RT2875A/B

2

DS2875A/B-05

October 2016

www.richtek.com

©

Copyright

2016 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Functional Pin Description

Pin No.

Pin Name

Pin Function

1, 2

SW

Switch Node. Connect to external L-C filter.

3,

15 (Exposed Pad)

PGND

Power Ground. The exposed pad must be soldered to a large PCB and

connected to PGND for maximum power dissipation.

4

RT/SYNC

Oscillator Resistor and External Frequency Synchronization Input. Must connect

a resistor from this pin to GND to set the switching frequency. If SYNC clock is

requested, connect an external clock to change the switching frequency.

5

AGND

Analog Ground.

6

RLIM

Current Limit Setting. Connect a resistor from this pin to GND to set the current

limit value.

7

FB

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

converter to regulate to the desired via a resistive divider. Feedback reference =

0.6V.

8

COMP

Compensation Node. COMP is used to compensate the regulation control loop.

Connect a series RC network from COMP to GND. In some cases, an additional

capacitor from COMP to GND is required.

9

SS

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

soft-start period.

10

EN

Enable Control Input. High = Enable.

11

PGOOD

Power Good Indicator Output.

12, 13

VIN

Power Input. Support 4.5V to 36V input voltage. Must bypass with a suitable

large ceramic capacitor at this pin.

14

BOOT

Bootstrap Supply for High-Side Gate Driver. Connect a 0.1

F ceramic capacitor

between the BOOT and SW pins.

Ordering Information

Note :

Richtek products are :

ments of IPC/JEDEC J-STD-020.

Package Type

CP: TSSOP-14 (Exposed Pad)

RT2875A/B

Lead Plating System

G : Green (Halogen Free and Pb Free)

AQ : Latched UVP

BQ : Hiccup Mode UVP

Marking Information

RT2875BQ

GCPYMDNN

RT2875BQGCP : Product Number

YMDNN : Date Code

RT2875AQ

GCPYMDNN

RT2875AQGCP : Product Number

YMDNN : Date Code

RT2875AQGCP

RT2875BQGCP