MIC7401 Datasheet, PDF (3/68 Pages) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator plus One-Boost with HyperLight Load®, I2C Control, and Enable

Micrel, Inc.
MIC7401
Table of Contents
General Description ................................................................................................................................................................ 1
Features .................................................................................................................................................................................. 1
Applications ............................................................................................................................................................................. 1
Typical Application .................................................................................................................................................................. 2
Ordering Information ............................................................................................................................................................... 2
Table of Contents .................................................................................................................................................................... 3
List of Figures.......................................................................................................................................................................... 5
List of Tables ........................................................................................................................................................................... 6
Pin Configuration..................................................................................................................................................................... 6
Pin Description ........................................................................................................................................................................ 7
Absolute Maximum Ratings .................................................................................................................................................. 10
Operating Ratings ................................................................................................................................................................. 10
Electrical Characteristics ....................................................................................................................................................... 10
Typical Characteristics .......................................................................................................................................................... 15
Functional Characteristics ..................................................................................................................................................... 17
MIC7401 Block Diagram ....................................................................................................................................................... 24
Functional Description........................................................................................................................................................... 25
Programmable Buck Soft-Start Control ............................................................................................................................. 25
Buck Digital Voltage Control (DVC)................................................................................................................................... 26
Programmable Boost Soft-Start Control ............................................................................................................................ 27
Boost Digital Voltage Control (DVC) ................................................................................................................................. 28
Buck Current Limit ............................................................................................................................................................. 28
Boost Current Limit ............................................................................................................................................................ 29
Global Power Good Pin ..................................................................................................................................................... 29
Standard Delay .................................................................................................................................................................. 29
Power-Up Sequencing....................................................................................................................................................... 29
Programmable Power-on-Reset (POR) Delay .................................................................................................................. 30
Power-Down Sequencing .................................................................................................................................................. 30
Stand-By Mode .................................................................................................................................................................. 31
Resistive Discharge ........................................................................................................................................................... 31
STBY Pin ........................................................................................................................................................................... 31
Safe Start-Up into a Pre-Biased Output ............................................................................................................................ 32
Buck Regulator Power Dissipation .................................................................................................................................... 32
Total Power Dissipation ..................................................................................................................................................... 32
Power Derating .................................................................................................................................................................. 33
Overtemperature Fault ...................................................................................................................................................... 33
Input Voltage “Hot-Plug” .................................................................................................................................................... 34
Thermal Measurements..................................................................................................................................................... 34
March 16, 2015
3
Revision 1.0