Micrel, Inc.

MIC7401

March 16, 2015

5

Revision 1.0

List of Figures

Figure 1. Buck Soft-Start..................................................................................................................................................... 25

Figure 2. Buck Soft-Start..................................................................................................................................................... 26

Figure 3. Buck DVC Control Ramp ..................................................................................................................................... 26

Figure 4. Buck DVC Control Ramp ..................................................................................................................................... 27

Figure 5. Boost Soft-Start Ramp ......................................................................................................................................... 27

Figure 6. Boost Soft-Start.................................................................................................................................................... 27

Figure 7. Boost DVC Control Ramp .................................................................................................................................... 28

Figure 8. Standard Delay Time ........................................................................................................................................... 29

Figure 9. Hot Plug

− V

IN Rising ........................................................................................................................................... 30

Figure 10. POR ..................................................................................................................................................................... 30

Figure 11. Hot Un-Plug

− V

IN Falling ..................................................................................................................................... 30

Figure 12. I

2C Stand-By Mode .............................................................................................................................................. 31

Figure 13. Output Pull-Down Resistance .............................................................................................................................. 31

Figure 14. STBY-to-NORMAL Transition (DEFAULT) .......................................................................................................... 32

Figure 15. Pre-Biased Output Voltage .................................................................................................................................. 32

Figure 16. Power Dissipation ................................................................................................................................................ 33

Figure 17. Power Derating Curve.......................................................................................................................................... 33

Figure 18. Hot-Plug Input Voltage Spike............................................................................................................................... 34

Figure 19. MIC7401 Power-Up/-Down .................................................................................................................................. 35

Figure 20. MIC7401 STBY Function (DEFAULT) ................................................................................................................. 36

Figure 21. Connections for Unused Pins .............................................................................................................................. 40

Figure 22. Read/Write Protocol............................................................................................................................................. 47