Datasheet

LTC3862
42
3862fc
For more information www.linear.com/LTC3862
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
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FAX: [phone]
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www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2008
LT 1213 REV C • PRINTED IN USA
SENSE1
+
3V8
SLOPE
BLANK
CLKOUT
SYNC
PLLFLTR
PHASEMODE
D
MAX
10nF
SENSE1
–
SENSE2
–
SENSE2
+
RUN
FREQ
SS
V
IN
45.3k 15k
100k
10Ω
V
IN
5V TO 24V
D1
MBRD835L
D2
MBRD835L
10Ω
L2
4.2µH
CDEP145-4R2
ITH
SGND
V
OUT
6.98k
FB
26.7k
130k
10nF
1µF
1nF
22µF 25V
0.007Ω
1W
Q1
Si7386DP
Q2
Si7386DP
0.007Ω
1W
V
OUT
24V
5A (MAX)
3862 TA04
100µF
35V
100µF
35V
22µF 25V
22µF 25V
10µF 50V
LTC3862
1nF
100pF
INTV
CC
GATE1
GATE2
PGND
4.7µF
10nF
10µF 50V
10µF 50V
10µF 50V
L1
4.2µH
CDEP145-4R2
+
+
relaTeD parTs
Typical applicaTion
PART NUMBER DESCRIPTION COMMENTS
LTC3787/
LTC3787-1
Single Output, Dual Channel Multiphase Synchronous
Step-Up Controller
4.5V (Down to 2.5V After Start-Up) ≤ V
IN
≤ 38V, V
OUT
Up to 60V, 50kHz to
900kHz Operating Frequency, 4mm × 5mm QFN-28, SSOP-28
LTC3788-1 Dual Output, Multiphase 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 Frequency, 5mm × 5mm QFN-32, SSOP-28
LTC3786 Low IQ 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-16, MSOP-16E
LT3757A Boost, Flyback, SEPIC and Inverting Controller 2.9V ≤ V
IN
≤ 40V, Current Mode Control, 100kHz to 1MHz Programmable
Operation Frequency, 3mm × 3mm DFN-10 and MSOP-10E Packages
LTC3859AL 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(BUCKS)
Up to 24V, V
OUT(BOOST)
Up to 60V,
I
Q
= 28μA
LTC3789 High Efficiency Synchronous 4-Switch Buck-Boost
DC/DC Controller
4V ≤ V
IN
≤ 38V, 0.8V ≤ V
OUT
≤ 38V, 4mm × 5mm QFN-28, SSOP-28
A 12V Input, 24V/5A Output 2-Phase Boost Converter Application Circuit