DIO70040

Version 1.1, Aug 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. Thermal Considerations ..............................................................................................................................3

6. Electrical Characteristics .............................................................................................................................4

7. Typical Performance Characteristics .......................................................................................................... 5

8. Block Diagram .............................................................................................................................................7

9. Application Information ................................................................................................................................8

9.1. Power supply considerations ............................................................................................................8

9.2. Undervoltage lockout ........................................................................................................................8

9.3. Enable.............................................................................................................................................. 8

9.4. Overcurrent protection ......................................................................................................................8

9.5. Thermal protection ............................................................................................................................9

9.6. Reverse-voltage protection .............................................................................................................. 9

9.7. FLG output .....................................................................................................................................9

10. Physical Dimension: SOT23-5 ................................................................................................................10

List of Figures

Figure 1. SOT23-5 (Top view) .........................................................................................................................1

Figure 2. Quiescent current vs. Input voltage .................................................................................................5

Figure 3. Static RDS(ON) vs. Input voltage .........................................................................................................5

Figure 4. Current limit threshold vs. Input voltage .......................................................................................... 5

Figure 5. No-load to short-circuit response .....................................................................................................5

Figure 6. Input voltage turn on rise time......................................................................................................... 5

Figure 7. Input voltage turn off fall time...........................................................................................................5

Figure 8. Enable voltage turn on rise time...................................................................................................... 6

Figure 9. Enable voltage turn off fall time....................................................................................................... 6

Figure 10. No load to short transient response ...............................................................................................6

Figure 11. Short to no load transient response...............................................................................................6

Figure 12. Heavy load to short transient response .........................................................................................6

Figure 13. Short to heavy load transient response .........................................................................................6