Datasheet

LTC3786
28
3786fa
applicaTions inForMaTion
Figure 13. Low I
Q
Lithium-Ion to 5V/4A Boost Converter
SENSE
+
SENSE
–
TG
C
B
0.1µF
C
ITHA
100pF
LTC3786
C
SS
0.1µF
C
ITH
6.8nF
C
IN
47µF
×2
MTOP
MBOT
D1
3786 F13a
V
OUT
5V
4A
V
IN
2.7V TO 4.2V
C1
10µF
C
F LY
1µF
R
SENSE
6mΩ
L
0.67µH
BOOST
SW
VBIAS
BG
GND
PGOOD
INTV
CC
VFB
ITH
SS
R
A
150k
100k
R
ITH
5.11k
R
B
475k
FREQ
RUN
PLLIN/MODE
C
OUT
47µF
×4
V
OUT
LTC1754-5
C
+
C
–
V
IN
SHDN
GND
C
IN
, C
OUT
: TDK C3225X5R1A476M
L: TOKO FDV0840-R67M
MBOT, MTOP: INFINEON BSC046N02KS
Q: VISHAY SILICONIX Si1499DH
D1: INFINEON BAS140W
D2: NXP PMEG2005EJ
C
F LY
: MURATA GRM39X5R105K6.3AJ
C1, C2: MURATA GRM40X5R106K6.3AJ
C
INT
4.7µF
D2
Q
1M
C2
10µF
OUTPUT CURRENT (A)
3210
94
EFFICIENCY (%)
96
4
3786 F13b
92
90
88
86
98
V
IN
= 4.2V
V
IN
= 3.3V
V
IN
= 2.7V