Datasheet

LT3845A
22
3845afa
TYPICAL APPLICATIONS
9V-16V to 5V at 10A DC/DC Converter, 500kHz Frequency Operation,
Capable of Withstanding 36V Transients, All Ceramic Capacitors, Soft-Start and Burst Mode Enabled
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
BG
PGND
SENSE
+
SENSE
–
SGND
D2 BAS19
C5
1µF
16V
C3
8200pF
M1
Si7884DP
M2
Si7884DP
Si1555DL
D1
L1
2.7µH
R
SENSE
0.005Ω
LT3845A
C4
2.2µF
16V
C6
1µF
D3B
BAV99
D3A
BAV99
3845A TA03
C2
5600pF
C1
100pF
C
OUT
100µF
6.3V
×4
V
OUT
5V
10A
R3
1.1M
V
IN
9V TO 16V
36V TRANSIENTS
C
IN2
0.1µF
50V
R6
23.2k
R4
10k
R1
49.9k
R2
154k
C
IN
6.8µF
50V
×4
C
IN
: TDK C4532X7R1H685K
C
OUT
: MURATA GRM32ER60J107ME20
D1: DIODES INC. B170
L1: WURTH 744318270LF
Efficiency and Power Loss
LOAD CURRENT (A)
0.1
70
EFFICIENCY (%)
POWER LOSS (W)
75
80
85
90
100
1 10
3845A TA03b
95
0
1
2
3
4
6
5
V
IN
= 9V
V
IN
= 14V
V
IN
= 16V
POWER LOSS
V
IN
= 14V