LTC3708_15 Datasheet, PDF(25/32 Page) Linear Technology – Fast 2-Phase, No RSENSE Buck Controller with Output Tracking

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LTC3708_15 Datasheet, PDF (25/32 Pages) Linear Technology – Fast 2-Phase, No RSENSE Buck Controller with Output Tracking

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APPLICATIONS INFORMATION

RON1

COUT1

CIN1

VIN

CIN2

COUT2

FCB

TG1

PGOOD

VFB1

SW1

ITH1

CB1

BOOST

ION1

SENSE1+ EXTLPF

SENSE1â TRACK1

PGND1

BG1

VRNG1

VCC

CDR1

LTC3708

DRVCC

SGND

CDR2

BG2

RUN/SS

PGND2 VRNG2

SENSE2â TRACK2

SENSE2+ INTLPF

BOOST2

ION2

CB2

SW2

ITH2

TG2

VFB2

RON2

Figure 14. LTC3708 Layout Diagram

LTC3708

CVCC

CSS

3708 F15

â¢ Connect the decoupling capacitors CDR1 and CDR2

close to the DRVCC and PGND pins. Connect CB1 and

CB2 close to the BOOST and SW pins.

â¢ Connect the decoupling capacitor CVCC right across the

VCC pin and SGND plane. Connect the EA compensation

components close to the ITH pins. Connect the PLL loop

ï¬lter close to the EXTLPF and INTLPF pins. Connect the

ION decoupling capacitor close to the ION pins.

â¢ Flood all unused areas on all layers with copper.

Flooding will reduce the temperature rise of the power

components. You can connect the copper area to any

DC net (VIN, VOUT, GND or to any other DC rail in your

system).

3708fb

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