Datasheet

LTC3834
28
3834fb
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 2007
LT 0608 REV B • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
V
OUT
3.3V
5A
C
OUT
150μF
0.01μF
V
IN
4V TO 36V
M1
M2
I
TH
SGND
PLLIN/MODE
V
FB
SENSE
+
SENSE
–
CLKOUT
PLLLPF
RUN
PGOOD
TRACK/SS
INTV
CC
EXTV
CC
BG
PGND
LTC3834
L1
3.2μH
0.012Ω
68.1k
3834 F11
150pF
560pF
54k
215k
M1, M2: Si4840DY
L1: CDEP105-2R2M
C
OUT
: SANYO 10TPD150M
4.7μF
D
B
CMDSH-3
C
B
0.22μF
TG
V
IN
BOOST
SW
C
IN
10μF
39pF
Figure 11. High Effi ciency Step-Down Converter
PART NUMBER DESCRIPTION COMMENTS
LTC1735 High Effi ciency Synchronous Step-Down Switching Regulator Output Fault Protection, 16-Pin SSOP
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
LTC3708 Dual, 2-Phase, DC/DC Controller with Output Tracking Current Mode, No R
SENSE
, Up/Down Tracking, Synchronizable
LTC3727/
LTC3727-1
High Effi ciency, 2-Phase, Synchronous Step-Down Switching
Regulators
2-Phase Operation; 4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ 14V,
99% Duty Cycle, 5mm × 5mm QFN, SSOP-28
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, SSOP-28
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
LT3800 High Voltage Synchronous Regulator Controller V
IN
up to 60V, I
OUT
≤ 20A, Current Mode, Onboard Bias Regulator,
Burst Mode Operation, 16-Lead TSSOP Package
LTC3826/
LTC3826-1
30μA I
Q
, Dual, 2-Phase Synchronous Step-Down Controller 2-Phase Operation; 30μA One Channel No-Load I
Q
(50μA Total),
4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ 10V
LTC3827/
LTC3827-1
Low I
Q
Dual Synchronous Controller 2-Phase Operation; 115μA Total No Load I
Q
, 4V ≤ V
IN
≤ 36V 80μA
No-Load I
Q
with One Channel On
LTC3835/
LTC3835-1
Low IQ Synchronous Step-Down Controller 80μA No Load IQ, 4V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ 10V
LT3844 High Voltage Current Mode Controller with Programmable
Operating Frequency
V
IN
up to 60V, I
OUT
≤ 5A Onboard Bias Regulator, Burst Mode
Operation, Sync Capability, 16-Lead TSSOP Package
LTC3845 Low I
Q
Synchronous Step-Down Controller 4V ≤ V
IN
≤ 60V, 1.23V ≤ V
OUT
≤ 36V, 120μA Quiescent Current
LTC3850 Dual, 2-Phase Synchronous Step-Down DC/DC Controller 2-Phase Operation; 4V ≤ V
IN
≤ 24V, 95% Effi ciency, No R
SENSE
Option, I
OUT
up to 20A, 4mm × 4mm QFN
No R
SENSE
is a trademark of Linear Technology Corporation.