LTC3410B datasheet(6/16 Pages) LINER

Part #	LTC3410B

Description	2.25MHz, 300mA Synchronous Step-Down Regulator in SC70

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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6

LTC3410B

3410bfa

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 (Pins 2, 5): 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 2.2

µF or greater ceramic capacitor.

VFB (Pin 6 on Adjustable Version): Feedback Pin. Re-

ceives the feedback voltage from an external resistive

divider across the output.

VOUT (Pin 6 on Fixed Voltage Versions): Output Voltage

Feedback Pin. An internal resistive divider divides the

output voltage down for comparison to the internal refer-

ence voltage.

FU CTIO AL DIAGRA

+

–

EA

IRCMP

+

–

ICOMP

6

1

RUN

OSC

SLOPE

COMP

OSC

FREQ

SHIFT

0.8V

0.8V REF

SHUTDOWN

VIN

VFB/VOUT

VIN

S

R

RS LATCH

SWITCHING

LOGIC

AND

BLANKING

CIRCUIT

ANTI-

SHOOT-

THRU

Q

5

Ω

4

SW

3

5

GND

3410 BD

2

R1*

R2

240k

*R1 = 240k

– 1

VOUT

0.8

()

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LTC3410B Datasheet(PDF) 6 Page - Linear Technology

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