5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
Buck-Boost Mode
L=[Vin(min)*(Vout)]/(Vout+Vin(min))*F*Iripple=[5V*19V]/(19+5)*300*1.2=10.95uH
Buck-Boost Mode Ipeak = Buck Mode Ipeak *2
Cvcc=10Chb
软启动引脚
SS
，当
Vss<Vfb(1.23V)
控制误差放大器使输出低于正常电压，
:tss=(C16*1.23)/10uA
开关
R4/R7=(Vout/1.23V)-1 Vo=36V,R4=28.3K,R7=1K
Rt = 18.3K,F = 300K
Rt = 19.1K,F = 296.7K
Rt = 22K,F = 263.1K
Rt = 24K,F = 241.5K
Rt = 27K,F = 219.3K
Rt = 29.467K,F = 197K
DC5V-40V
DC2.5V-25V
DC_15~30V
DC_15~30V
Title
Size Document Number Rev
Date: Sheet
of
<Doc> V1.0
DC-DC Buck-Boost
A4
11Thursday, July 13, 2023
Title
Size Document Number Rev
Date: Sheet
of
<Doc> V1.0
DC-DC Buck-Boost
A4
11Thursday, July 13, 2023
Title
Size Document Number Rev
Date: Sheet
of
<Doc> V1.0
DC-DC Buck-Boost
A4
11Thursday, July 13, 2023
F1
MSM300
1 2
TP1
TP
H4
HOLE
1
C16 47uF/25V/1210
H1
HOLE
1
Q4
AOD2610E_NMOS_TO252
D
4
G
1
S
3
R57
1M/5%/0603
C1 100nF/50V/0805
C24 10uF/50V/1210
C8 470pF/50V/0603
C22
100nF/50V/0805
C2 22uF/50V/1210
C6 470nF/50V/0805
R6 18.7K/1%/0603
Q1
AOD2610E_NMOS_TO252
D
4
G
1
S
3
C19 22uF/50V/1210
C4 470nF/50V/0805
R1
32.4K/1%/0603
+
C21 47uF/35V/35SVPF82M/NC
C7
1nF/50V/0603
C17 22uF/50V/1210
C5 47uF/25V/1210
Q2
AOD2610E_NMOS_TO252
D
4
G
1
S
3
D4
SBDD20150CT
4
1
3
R7
1K/1%/0603
D2
SBDD20150CT
4
1
3
C3
100nF/50V/0603
D3
SBDD20150CT
4
1
3
+
C23 47uF/35V/35SVPF82M/NC
C10
1uF/50V/0603
Q3
AOD2610E_NMOS_TO252
D
4
G
1
S
3
J3
CON2
1
2
C26 22uF/25V/1210
C18 22uF/50V/1210
L3
33uH_Cir20mm_65125
R58
20K/3296
C15 47uF/25V/1210
C14
100nF/400V/10%
R3
15mR/1%/2512/2W
D1
SBDD20150CT
4
1
3
C25 10uF/50V/1210
C11 33nF/50V/0603
J2
CON4A
1
3
2
4
R2
7.5K/1%/0603
J1
CON4A
1
3
2
4
J4
CON2
1
2
C9
22nF/50V/0603
R4
14.3K/1%/0603/NC
R5
24K/1%/0603
H3
HOLE
1
H2
HOLE
1
C20 22uF/25V/1210
U1
LM25118
VIN
1
UVLO
2
RT
3
EN
4
RAMP
5
AGND
6
SS
7
FB
8
COMP
9
VOUT
10
SYNC
11
CS
12
CSG
13
PGND
14
LO
15
VCC
16
VCCX
17
HB
18
HO
19
HS
20
EP
21
SW1
SW NC
1
2
3
4
5
SS
RAMP
RT
VCC
FB
EN
LO
CSG
CS
HS
HB
COMP
SYNC
EN
UVLO1.23V
HO
