Datasheet

LT3757/LT3757A
36
3757afe
For more information www.linear.com/LT3757
 LINEAR TECHNOLOGY CORPORATION 2008
LT 0617 REV E • PRINTED IN USA
www.linear.com/LT3757
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LT3758/LT3758A 100V Flyback, Boost, SEPIC and Inverting Controllers 5.5V ≤ V
IN
≤ 100V, with Small Packages and Powerful Gate Drive
LT3759 40V Flyback, Boost, SEPIC and Inverting Controller 1.6V ≤ V
IN
≤ 42V, with Small Packages and Powerful Gate Drive
LT8300/LT8303 100V Isolated Flyback Converters in SOT-23 Monolithic No-Opto Flybacks with Integrated 240A/500mA Switch
LT8304/LT8304-1 100V Isolated Flyback Converter Monolithic No-Opto Flyback with Integrated 2A Switch, SO-8 Package
LT3748 100V Isolated Flyback Converter 5V ≤ V
IN
≤ 100V, No-Opto Flyback, MSOP-16 with High Voltage Spacing
LT8301/LT8302 42V Isolated Flyback Converters Monolithic No-Opto Flybacks with Integrated 1.2A/3.6A Switch
LT3798 Offline Isolated No Opto-Coupler Flyback Controller
with Active PFC
V
IN
and V
OUT
Limited Only by External Components
LT3799/LT3799-1 Offline Isolated Flyback LED Controller with Active PFC V
IN
and V
OUT
Limited Only by External Components
LT3957A Boost, Flyback, SEPIC and Inverting Converter with 5A,
40V Switch
3V ≤ V
IN
≤ 40V, 100kHz to 1MHz Programmable Operation Frequency,
5mm × 6mm QFN Package
LT3958 Boost, Flyback, SEPIC and Inverting Converter with
3.3A, 84V Switch
5V ≤ V
IN
≤ 80V, 100kHz to 1MHz Programmable Operation Frequency,
5mm × 6mm QFN Package
High Efficiency Inverting Power Supply
Efficiency vs Output Current
OUTPUT CURRENT (A)
0.001
10
EFFICIENCY (%)
20
30
40
50
60
70
80
90
100
0.01
0.1 1
3757 TA09b
10
V
IN
= 16V
V
IN
= 5V
SENSE
LT3757
V
IN
V
IN
5V TO
15V
C
IN
47µF
16V
X5R
C
DC
47µF
25V, X5R
V
OUT
–5V
3A to 5A
0.006Ω
1W
M1
Si7848BDP
41.2k
300kHz
GATE
FBX
GND
INTV
CC
SHDN/UVLO
SYNC
RT
SS
•
•
R2
105k
R1
46.4k
0.1µF
9.1k
10nF
L1
L2
D1
MBRD835L
L1, L2: COILTRONICS DRQ127-3R3 (*COUPLED INDUCTORS)
3757 TA09a
84.5k
16k
C
VCC
4.7µF
10V
X5R
C
OUT
100µF
6.3V, X5R
×2
V
C
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