DA9220
High-Performance Dual-Channel DC-DC Converter
Contents
General Description ............................................................................................................................ 1
Key Features ........................................................................................................................................ 1
Applications ......................................................................................................................................... 1
System Diagrams ................................................................................................................................ 2
Contents ............................................................................................................................................... 3
1
2
3
Terms and Definitions................................................................................................................... 5
Pinout ............................................................................................................................................. 6
Characteristics .............................................................................................................................. 8
3.1 Absolute Maximum Ratings .................................................................................................. 8
3.2 Recommended Operating Conditions................................................................................... 8
3.3 Thermal Characteristics ........................................................................................................ 9
3.3.1
3.3.2
Thermal Ratings .................................................................................................... 9
Power Dissipation.................................................................................................. 9
3.4 ESD Characteristics.............................................................................................................. 9
3.5 Buck Characteristics ........................................................................................................... 10
3.6 Performance and Supervision Characteristics.................................................................... 11
3.7 Digital I/O Characteristics.................................................................................................... 12
3.8 Timing Characteristics......................................................................................................... 13
3.9 Typical Performance ........................................................................................................... 14
4
Functional Description ............................................................................................................... 18
4.1 DC-DC Buck Converter....................................................................................................... 18
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
Switching Frequency ........................................................................................... 18
Operation Modes and Phase Selection............................................................... 18
Output Voltage Selection..................................................................................... 19
Soft Start-Up and Shutdown................................................................................ 19
Current Limit ........................................................................................................ 19
Thermal Protection .............................................................................................. 20
4.2 Internal Circuits ................................................................................................................... 21
4.2.1
4.2.2
4.2.3
IC_EN/Chip Enable/Disable................................................................................. 21
nIRQ/Interrupt...................................................................................................... 21
GPIO.................................................................................................................... 26
4.2.3.1
4.2.3.2
4.2.3.3
4.2.3.4
GPIO Pin Assignment...................................................................... 26
GPIO Function................................................................................. 26
Chip Configuration Select (CONF) .................................................. 28
OTP Reload (RELOAD)................................................................... 29
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.......................................................................................................... 30
5
Register Definitions .................................................................................................................... 32
5.1 Register Map....................................................................................................................... 32
5.1.1
5.1.2
System................................................................................................................. 34
Buck1................................................................................................................... 47
Datasheet
Revision 2.1
17-Sep-2020
CFR0011-120-00
3 of 62
© 2020 Dialog Semiconductor
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