RT4801H

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is a registered trademark of Richtek Technology Corporation.

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DS4801H-00

May

2016

2

Pin Configurations

(TOP VIEW)

VIN

PGND

CF1

BST

VOP

LXP

VON

GND

BST

ENN

CF2

PGND

ENP

SCL

SDA

C1

C2

C3

D3

D1

E1

E2

E3

D2

A1

A2

A3

B3

B1

B2

WL-CSP-15B 1.31x2.07 (BSC)

Marking Information

49 : Product Code

W : Date Code

49W

Functional Pin Description

Pin No.

Pin Name

Pin Function

A1

ENN

Enable Control Input for VON.

A2

VON

Negative Terminal Output.

A3

CF2

Negative Charge Pump Flying Capacitor Pin.

B1

ENP

Enable Control Input for VOP.

B2

SCL

B3, E1

PGND

Power Ground.

C1

VIN

Power Input.

C2

SDA

C3

CF1

Negative Charge Pump Flying Capacitor Pin.

D1

LXP

Switching Node of Boost Converter.

D2

GND

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

GND for maximum power dissipation.

D3, E2

BST

Output Voltage of Boost Converter.

E3

VOP

Positive Terminal Output.