LTC3827-1
32
38271fe
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2005
LT 0808 REV E • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
High Effi ciency Dual 3.3V/8.0V Step-Down Converter
C
IN1
10µF
C
INT2
1µF
D2
D1
C1
1nF
R
B1
215k
38271 TA06
C
SS1
0.01µF
C
ITH1
1200pF
R
ITH1
10k
R
A1
68.1k
C
ITH1A
100pF
C2
1nF
R
B2
353k
C
SS2
0.01µF
C
ITH2
560pF
R
ITH2
35k
R
A2
39.2k
C
ITH2A
100pF
C
B2
0.47µF
R2
100k
C
INT1
4.7µF
C
OUT2
150µF
C
B1
0.47µF
MTOP2
MBOT2
MTOP1
MBOT1
L2
7.2µH
R
SNS2
15mΩ
V
OUT1
3.3V
10A
V
IN
12V
V
OUT2
8V
2A
L1
1.5µH
R
SNS1
5mΩ
C
IN2
10µF
C
OUT1
150µF
× 2
I
TH1
V
FB1
SENSE1
+
SENSE1
–
PLLLPF
PLLIN/MODE
SGND
RUN1
RUN2
SENSE2
–
SENSE2
+
V
FB2
I
TH2
TRACK/SS2
TRACK/SS1
PGOOD1
TG1
SW1
BOOST1
BG1
V
IN
PGND
EXTV
CC
INTV
CC
BG2
BOOST2
SW2
TG2
LTC3827-1
+
39pF
MTOP1, MTOP2, MBOT1, MBOT2: Si7848DP
L1: CDEP105-3R2M
L2: CDEP105-7R2M
C
OUT1
, C
OUT2
: SANYO 10TPD150M
PART NUMBER DESCRIPTION COMMENTS
LTC1628/LTC1628-PG/
LTC1628-SYNC
2-Phase, Dual Output Synchronous Step-Down
DC/DC Controller
Reduces C
IN
and C
OUT
, Power Good Output Signal, Synchronizable,
3.5V ≤ V
IN
≤ 36V, I
OUT
Up to 20A, 0.8V ≤ V
OUT
≤ 5V
LTC1735 High Effi ciency Synchronous Step-Down
Switching Regulator
Output Fault Protection, 16-Pin SSOP Package
LTC1778/LTC1778-1 No R
SENSE
™ Current Mode Synchronous Step-Down
Controllers
Up to 97% Effi ciency, 4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ (0.9)(V
IN
),
I
OUT
Up to 20A
LT1976 High Voltage Step-Down Switching Regulator 3.3V ≤ V
IN
≤ 60V, 100µA Quiescent Current
LTC3708 Dual, 2-Phase, DC/DC Controller with Output Tracking Current Mode, No R
SENSE
, Up/Down Tracking, Synchronizable
LTC3727/LTC3727A-1 2-Phase Dual Synchronous Controller 0.8V ≤ V
OUT
≤ 14V; 4V ≤ V
IN
≤ 36V
LTC3728 Dual, 550kHz, 2-Phase Synchronous Step-Down
Controller
Dual 180° Phased Controllers, V
IN
3.5V to 35V, 99% Duty Cycle,
5mm × 5mm QFN and SSOP-28 Packages
LTC3729 20A to 200A, 550kHz PolyPhase
®
Synchronous Controller Expandable from 2-Phase to 12-Phase, Uses All Surface Mount
Components, V
IN
Up to 36V
LTC3731 3- to 12-Phase Step-Down Synchronous Controller 60A to 240A Output Current, 0.6V ≤ V
OUT
≤ 6V, 4.5V ≤ V
IN
≤ 32V
LTC3835/LTC3835-1 Low I
Q
Synchronous Step-Down Controller Single Channel LTC3827/LTC3827-1
PolyPhase is a registered trademark of Linear Technology Corporation. No R
SENSE
is a trademark of Linear Technology Corporation.
