LT3957
28
3957f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
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www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2010
LT 0610 • PRINTED IN USA
TYPICAL APPLICATIONS
PART NUMBER DESCRIPTION COMMENTS
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
LT3580 Boost/Inverting DC/DC Converter with 2A Switch, Soft-
Start and Synchronization
2.5V ≤ V
IN
≤ 32V, Current Mode Control, 200kHz to 2.5MHz, 3mm × 3mm
DFN-8, MSOP-8E
LT3573 Isolated Flyback Converter with 1.25A/60V Integrated
Switch
3V ≤ V
IN
≤ 40V, No Opto-Isolator or "Third Winding" Required, Up to 7W,
MSOP-16E
LT3574 Isolated Flyback Converter with 0.65A/60V Integrated
Switch
3V ≤ V
IN
≤ 40V, No Opto-Isolator or “Third Winding” Required, Up to 3W,
MSOP-16
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
LTC1871/LTC1871-1/
LTC1871-7
Wide Input Range, No R
SENSE
™ Low Quiescent Current
Flyback, Boost and SEPIC Controller
Adjustable Switching Frequency, 2.5V ≤ V
IN
≤ 36V, Burst Mode Operation
at Light Load
LTC3803/LTC3803-3/
LTC3803-5
200kHz/300kHz Flyback DC/DC Controller V
IN
and V
OUT
Limited Only by External Components, ThinSOT™ Package
RELATED PARTS
4V to 6V Input, 180V Output Flyback Converter
SENSE2
FBX
SENSE1
LT3957
T1
1:10
V
IN
SW
GND
RT SS
INTV
CC
EN/UVLO
SYNC
SGND
37.4k
VC
3957 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
s2
V
OUT
180V
15mA
V
IN
4V TO 6V
C
IN
100µF
6.3V
s2
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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