LTC3834 Datasheet, PDF (28/28 Pages) Linear Technology – 30μA IQ Synchronous Step-Down Controller

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