LTC7813 datasheet(38/38 Pages) LINER

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LTC3895

3895fa

For more information www.linear.com/LTC3895



LINEAR TECHNOLOGY CORPORATION 2016

LT 0916 REV A • PRINTED IN USA

LinearTechnology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC3895

relaTeD parTs

Typical applicaTion

PART NUMBER

DESCRIPTION

COMMENTS

LTC3891

60V, Low IQ, Synchronous Step-Down

DC/DC Controller with 99% Duty Cycle

PLL Fixed Frequency 50kHz to 900kHz

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

LTC3810

100V Synchronous Step-Down DC/DC Controller

Constant On-Time Valley Current Mode

4V ≤ VIN ≤ 100V, 0.8V ≤ VOUT ≤ 0.93 VIN, SSOP-28

LTC3703

100V Synchronous Switching Regulator Controller

Fixed Frequency 100kHz to 600kHz, Voltage Mode Control 9.3V ≤ VIN ≤ 100V,

0.8V ≤ VOUT ≤ 0.93VIN, SSOP-16/SSOP-28

LTC3892/

LTC3892-1

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

DC/DC Controller with 29µA Burst Mode IQ

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

0.8V ≤ VOUT ≤ 0.99 VIN, Adjustable 5V to 10V Gate Drive, IQ = 29μA

LTC3639

High Efficiency, 150V 100mA Synchronous

Step-Down Regulator

Integrated Power MOSFETs, 4V ≤ VIN ≤ 150V,

0.8V ≤ VOUT ≤ VIN, IQ = 12μA, MSOP-16(12)

LTC3638

High Efficiency, 140V 250mA Step-Down Regulator

Integrated Power MOSFETs, 4V≤ VIN ≤ 140V,

0.8V ≤ VOUT ≤ VIN, IQ = 12μA, MSOP-16(12)

LTC7138

High Efficiency, 140V 400mA Step-Down Regulator

Integrated Power MOSFETs, 4V ≤ VIN ≤ 140V,

0.8V ≤ VOUT ≤ VIN, IQ = 12μA, MSOP-16(12)

LTC3899

60V, Triple Output, Buck/Buck/Boost Synchronous

Controller with 30µA Burst Mode IQ

4.5V (Down to 2.2V After Start-Up) ≤ VIN ≤ 60V,

Buck VOUT Range: 0.8V to 60V, Boost VOUT Up to 60V

LTC7860

High Efficiency Switching Surge Stopper

3.5V ≤ VIN ≤ 60V, Expandable to 200V+, Adjustable VOUT Clamp

and Current Limit, Power Inductor Improves EMI, MSOP-12

LT8631

100V, 1A Synchronous Micropower Step-Down

Regulator

Integrated Power MOSFETs, 3V ≤ VIN ≤ 100V,

0.8V ≤ VOUT ≤ 60V, IQ = 7μA, TSSOP-20

LTC7813

Low IQ, Synchronous Boost + Buck DC/DC Controller

4.5V (Down to 2.2V after Start-Up) ≤ VIN ≤ 60V, 0.8V ≤ VOUT ≤ 60V,

Adjustable 5V to 10V Gate Drive, IQ = 33μA

150µF

COUTA

22µF

COUTB

RSENSE

MBOT

MTOP

0.1µF

33µH

CSNS

1nF

CITHA

4.7nF

CITHB

100pF

36.5k

CSS

0.1µF

CINTVCC

0.1µF

RPGOOD

100k

CDRVCC

4.7µF

100µF

CINA

0.47µF

CINB

511k

RITH

10k

MNDRV

RFREQ

30.1k

RDRVSET

80.6k

10pF

VIN

INTVCC

CPUMP_EN

DRVSET

DRVUV

ITH

GND

LTC3895

SENSE+

SENSE–

EXTVCC

VFB

BOOST

NDRV

DRVCC

VIN

7V to 140V

VOUT

12V*

*VOUT FOLLOWS VIN WHEN VIN < 12V

OVLO

PHASMD

PLLIN

PGOOD

VPRG

ILIM

CLKOUT

GND

RUN

FREQ

3895 TA06

GND

MTOP, MBOT: BSC520N15NS3G

MNDRV: IPD320N20N3

L1: WURTH 7443633300

COUTA: AVX TPSD157M016R0125

MODE

PINS NOT USED IN THIS CIRCUIT

Figure 13. High Efficiency 140V to 12V Step-Down Converter

LTC7813 Datasheet(PDF) 38 Page - Linear Technology

LTC7813 Datasheet(HTML) 38 Page - Linear Technology

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