RTQ2531A

Copyright © 2022 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DSQ2531A-01

October 2022

2

Marking Information

68 : Product Code

W : Date Code

68W

Functional Pin Description

Pin No.

Pin Name

Pin Function

1

VIN

Supply input. A 10

F or larger ceramic capacitor is recommended for good noise

bypass and should be placed as close as possible to this pin.

2,

9 (Exposed Pad)

GND

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

GND for maximum power dissipation.

3

EN

Enable control input. Connecting this pin to logic high enables the regulator, and

driving this pin low puts it into shutdown mode. The device can have VIN and VEN

sequenced in any order without causing damage to the device.

4

GS

Internally Used. Connect GS to GND.

5

POK

Power-OK Output. Open-drain output that goes high when the output is above

91% of the nominal regulation voltage. The pin is pulled to ground when the output

voltage is lower than its specified threshold, EN shutdown, OCP and OTP.

6

FB

Feedback voltage input. This pin is used to set the desired output voltage via an

external resistive divider. The feedback reference voltage is 0.6V typically.

7

BYP

Bypass Input. Connecting a 0.01

F to this output further reduces output noise.

Slew rate = (5V / ms) x (0.01

F / CBYP).

8

VOUT

LDO output pin. A 4.7

F or larger ceramic capacitor (above 2F effective

capacitance) ensures the stability requirement. Place the output capacitor as

close as possible to the device and minimize the impedance between the VOUT

pin and the load.