RT4823

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is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS4823-01

September 2022

2

Ordering Information

RT4823

Package Type

WSC : WL-CSP-9B 1.3x1.2 (BSC)

Note :

Richtek products are :



RoHS compliant and compatible with the current

requirements of IPC/JEDEC J-STD-020.



Suitable for use in SnPb or Pb-free soldering processes.

Marking Information

8B : Product Code

W : Date Code

8BW

Pin Configuration

(TOP VIEW)

VOUT

GND

VIN

EN

BP

SW

SW

C1

C2

C3

B3

B1

B2

A1

A2

A3

WL-CSP-9B 1.3x1.2 (BSC)

Functional Pin Description

Pin No.

Pin Name

Pin Function

A1, A2

VOUT

Output voltage. Place COUT as close as possible to the device.

A3

VIN

Input voltage. This pin has to connect to input power to supply chip internal power.

B1, B2

SW

Switching node. The power inductor should be connected between SW and power

input.

B3

EN

Enable. When this pin is set to HIGH, the circuit is enabled. Do not leave this pin

floating.

C1, C2

GND

Ground. This is the power and signal ground reference for the chip. The COUT

bypass capacitor should be returned with the shortest path possible to these pins.

C3

BP

Bypass mode. This pin is used to control the converter into bypass mode.

(Detailed configuration is shown in Table 1.)