DIO1298

Version 1.2, Apr 2026

www.dioo.com

© 2026 Dioo Microcircuits Co., Ltd. Jiangsu

III

Table of Contents

1. Pin Assignment and Functions ....................................................................................................................1

2. Absolute Maximum Ratings ........................................................................................................................ 2

3. Recommended Operating Conditions .........................................................................................................2

4. ESD Ratings ................................................................................................................................................3

5. Thermal Considerations ..............................................................................................................................3

6. Electrical Characteristics .............................................................................................................................3

7. Typical Characteristics ................................................................................................................................ 9

8. Block Diagram ........................................................................................................................................... 11

9. Function Description ................................................................................................................................. 12

9.1. Shutdown and enable .....................................................................................................................12

9.2. Undervoltage lockout (UVLO) ........................................................................................................ 12

9.3. Soft-start (SS) .................................................................................................................................12

9.4. Overcurrent protection (OCP) ........................................................................................................ 13

9.5. Overvoltage protecton (OVP) .........................................................................................................13

9.6. Overtemperature protection (OTP) ................................................................................................ 13

9.7. “Ideal diode” reverse-current protection (RCP) ..............................................................................13

9.8. Transient voltage suppression ....................................................................................................... 14

9.9. Auto-retry ........................................................................................................................................14

9.10.

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ACOK output flag ........................................................................................................................14

10. Application Information ............................................................................................................................15

10.1. Input capacitor ..............................................................................................................................15

10.2. Output capacitor ........................................................................................................................... 15

10.3. Safe operating area ......................................................................................................................15

11. PCB Layout Recommendations ..............................................................................................................17

12. Physical Dimensions: WLCSP-25 ...........................................................................................................18