LT3758 LINER [Linear Technology], LT3758 Datasheet - Page 33

• Manufacturer Part Number: LT3758
• Description: High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
IL
1A +
5V/DIV
2A/DIV
V
IL
100
OUT
40
30
20
10
90
80
70
60
50
1B
0.001
10V TO 40V
Effi ciency vs Output Current
V
IN
= 24V
Start-Up Waveforms
0.01
OUTPUT CURRENT (A)
V
IN
C
C
D1: VISHAY SILICONIX 30BQ060
V
IN
OUT
IN
5ms/DIV
, C
= 10V
: MURATA GRM32ER61C226KE20
DC
0.1
41.2k
300kHz
: MURATA GRM32ER71H475KA88L
C
4.7μF
50V
X7R
x2
IN
V
IN
= 40V
1
V
10V to 40V Input, –12V Output Inverting Converter
IN
R1
200k
R2
32.4k
0.47μF
= 24V
3757 TA07d
3757 TA07b
10
SHDN/UVLO
SYNC
RT
SS
VC
10k
6.8nF
LT3758
V
GND INTV
IN
SENSE
L1A, L1B: COILTRONICS DRQ127-150
M1: VISHAY SILICONIX SI7850DP
GATE
FBX
CC
C
4.7μF
10V
X5R
VCC
L1A
•
1A/DIV
500mV/DIV
M1
IL
0.015Ω
I
OUT
1A +
10V/DIV
20V/DIV
5A/DIV
X7R, x2
4.7μF
V
V
C
50V
(AC)
1.6A
0.4A
V
IL
OUT
OUT
DC
SW
1B
Frequency Foldback Waveforms
V
V
IN
IN
When Output Short-Circuit
= 24V
= 24V
D1
Load Step Waveforms
L1B
500μs/DIV
50μs/DIV
3757 TA07a
105k
7.5k
C
22μF
16V
X5R
x4
OUT
V
-12V
2A
OUT
3757 TA07c
3757 TA07e
LT3758
33
3758f