DA9131

High-Performance, Dual-Channel DC-DC Converter for

Mobile and Portable Applications

Datasheet

Revision 2.0

11-Aug-2021

CFR0011-120-00

4 of 56

© 2021 Dialog Semiconductor

Contents

General Description ............................................................................................................................ 1

Key Features ........................................................................................................................................ 1

Benefits................................................................................................................................................. 1

Applications ......................................................................................................................................... 2

System Diagrams ................................................................................................................................ 3

1

Terms and Definitions................................................................................................................... 7

2

Pinout ............................................................................................................................................. 8

3

Characteristics ............................................................................................................................ 10

3.1

Absolute Maximum Ratings ................................................................................................ 10

3.2

Recommended Operating Conditions ................................................................................. 10

3.3

Thermal Characteristics ...................................................................................................... 11

3.3.1

Thermal Ratings .................................................................................................. 11

3.3.2

Power Dissipation ................................................................................................ 11

3.4

ESD Characteristics ............................................................................................................ 11

3.5

Buck Characteristics ........................................................................................................... 12

3.6

Performance and Supervision Characteristics.................................................................... 14

3.7

Digital I/O Characteristics.................................................................................................... 15

3.8

Timing Characteristics......................................................................................................... 16

3.9

Typical Performance ........................................................................................................... 17

4

Functional Description ............................................................................................................... 18

4.1

DC-DC Buck Converter....................................................................................................... 18

4.1.1

Switching Frequency ........................................................................................... 18

4.1.2

Operation Modes and Phase Selection ............................................................... 18

4.1.3

Output Voltage Selection ..................................................................................... 19

4.1.4

Soft Start-Up and Shutdown ................................................................................ 19

4.1.5

Current Limit ........................................................................................................ 19

4.1.6

Resistive Divider .................................................................................................. 20

4.1.7

Thermal Protection .............................................................................................. 21

4.2

Internal Circuits ................................................................................................................... 21

4.2.1

IC_EN/Chip Enable/Disable................................................................................. 21

4.2.2

nIRQ/Interrupt ...................................................................................................... 21

4.2.3

GPIO .................................................................................................................... 26

4.3

Operating Modes................................................................................................................. 29

4.3.1

ON........................................................................................................................ 29

4.3.2

OFF...................................................................................................................... 29

4.4

I2C Communication ............................................................................................................. 29

4.4.1

I2C Protocol.......................................................................................................... 29

5

Register Definitions .................................................................................................................... 31

5.1

Register Map ....................................................................................................................... 31

5.1.1

System ................................................................................................................. 33

5.1.2

Buck1 ................................................................................................................... 43

5.1.3

Buck2 ................................................................................................................... 46

5.1.4

Serialization ......................................................................................................... 51