DIO8833

Version 1.0, Nov 2025

www.dioo.com

© 2025 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 ......................................................................................................................................... 2

5. Electrical Characteristics ...................................................................................................................... 3

6. Typical Performance Characteristics................................................................................................... 6

7. Block Diagram .................................................................................................................................... 13

8. Function Description...........................................................................................................................14

8.1. Operation ..................................................................................................................................14

8.2. Control of the TEC voltage .......................................................................................................14

8.3. Start-up .....................................................................................................................................15

8.4. TEC current and voltage monitoring ........................................................................................16

8.5. High accuracy voltage reference ............................................................................................. 17

8.6. Power stage ............................................................................................................................. 17

8.7. Enable pin (EN) ........................................................................................................................17

8.8. Shutdown pin (SD) ...................................................................................................................17

8.9. TEC voltage limit ...................................................................................................................... 17

8.10. TEC current limit .................................................................................................................... 18

8.11. Hiccup mode protection ......................................................................................................... 18

8.12. VIN overvoltage protection (OVP) ......................................................................................... 19

8.13. Overtemperature protection (OTP) ........................................................................................19

8.14. Discharge............................................................................................................................... 19

8.15. I2C slave address ................................................................................................................... 19

8.16. Status bits ...............................................................................................................................19

9. Application Information ....................................................................................................................... 21

9.1. Inductor .....................................................................................................................................21

9.2. Input capacitor ..........................................................................................................................21

9.3. Output capacitor .......................................................................................................................22

9.4. REF pin capacitor .....................................................................................................................22

9.5. PCB layout guidelines ..............................................................................................................23

10. Register Maps ...................................................................................................................................24

11. Physical Dimensions: QFN2*3-16 ....................................................................................................34

List of Figures

Figure 1. QFN2*3-16 (Top view) ..................................................................................................................... 1

Figure 2. ISD vs. TA...........................................................................................................................................6

Figure 3. UVLO vs. TA.....................................................................................................................................6

Figure 4. EN_H/EN_L vs. TA........................................................................................................................... 6

Figure 5. SD_H/SD_L vs. TA........................................................................................................................... 6

Figure 6. VREF vs. TA........................................................................................................................................7