LTC3834 Linear Technology, LTC3834 Datasheet - Page 28

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LTC3834

Manufacturer Part Number
LTC3834
Description
Synchronous Step-Down Controller
Manufacturer
Linear Technology
Datasheet

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LTC3834
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER
LTC1735
LTC1778/
LTC1778-1
LTC3708
LTC3727/
LTC3727-1
LTC3728
LTC3729
LTC3731
LT3800
LTC3826/
LTC3826-1
LTC3827/
LTC3827-1
LTC3835/
LTC3835-1
LT3844
LTC3845
LTC3850
No R
28
SENSE
is a trademark of Linear Technology Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
DESCRIPTION
High Effi ciency Synchronous Step-Down Switching Regulator
No R
Controllers
Dual, 2-Phase, DC/DC Controller with Output Tracking
High Effi ciency, 2-Phase, Synchronous Step-Down Switching
Regulators
Dual, 550kHz, 2-Phase Synchronous Step-Down Controller
20A to 200A, 550kHz PolyPhase Synchronous Controller
3- to 12-Phase Step-Down Synchronous Controller
High Voltage Synchronous Regulator Controller
30μA I
Low I
Low IQ Synchronous Step-Down Controller
High Voltage Current Mode Controller with Programmable
Operating Frequency
Low I
Dual, 2-Phase Synchronous Step-Down DC/DC Controller
SENSE
Q
Q
Q
Dual Synchronous Controller
Synchronous Step-Down Controller
, Dual, 2-Phase Synchronous Step-Down Controller
0.01μF
FAX: (408) 434-0507
™ Current Mode Synchronous Step-Down
M1, M2: Si4840DY
L1: CDEP105-2R2M
C
215k
OUT
54k
68.1k
560pF
: SANYO 10TPD150M
39pF
150pF
Figure 11. High Effi ciency Step-Down Converter
www.linear.com
CLKOUT
PLLLPF
RUN
PGOOD
TRACK/SS
I
SGND
PLLIN/MODE
V
SENSE
SENSE
TH
FB
+
LTC3834
EXTV
BOOST
INTV
PGND
SW
V
BG
TG
CC
CC
IN
0.22μF
C
D
CMDSH-3
4.7μF
COMMENTS
Output Fault Protection, 16-Pin SSOP
Up to 97% Effi ciency, 4V ≤ V
I
Current Mode, No R
2-Phase Operation; 4V ≤ V
99% Duty Cycle, 5mm × 5mm QFN, SSOP-28
Dual 180° Phased Controllers, V
5mm × 5mm QFN, SSOP-28
Expandable from 2-Phase to 12-Phase, Uses All Surface Mount
Components, V
60A to 240A Output Current, 0.6V ≤ V
V
Burst Mode Operation, 16-Lead TSSOP Package
2-Phase Operation; 30μA One Channel No-Load I
4V ≤ V
2-Phase Operation; 115μA Total No Load I
No-Load I
80μA No Load IQ, 4V ≤ V
V
Operation, Sync Capability, 16-Lead TSSOP Package
4V ≤ V
2-Phase Operation; 4V ≤ V
Option, I
B
OUT
B
IN
IN
up to 60V, I
up to 60V, I
Up to 20A
IN
IN
OUT
≤ 36V, 0.8V ≤ V
≤ 60V, 1.23V ≤ V
Q
M1
M2
with One Channel On
up to 20A, 4mm × 4mm QFN
3.2μH
L1
OUT
OUT
IN
Up to 36V
≤ 20A, Current Mode, Onboard Bias Regulator,
≤ 5A Onboard Bias Regulator, Burst Mode
SENSE
C
10μF
0.012Ω
IN
OUT
IN
, Up/Down Tracking, Synchronizable
OUT
IN
IN
3834 F11
V
4V TO 36V
≤ 36V, 0.8V ≤ V
IN
≤ 10V
IN
≤ 36V, 0.8V ≤ V
≤ 24V, 95% Effi ciency, No R
≤ 36V, 120μA Quiescent Current
≤ 36V, 0.8V ≤ V
IN
© LINEAR TECHNOLOGY CORPORATION 2007
3.5V to 35V, 99% Duty Cycle,
V
3.3V
5A
OUT
C
150μF
OUT
OUT
≤ 6V, 4.5V ≤ V
Q
OUT
LT 0608 REV B • PRINTED IN USA
, 4V ≤ V
OUT
OUT
≤ 10V
≤ 14V,
Q
≤ (0.9)(V
(50μA Total),
IN
≤ 36V 80μA
IN
SENSE
≤ 32V
IN
),
3834fb

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