Datasheet

LTC3788-1
30
37881fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
●
FAX: [phone]
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2009
LT 0112 REV C • PRINTED IN USA
TYPICAL APPLICATION
RELATED PARTS
High Efficiency Dual 12V/24V Boost Converter
SENSE1
–
SENSE1
+
SENSE2
+
SENSE2
–
VFB1
ITH1
SGND
EXTV
CC
RUN1
RUN2
FREQ
SS2
VFB2
SS1
PLLIN/MODE
PGOOD1
TG1
SW1
BOOST1
BG1
VBIAS
INTV
CC
PGND
BG2
TG2
BOOST2
SW2
C
INA
, C
OUTA1
, C
OUTA2
: SANYO, 50CE220AX
C
INB
, C
OUTB1
, C
OUTB2
: TDK C4532X5R1E226M
L1: PULSE PA1494.362NL
L2: PULSE PA1294.132NL
MBOT1, MBOT2, MTOP1, MTOP2: RENESAS HAT2169H
* WHEN V
IN
< 8V, MAXIMUM LOAD CURRENT AVAILABLE IS REDUCED
R
B1
232k
1%
C
ITH1
, 220pF
C
SS1
, 0.1µF
C
SS2
, 0.1µF
C
ITH1
, 15nF
C
INT
4.7µF
C
B1
, 0.1µF
C
B1
, 0.1µF
D1
V
IN
5V TO 24V
D2
LTC3788-1
L2
1.25µH
L1
3.3µH
MTOP1
MBOT2
MBOT1
MTOP2
37881 TA02
100k
INTV
CC
C
INA
22µF
s 4
C
INB
220µF
V
OUT1
*
24V, 5A
C
OUTA1
22µF
s 4
R
SENSE1
4m
R
SENSE2
3m
C
OUTB1
220µF
V
OUT2
*
12V, 10A
C
OUTA2
22µF
s 4
C
OUTB2
220µF
R
A1
12.1k, 1%
R
A2
12.1k
R
ITH1
8.66k
ITH2
C
ITH2
, 15nF
C
ITHA2
, 100pF
R
ITH2
2.7k
R
B2
110k
+
+
+
PART NUMBER DESCRIPTION COMMENTS
LTC3787/LTC3787-1 Multiphase, Dual Channel Synchronous
Step-Up Controller
4.5V (Down to 2.5V After Start-Up) ≤ V
IN
≤ 38V, V
OUT
Up to 60V, 50kHz to 900kHz
Fixed Operating Frequency, 4mm × 5mm QFN-28, SSOP-28
LTC3786 Low I
Q
Synchronous Step-Up Controller 4.5V (Down to 2.5V After Start-Up) ≤ V
IN
≤ 38V, V
OUT
Up to 60V, 50kHz to 900kHz
Fixed Operating Frequency, 3mm × 3mm QFN-32, MSOP-16E
LTC3862/LTC3862-1 Multiphase, Dual Channel Single Output
Current Mode Step-Up DC/DC Controller
4V ≤ V
IN
≤ 36V, 5V or 10V Gate Drive, 75kHz to 500kHz Fixed Operating Frequency,
SSOP-24, TSSOP-24, 5mm × 5mm QFN-24
LTC3859A Low I
Q
, Triple Output Buck/Buck/Boost
Synchronous DC/DC Controller
All Outputs Remain in Regulation Through Cold Crank, 4.5V (Down to 2.5V After
Start-Up) ≤ V
IN
≤ 38V, V
OUT(BUCK)
Up to 24V, V
OUT(BOOST)
Up to 60V, I
Q
= 55µA
LTC3789 High Efficiency Synchronous 4-Switch
Buck-Boost DC/DC Controller
4V ≤ V
IN
≤ 38V, 0.8V ≤ V
OUT
≤ 38V, SSOP-28, 4mm × 5mm QFN-28, SSOP-28