DA9232

High Efficiency, Ultra-Low Quiescent Current and Ultra-

Low Output Ripple Buck Regulator

Datasheet

Revision 2.3

23-Apr-2018

CFR0011-120-00 Rev 5

2 of 50

© 2019 Dialog Semiconductor

Contents

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

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

Applications ......................................................................................................................................... 1

Contents ............................................................................................................................................... 2

Figures.................................................................................................................................................. 3

Tables ................................................................................................................................................... 4

1

Terms and Definitions................................................................................................................... 6

2

Block and Application Diagrams ................................................................................................. 7

3

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

4

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

5

Recommended Operating Conditions....................................................................................... 11

6

ESD Ratings ................................................................................................................................. 12

7

Electrical Characteristics ........................................................................................................... 13

8

Thermal Characteristics ............................................................................................................. 16

9

Typical Operating Characteristics ............................................................................................. 17

9.1

Buck No Load Quiescent Current vs Temperature, Device is Switching............................ 17

9.2

RDSon vs Temperature ...................................................................................................... 17

9.3

Efficiency vs Load Current .................................................................................................. 18

9.4

Switching Frequency vs Load Current ................................................................................ 19

9.5

Buck VOUT Ripple vs Load Current ...................................................................................... 20

9.6

Buck VOUT vs Load Current.................................................................................................. 21

9.7

Typical Mode Operation ...................................................................................................... 22

9.8

Buck Load Transient Response .......................................................................................... 23

9.9

Buck Dynamic Voltage Control ........................................................................................... 24

9.10 Device Enable and Start up ................................................................................................ 25

10 Feature Descriptions................................................................................................................... 26

10.1 Chip Enable and Disable Through IC_EN .......................................................................... 26

10.2 VDD Under-Voltage Lockout............................................................................................... 26

10.3 Buck Regulator.................................................................................................................... 26

10.3.1

Buck Output Voltage Programmability................................................................. 26

10.3.2

Start-up Operation ............................................................................................... 27

10.3.3

Power Saving Mode Operation............................................................................ 27

10.3.4

Dynamic Voltage Control ..................................................................................... 28

10.3.5

Cycle-by-cycle Over-Current Protection .............................................................. 28

10.3.6

Output Over-Voltage Protection .......................................................................... 28