LTC3707IGN datasheet(32/32 Pages) LINER

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LTC3707

3707fb

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

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

LT 0508 REV B • PRINTED IN USA

TYPICAL APPLICATION

PART NUMBER

DESCRIPTION

COMMENTS

LTC1159

High Efﬁciency Synchronous Step-Down Switching Regulator

100% DC, Logic Level MOSFETs, VIN < 40V

LTC1438/LTC1439

Dual High Efﬁciency Low Noise Synchronous Step-Down Switching Regulators POR, Auxiliary Regulator

LTC1438-ADJ

Dual Synchronous Controller with Auxiliary Regulator

POR, External Feedback Divider

LTC1538-AUX

Dual High Efﬁciency Low Noise Synchronous Step-Down Switching Regulator Auxiliary Regulator, 5V Standby

LTC1539

Dual High Efﬁciency Low Noise Synchronous Step-Down Switching Regulator 5V Standby, POR, Low-Battery, Aux Regulator

LTC1530

High Power Step-Down Syncrhonous DC/DC Controller in SO-8

High Efﬁciency 5V to 3.3V Conversion at Up to 15A

LTC1625/LTC1775

No RSENSE™ Current Mode Synchronous Step-Down Controller

97% Efﬁciency, No Sense Resistor, 16-Pin SSOP

LTC1628/LTC1628-PG Dual High Efﬁciency 2-Phase Synchronous Step-Down Switching Regulator

Constant Frequency, 5V and 3.3V LDOs, VIN ≤ 36V

LTC1629

20A to 200A PolyPhase

™ Synchronous Controller

Expandable from 2-Phase to 12-Phase, Uses All

Surface Mount Components, No Heat Sink

LTC1702

No RSENSE 2-Phase Dual Synchronous Step-Down Controller

550kHz, No Sense Resistor

LTC1703

No RSENSE 2-Phase Dual Synchronous Step-Down Controller with 5-Bit

Mobile VID Control

Mobile Pentium III Processors, 550kHz, VIN ≤ 7V

LT1709

High Efﬁciency, 2-Phase Synchronous Step-Down Switching Regulator with

5-Bit VID

1.3V ≤ VOUT ≤ 3.5V, Current Mode Ensures Accurate

Current Sharing, 3.5V ≤ VIN ≤ 36V

LTC1735

High Efﬁciency Synchronous Step-Down Switching Regulator

Output Fault Protection, 16-Pin SSOP

LTC1736

High Efﬁciency Synchronous Controller with 5-Bit Mobile VID Control

Output Fault Protection, 24-Pin SSOP, 3.5V ≤ VIN ≤ 36V

LTC1929

2-Phase Synchronous Controller

Up to 42A, Uses All Surface Mount Components,

No Heat Sink, 3.5V ≤ VIN ≤ 36V

Adaptive Power, No RSENSE and PolyPhase are trademarks of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.

Figure 13. LTC3707 5V/4A, 3.3V/4A Regulator

0.1μF

4.7μF

22μF

50V

M1A

M1B

M2A

M2B

1μF

10V

0.1μF

10Ω

0.015Ω

INTVCC

3.3V

0.1μF

20k

105k

33pF

15k

33pF

15k

220pF

1000pF

0.1μF

20k

63.4k

RUN/SS1

SENSE1+

SENSE1–

VOSENSE1

FREQSET

STBYMD

FCB

ITH1

SGND

3.3VOUT

ITH2

VOSENSE2

SENSE2–

SENSE2+

PGOOD

TG1

SW1

BOOST1

VIN

BG1

EXTVCC

INTVCC

PGND

BG2

BOOST2

SW2

TG2

RUN/SS2

LTC3707

8μH

47μF 6.3V

56μF, 4V

GND

VOUT2

3.3V

3A; 4A PEAK

VOUT1

3A; 4A PEAK

VIN

5.2V TO

28V

3707 F13

VIN: 5.2V TO 28V

VOUT: 5V, 4A/3.3V, 4A

SWITCHING FREQUENCY = 300kHz

MI, M2: FDS6982S

L1, L2: 8mH SUMIDA CEP1238R0MC

OUTPUT CAPACITORS: PANASONIC SP SERIES

27pF

0.1μF

CMDSH-3TR

0.01μF

PGOOD

VPULL-UP

(<7V)

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