LTC3859 datasheet(40/40 Pages) LINER

40 / 40 page

LTC3858-2

38582f

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

LT 1110 • PRINTED IN USA

RELATED PARTS

TYPICAL APPLICATION

High Efficiency 2-Phase 12V/150W Step-Down Converter

PART NUMBER

DESCRIPTION

COMMENTS

LTC3859

Low IQ, Triple Output Buck/Buck/Boost Synchronous

DC/DC Controller

Outputs (≥5V) Remain in Regulation Through Cold Crank 2.5V ≤ VIN ≤ 38V,

VOUT(BUCKS) Up to 24V, VOUT(BOOST) Up to 60V, IQ = 55μA,

LTC3868/LTC3868-1

Low IQ, Dual Output 2-Phase Synchronous Step-

Down DC/DC Controllers with 99% Duty Cycle

Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,

4V ≤ VIN ≤ 24V, 0.8V ≤ VOUT ≤ 14V, IQ = 170μA

LTC3857/LTC3857-1

Low IQ, Dual Output 2-Phase Synchronous Step-

Down DC/DC Controllers with 99% Duty Cycle

Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,

4V≤ VIN ≤ 38V, 0.8V ≤ VOUT ≤ 24V, IQ = 50μA,

LTC3890/LTC3890-1

60V, Low IQ, Dual 2-Phase Synchronous Step-Down

DC/DC Controller with 99% Duty Cycle

Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,

4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 50μA,

LTC3834/LTC3834-1

Low IQ, Synchronous Step-Down DC/DC Controllers Phase-Lockable Fixed Operating Frequency 140kHz to 650kHz,

4V ≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 10V, IQ = 30μA,

LTC3835/LTC3835-1

Low IQ, Synchronous Step-Down DC/DC Controllers Phase-Lockable Fixed Operating Frequency 140kHz to 650kHz,

4V ≤ VIN ≤ 36V, 0.8V ≤ VOUT ≤ 10V, IQ = 80μA,

LTC3891

60V, Low IQ, Synchronous Step-Down DC/DC

Controller with 99% Duty Cycle

Phase-Lockable Fixed Operating Frequency 50kHz to 900kHz,

4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V, IQ = 50μA,

LTC3824

Low IQ, High Voltage DC/DC Controller, 100% Duty

Cycle

Selectable Fixed 200kHz to 600kHz Operating Frequency 4V ≤ VIN ≤ 60V,

0.8V ≤ VOUT ≤ VIN, IQ = 40μA, MSOP-10E

SENSE1+

SENSE1–

SENSE2–

SENSE2+

VFB1

ITH1

SGND

EXTVCC

VOUT

RUN1

RUN2

FREQ

SS2

SS1

ITH1

VFB1

VFB2

SS1

ILIM

PHASMD

CLKOUT

PLLIN/MODE

PGOOD1

PGOOD2

BG1

SW1

BOOST1

TG1

VIN

INTVCC

PGND

TG2

BG2

BOOST2

SW2

1nF

RB1

698k

COUT1, COUT2: SANYO 16TQC22M

L1, L2: SUMIDA CDEP106-6ROM

MTOP1, MTOP2: INFINEON BSZ097N04LS

MBOT1, MBOT2: INFINEON BSZ097N04LS

CF1

10pF

CITH1A

68pF

CSS1

0.1μF

CITH1

3300pF

CINT

4.7μF

CB1

0.47μF

CB2

0.47μF

VIN

19V TO 28V

LTC3858-2

6μH

RSENSE1

5mΩ

RSENSE2

5mΩ

MBOT1

MTOP2

MTOP1

MBOT2

38582 TA07

100k

INTVCC

COUT1

22μF

16V

VOUT

12V

12.5A

10μF

16V

CIN

10μF

50V

10μF

50V

COUT2

22μF

16V

10μF

16V

RA1

49.9k

RITH1

2.94k

1nF

ITH2

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