Datasheet

LT3800
21
3800fc
TYPICAL APPLICATIONS
9V-38V to 5V 6A DC/DC Converter with All Ceramic Capacitors, Input UVLO,
Burst Mode Operation and Current Limit Foldback
Effi ciency and Power Loss
V
IN
NC
SHDN
C
SS
BURST_EN
V
FB
V
C
SENSE
–
BOOST
TG
SW
NC
V
CC
BG
PGND
SENSE
+
LT3800
SGND
C1 3.9nF
C9 1nF
C3
100pF
C2
1nF
C6
47pF
R2
154k
1%
R1
49.9k
1%
R5
47k
D2
1N4148
R4 51k
R3
27k
R
A
1M
R
B
187k
R
S
0.02Ω
D1
BAS19
C5 1µF
10V X7R
C4 1µF
10V X7R
C8
22µF
×3
C7
100µF
×2
M1
Si7884DP
M2
Si7884DP
DS1
SS14
L1
10μH
V
IN
9V TO 38V
V
OUT
5V AT 6A
3800 TA05a
C7: TDK C4532X5R0J107MT
C8: TDK C5750X7R1E226MT
L1: IHLP-5050FD-01
I
LOAD
(A)
70
EFFICIENCY (%)
POWER LOSS (W)
80
85
95
100
0.001 0.1 1 10
3800 TA05b
60
0.01
90
75
65
0.80
1.60
2.00
2.80
3.20
0
2.40
1.20
0.40
V
IN
= 13.8V