Features
- 2.5V to 5.5V input voltage
- 0.3V to 1.9V output voltage
- 4MHz 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 °C ambient temperature range
- Package: 24-WLCSP (2.5mm x 1.7mm, 0.4mm pitch)
Description
The DA9121 is a sub-PMIC suitable for supplying CPUs, GPUs, and 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 0.10μH inductor. It is capable of delivering up to 10A of output current at a 0.3V to 1.9V output voltage range. The 2.5V to 5.5V input voltage range is suitable for a wide variety of low-voltage systems, including, but not limited to, all Li-ion battery-supplied applications.
Benefits
- 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 the footprint and height of the 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
Parameters
| Attributes | Value |
|---|---|
| Function | 1-ch PMIC |
| Outputs (#) | 1 |
| Input Voltage (Min) (V) | 2.5 |
| Input Voltage (Max) (V) | 5.5 |
| Output Current Max (A) | 10 |
| Battery Interface | No |
| Integrated Battery Charger | No |
| USB-Power Management | No |
| Switching Frequency (MHz) | 4 - 4 |
| GPIOs (#) | 5 |
| Bus Voltage (Max) (V) | 5.5 |
| Integrated step-down DC/DC Converter Channels (#) | 1 |
| Step-up DC/DC converter Channels (#) | 0 |
| Total step-down DC/DC converter channels (#) | 1 |
| Comm. Interface | I2C |
| Parametric Applications | Smartphones, Infotainment, Wifi Modules |
Package Options
| Pkg. Type | Lead Count (#) | Pitch (mm) |
|---|---|---|
| 24 WLCSP | 24 | 0.4 |
Application Block Diagrams
 | High-Speed 5G to Wi-Fi Converter for CPE Convert 5G to Wi-Fi with dual-band 4T4R Wi-Fi 6, ideal for 5G routers and efficient networking. |
Additional Applications
- Smartphones
- Tablets
- Notebook PCs
- RF modules
- Solid-state drives
- Hard disk drives
- Game consoles
- Handheld devices