Datasheet

LT3759
27
3759fc
For more information www.linear.com/3759
TYPICAL APPLICATIONS
1.8V to 5V Input, 3.3V/3A Output SEPIC Converter
Efficiency vs Output Current Load Step Response at V
IN
= 2.5V
V
OUT
500mV/DIV
(AC)
I
OUT
1A/DIV
3759 TA04c
500µs/DIV
2.5A
0.5A
OUTPUT CURRENT (A)
0.001
EFFICIENCY (%)
60
80
100
1
3759 TA04b
40
0.01 0.1
10
10
20
30
50
70
90
0
V
IN
= 2.5V
SENSE
LT3759
V
IN
DRIVE
V
IN
1.8V TO 5V
C
IN
47µF
10V
27.4k
300kHz
C
DC
4.7µF
10V, X5R, ×2
GATE
PGOOD
FBX
GND
INTV
CC
EN/UVLO
SYNC
RT
SS
VC
L1A
L1B
I
L1A
V
SW
I
L1B
59k
124k
0.1µF
3.01k
22nF
15.8k
1%
16.9k
1%
0.004Ω
1W
4.7µF
10V
X5R
V
OUT
3.3V
2A, 1.8V ≤ V
IN
≤ 3V
3A, 3V < V
IN
≤ 5V
C
OUT
100µF
6.3V
X5R
×3
3759 TA04a
D1
M1
10k
M1: VISHAY Si7858BDP
L1A, L1B: COILTRONICS DRQ127-4R7
D1: VISHAY 6CWQ06FN
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