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Configurable, 10A Dual-Phase SubPMIC for high performance mobile processors and memory


10A, Dual Phase I2C Controlled SubPMIC

DA9121 is a SubPMIC suitable for supplying CPUs, GPUs, DDR memory rails in smartphones, tablets, RF modules and other handheld applications.

DA9121 operates as a single-channel dual-phase buck converter, each phase requiring a small external 0.10 μH inductor. It is capable of delivering up to 10A output current at a 0.3 V to 1.9 V output voltage range. The 2.5 V to 5.5 V input voltage range is suitable for a wide variety of low voltage systems, including, but not limited to, all Li-Ion battery supplied applications.

Lifecycle status

● Active


2.5 V to 5.5 V input voltage

0.3 V to 1.9 V output voltage

4 MHz nominal switching frequency

±1 % accuracy (static)

±5 % accuracy (dynamic)

I2C-compatible interface (FM+)

Configurable GPIOs

Programmable soft-start

Voltage, current, and temperature supervision

-40 °C to +85 ºC ambient temperature range


Input voltage range provides flexibility to run from single cell Li-Ion battery or standard 3.3V or 5V system rail  

Differential voltage sensing provides tight regulation accuracy requirements of CPU cores in mobile SoCs 

4MHz switching frequency reduces footprint & height of output inductor and minimizes output capacitance, lowering BOM cost

Triggered through either an I2C or GPIO interface, output dynamic voltage control can be used to optimize system power consumption




Notebook PCs

RF Modules

Solid State Drives

Hard Disk Drives

Game Consoles

Handheld Devices


24WLCSP (2.5 x 1.7 mm, 0.4 mm pitch)

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Product Briefs and Summaries
Name Date Version
DA9121 / DA9122 Product Brief (711.15 KB)
Name Date Version
DA9121 Datasheet (1.38 MB) 18/09/2020 2.3
Application notes
Name Date Version
AN-PM-140: DA9217/DA9220/DA9121/DA9122 - Adjusting VOUT above 1.9 V (529.73 KB)
Software drivers
Name Date Version
DA9130-A ,DA9131-A, DA9121, DA9217, DA9122, DA9220 Linux Driver (438.42 KB) (Registered users only) 11/08/2020 1r1
User guides and manuals
Name Date Version
UM-PM-041 DA9217/DA9121 and DA9220/DA9122 EVB Kits (1.22 MB)
Development Tools
Name Date Version
Smartcanvas GUI for DA9217/DA9220/DA9121/DA9122 (85.25 MB) (Registered users only)

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1 year ago

DA9121 - QFN version available ?

Posted by johnno1168+99@… 20 points 2 replies