Datasheet

LT3742
22
3742fa
Typical applicaTions
5V and 3.3V Dual Step-Down Converter
Efficiency vs Load Current
V
OUT1
3.3V
4A
V
IN
14V
V
IN
PG1
619Ω
348k
130k
1µF
10µF 10µF
L1
3.3µH
L2
4.7µH
10mΩ 10mΩ
220µF
680pF 68pF
D1, D2: DIODES INC. PDS1040
L1: VISHAY IHLP2525CZER3R3
L2: VISHAY IHLP2525CZER4R7
L3: COILCRAFT: ME3220-223KL
M1, M2: VISHAY Si7848DP-T1-E3
1nF 1nF
200Ω
51k
V
IN
1.05k
150µF
680pF
3742 TA04a
200Ω
51k
D2
G1
UVLO
V
IN
L3
22µH
2.2µF
SWB
GND
LT3742
BIAS
SW1
SENSE1
+
SENSE1
–
FB1
PG1
RUN/SS1
V
C1
G2
SW2
SENSE2
+
SENSE2
–
FB2
PG2
RUN/SS2
V
C2
V
OUT2
5V
4A
PG2
LOAD CURRENT (A)
0
EFFICIENCY (%)
70
80
4
3742 TA04b
60
50
1
2
3
90
5V
OUT
3.3V
OUT