DIO1298

Version 1.2, Apr 2026

www.dioo.com

© 2026 Dioo Microcircuits Co., Ltd. Jiangsu

1

1. Pin Assignment and Functions

Figure 1. WLCSP-25 (Top view)

Pin No.

Pin Name

Description

A1~5, B1~5

OUT

Power switch output. Connect to battery charger input, or VSYS in systems

without rechargeable batteries.

C1~5, D1~5

IN

Power switch input. Connect to power input port (VBUS on USB port).

E1

__

EN

Enable. Active low (Only for DIO1298A).

EN

Enable. Active high (Only for DIO1298B).

E2

OVLO

External OVLO adjusting. Adjust the OVLO threshold by connecting an external

resistive voltage divider from IN to OVLO to GND. Use the internally fixed OVLO

threshold by connecting to GND.

E3

____

ACOK

Power good flag. Active low, open-drain logic output. Use external pull-up

resistor to a suitable I/O voltage. If not used, leave floating or connect to ground.

E4~5

GND

Ground. High current ground return path during surge events.