LTC3890 datasheet(34/34 Pages) LINER

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LTC3807

3807fa

For more information www.linear.com/LTC3807

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LINEAR TECHNOLOGY CORPORATION 2014

LT 1015 REV A • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC3807

RELATED PARTS

TYPICAL APPLICATION

PART NUMBER

DESCRIPTION

COMMENTS

LTC3857/LTC3857-1

Low IQ, Dual Output 2-Phase Synchronous Step-Down

DC/DC Controllers with 99% Duty Cycle

Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 38V,

0.8V ≤ VOUT ≤ 24V, IQ = 50µA

LTC3858/LTC3858-1

Low IQ, Dual Output 2-Phase Synchronous Step-Down

DC/DC Controllers with 99% Duty Cycle

Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 38V,

0.8V ≤ VOUT ≤ 24V, IQ = 170µA, Short-Circuit Latchoff

LTC3868/LTC3868-1

Low IQ, Dual Output 2-Phase Synchronous Step-Down

DC/DC Controller with 99% Duty Cycle

Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 24V,

0.8V ≤ VOUT ≤ 14V, IQ = 170µA, Short-Circuit Latchoff

LTC3834/LTC3834-1

Low IQ, Single Output Synchronous Step-Down DC/DC

Controller with 99% Duty Cycle

Phase-Lockable Fixed Frequency 140kHz to 650kHz, 4V ≤ VIN ≤ 36V,

0.8V ≤ VOUT ≤ 10V, IQ = 30µA

LTC3859AL

Low IQ, Triple Output Buck/Buck/Boost Synchronous

DC/DC Controller

All Outputs Remain in Regulation Through Cold Crank, 2.5V ≤ VIN

≤ 38V, VOUT(BUCKS) Up to 24V, VOUT(BOOST) Up to 60V, IQ = 28µA

LTC3867

Synchronous Step-Down DC/DC Controller with

Nonlinear Control and Remote Sense

Fast Transient Response, tON(MIN) = 65ns, 4V ≤ VIN ≤ 38V,

0.6V ≤ VOUT ≤ 14V, 4mm × 4mm QFN-24

LTC3864

Low IQ, High Voltage Step-Down DC/DC Controller

with 100% Duty Cycle

Fixed Frequency 50kHz to 850kHz, 3.5V≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ VIN,

IQ = 40µA, MSOP-12E, 3mm × 4mm DFN-12

LTC3891

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

Controller

PLL Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 24V,

IQ = 50µA

LTC3890/LTC3890-1/

LTC3890-2/LTC3890-3

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

Down DC/DC Controller

Phase-Lockable Fixed Frequency 50kHz to 900kHz, 4V ≤ VIN ≤ 60V,

0.8V ≤ VOUT ≤ 24V, IQ = 50µA

0.1µF

CIN

22µF

VIN

9V TO 38V

VOUT

INTVCC

34.8k

470pF

100k

MTOP, MBOT: Si7850DP

L1 COILCRAFT SER1360-802KL

COUT: SANYO 10TPE330M

D1: DFLS1100

10.5k

3807 F14

2.2µF

0.1µF

FREQ

ITH

SGND

LTC3807

VIN

PGOOD

RUN

ILIM

EXTVCC

PLLIN/MODE

INTVCC

PGND

8µH

RSENSE

10m

BOOST

SENSE+

SENSE–

VFB

MTOP

MBOT

1nF

VOUT

8.5V

TRACK/SS

350kHz

COUT

330µF

10µF

Figure 14. High Efficiency 8.5V Step-Down Converter

LTC3890 Datasheet(PDF) 34 Page - Linear Technology

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