF
100pF
22Ω
15.8k
1.80M
C
OUT
68nF
w2
V
OUT
180V
15mA
V
IN
4V TO 6V
C
IN
100µF
6.3V
w2
T1: TDK DCT15EFD-U44S003
C
IN
: GRM31CR60J107ME39L
C
OUT
: GRM43QR72J683KW01L
D1: VISHAY SILICONIX GSD2004S DUAL DIODE CONNECTED IN SERIES
D2: DIODES MMSZ5258B
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