Datasheet

LTC3411
19
3411fb
TYPICAL APPLICATIONS
Single Inductor, Positive, Buck-Boost Converter
PV
IN
LTC3411
PGND
SW
SV
IN
SGND
PGOODPGOOD
V
FB
SYNC/MODE
I
TH
SHDN/R
T
L1
3.3μH
D1
V
OUT
3.3V/
400mA
V
IN
V
IN
2.63V
TO 5V
100k
M1
R4
324k
R3
13k
3411 TA02
C3
1000pF
C7
10pF
C1, C2: TAIYO YUDEN JMK325BJ226MM
C4: SANYO POSCAP 6TPA47M
D1: ON MBRM120L
L1: TOKO A915AY-3R3M (D53LC SERIES)
M1: SILICONIX Si2302DS
R1
280k
C4
47μF
+
C1
22μF
C2
22μF
s2
R2
887k
Effi ciency vs Load Current
LOAD CURRENT (mA)
10
EFFICIENCY (%)
85
80
75
70
65
60
55
100 1000
3411 TA03
V
IN
= 4V
V
IN
= 3V
V
IN
= 3.5V
V
IN
= 2.5V
f
O
= 1MHz