RT7255

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is a registered trademark of Richtek Technology Corporation.

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DS7255-00

June

2015

2

Pin Configurations

(TOP VIEW)

5

3

4

6

8

2

7

SOT-23-8

Marking Information

0A= : Product Code

DNN : Date Code

RT7255BGV8

0A=DNN

09= : Product Code

DNN : Date Code

RT7255CGV8

09=DNN

06= : Product Code

DNN : Date Code

RT7255DGV8

06=DNN

0B= : Product Code

DNN : Date Code

0B=DNN

RT7255AGV8

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

BOOT

Bootstrap Supply for High-Side Gate Driver. Connect a 1

F ceramic

capacitor between the BOOT and SW pins.

2

GND

Power Ground.

3

SS

Soft-Start Time Setting. Connect a capacitor from SS to GND to set the

soft-start period.

4

FB

Feedback Voltage Input. The pin is used to set the output voltage of the

5

PGOOD

Power Good Indicator Output.

6

EN

Enable Control Input. Connect EN to a logic-high voltage to enable the IC or

to a logic-low voltage to disable. Do not leave this high impedance input

unconnected.

7

VIN

Power Input. The input voltage range is from 4.3V to 18V. Must bypass with

a suitable large ceramic capacitor at this pin.

8

SW

Switch Node. Connect to external L-C filter.