LTC3410 データシートの表示（PDF） - Linear Technology

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LTC3410

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

Linear Technology 

LTC3410

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 <1µA 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 2.2µF or greater ceramic capacitor.

VFB (Pin 6 Adjustable Version ): Feedback Pin. Receives

the feedback voltage from an external resistive divider

across the output.

VOUT (Pin 6 Fixed Voltage Versions): Output Voltage

Feedback Pin. An internal resistive divider divides the

output voltage down for comparison to the internal refer-

ence voltage.

W

FU CTIO AL DIAGRA

SLOPE

COMP

OSC

OSC

VFB/VOUT

6

FREQ

SHIFT

+

R1*

0.8V

– EA

R2

240k

VIN

RUN

1

0.8V REF

SHUTDOWN

( ) *R1 = 240k VOUT – 1

0.8

0.65V

– EN SLEEP

0.4V

+

BURST

ICOMP

SQ

RQ

RS LATCH

SWITCHING

LOGIC

AND

BLANKING

CIRCUIT

ANTI-

SHOOT-

THRU

IRCMP

4 VIN

5Ω

3 SW

5

2 GND

3410 BD

3410fb

6

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