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

LTC3789
Typical Application
24V/5A Buck-Boost Regulator
R30
V_IN+ ^68.1k
R31
12.1k
R5 V_IN
10Ω, 0805
V_OS+
R_FB1
232k
R_FB2
8.06k
0.01µF
R9, 1.24k
INTV_CC
R7
100k
28
1
V_FB
2
SS
27
PGOOD SW1
26
TG1
3 _SENSE1+
25
BOOST1
C15
1µF
50V
1210
R11, 0Ω
C6 +
3.3µF
50V
1210
C_IN1 +
270µF
50V
OPT
Q2
SiR422DP
C4
0.22µF, 16V
R10, 1.24k
C_C2, 0.01µF
C11, OPT
C_C1, 1000pF
R_C, 15k
4 _SENSE1–
24
PGND1
5
23
I_TH
BG1
22
6
LTC3789EGN ^VIN
SGND
INTV_CC
D4
Q4
DFLS160 SiR422DP
C18
10µF, 1206
D8
BZX84-
C5V1
R21
121k, 1%
C7, 0.1µF
C8, 0.1µF
7 _{MODE/PLLIN INTVCC} 21
8 _FREQ
20
EXTV_CC
9 _RUN
10 _VINSNS
11 _VOUTSNS
BG2 ¹⁹
BOOST2 ¹⁸
D7
DFLS160
D2
BAS16
3
1
R1, 5.6Ω
R25
0Ω
R14
100Ω
V_OUT
12 _ILIM
R13, 100Ω
13
C10, 2.2µF 14
I_OSENSE+
I_OSENSE–
TG2 ¹⁷
SW2 ¹⁶
TRIM ¹⁵
C22
0.22µF, 16V
V_IN
L1: WÜRTH 7443630550
R4, 100Ω
R3, 100Ω
J3 _VIN
C_IN2
270µF
9V TO
35V
50V
V_OUT1
Q3
SiR422DP
V_OUT
C1
R2 +
2.2µF, _0.010Ω
50V _2%
X5R
D6
B240A
L1
5.5µH
D5
B240A
Q5
SiR422DP
R18
8mΩ
2%
3789 TA02
J1 _VOUT
24V AT
C_OUT2
330µF
34V
R8 ^5A
10Ω
V_OS+
C3
2.2µF
50V
X5R
Related Parts
PART NUMBER
LTC3780
LTC3785
LTM4605
LTM4607
LTM4609
LTC3112
LTC3533
DESCRIPTION
High Efficiency (Up to 98%) Synchronous, 4-Switch Buck-Boost
DC/DC Controller
High Efficiency (Up to 98%) Synchronous, 4-Switch Buck-Boost
DC/DC Controller
High Efficiency Buck-Boost DC/DC µModule™ Regulator
Complete Power Supply
High Efficiency Buck-Boost DC/DC µModule Regulator
Complete Power Supply
High Efficiency Buck-Boost DC/DC µModule Regulator
Complete Power Supply
2.5A Synchronous Buck-Boost DC/DC Converter
2A Synchronous Buck-Boost Monolithic DC/DC Converter
COMMENTS
4V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 30V, 5mm × 5mm QFN-32 and
SSOP-24 Packages
2.7V ≤ V_IN ≤ 10V, 2.7V ≤ V_OUT ≤ 10V, 4mm × 4mm
QFN-24 Package
4.5V ≤ V_IN ≤ 20V, 0.8V ≤ V_OUT ≤ 16V, 15mm × 15mm × 2.8mm
LGA Package
4.5V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 25V, 15mm × 15mm × 2.8mm
LGA Package
4.5V ≤ V_IN ≤ 36V, 0.8V ≤ V_OUT ≤ 34V, 15mm × 15mm × 2.8mm
LGA Package
2.7V ≤ V_IN ≤ 15V, 2.5V ≤ V_OUT ≤ 14V, 4mm × 5mm DFN-16 and
TSSOP-20 Packages
1.8V ≤ V_IN ≤ 5.5V, 1.8V ≤ V_OUT ≤ 5.25V, I_Q = 40µA,
I_SD < 1µA, 3mm × 4mm DFN-14 Package
30 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 950_Fo3_r5_m-7_o4_re1_i7_{nformation www.linear.com/LTC3789}
[phone] ^● FAX: [phone] ^● www.linear.com/LTC3789
3789fc
LT 1114 REV B • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2010