LTC3789_15 Datasheet, PDF (26/30 Pages) Linear Technology – High Efficiency, Synchronous, 4-Switch Buck-Boost Controller

LTC3789
APPLICATIONS INFORMATION
R1
20k
C_SS
6.8nF
R2
280k
V_OUT
C_C2
1000pF
C_C1
3300pF
R_C
68k
121k
ON/OFF
V_IN
V_OUT
V_PULLUP
C_A
0.22µF
1
V_FB PGOOD
2
SS
27
SW1
26
TG1
25
BOOST1
3 _SENSE+
24
PGND
4 _SENSE–
23
BG1
5
I_TH
6
LTC3789
SGND
22
V_IN
7 _MODE/PLLIN
8 _FREQ
INTV_CC ^{21 INTVCC}
20
EXTV_CC
V_OUT
9 _RUN
10 _VINSNS
11 _VOUTSNS
BG2 ¹⁹
BOOST2 ¹⁸
12 _ILIM
2.2µF
13
14
I_OSENSE+
I_OSENSE–
TG2 ¹⁷
SW2 ¹⁶
TRIM ¹⁵
D_A
DFLS160
D_B
DFLS160
100Ω
100Ω
1k
1k
10Ω
C_F 1µF
C_VCC 4.7µF
10mΩ
C_B
0.22µF
Q_A
SiR422DP
Q_B
SiR422DP
L
6.8µH
D1
B240A
V_IN
5V TO 38V_MAX
C_IN
47µF
Q_C
SiR422DP
Q_D
SiR422DP
D2
B240A
C_OUT
2.2µF
10mΩ
+
V_OUT
12V, 5A
330µF
3789 F13
Figure 13. LTC3789 12V/5A, Buck-Boost Regulator
PGND
26
C
SGND
RR
3789 F14
Figure 14. Sense Lines Layout
For more information www.linear.com/LTC3789
3789fc