LTC3560 datasheet(6/16 Pages) LINER

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LTC3560

3560f

FU CTIO AL DIAGRA

–

IRCMP

–

ICOMP

RUN

OSC

SLOPE

COMP

OSC

FREQ

SHIFT

0.6V

0.6V REF

SHUTDOWN

0.4V

0.65V

SLEEP

VIN

VFB

SYNC/MODE

BURST

VIN

RS LATCH

SWITCHING

LOGIC

AND

BLANKING

CIRCUIT

ANTI-

SHOOT-

THRU

Ω

GND

3560 BD

PI FU CTIO S

RUN (Pin 1): Run Control Input. Forcing this pin above

1.5V enables the part. Forcing this pin below 0.3V shuts

down the device. In shutdown, all functions are disabled

drawing <1

µA supply current. Do not leave RUN floating.

GND (Pin 2): Ground Pin.

SW (Pin 3): Switch Node Connection to Inductor. This pin

connects to the drains of the internal main and synchro-

nous power MOSFET switches.

VIN (Pin 4): Main Supply Pin. Must be closely decoupled

to GND, Pin 2, with a 10

µF or greater ceramic capacitor.

VFB (Pin 5): Feedback Pin. Receives the feedback voltage

from an external resistive divider across the output.

SYNC/MODE (Pin 6): External Clock Synchronization and

Mode Select Input. To synchronize with an external clock,

apply a clock with a frequency between 1MHz and 3MHz.

To select pulse skipping mode, tie to VIN. Grounding this

pin selects Burst Mode operation. Do not leave this pin

floating.

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