| Attribute | Value |
|---|---|
| Topology | Synchronous buck-boost |
| Input Voltage | 3 V to 30 V |
| Output Voltage | 0.8 V to 22 V, 10 mV steps over I2C |
| Switching Frequency | 200 kHz to 2.2 MHz, synchronisable |
| Operating Temperature | -40 °C to +125 °C |
| Switch Current Limit | 8 A typical |
| Interface | I2C |
| Package Details | VQFN-HR (RYQ) 21-pin, 3 mm x 5 mm |
TPS55289RYQR is a Texas Instruments TPS55289 buck-boost converter in the 21-pin VQFN-HR package.
TI describes the TPS55289 as a synchronous buck-boost converter that integrates four MOSFET switches, converting battery or adapter voltage into regulated rails for USB Power Delivery designs.
The device covers 3 V to 30 V input and 0.8 V to 22 V output in 10 mV steps over I2C, with an 8 A switch current limit, 200 kHz to 2.2 MHz switching, and a -40 °C to +125 °C rating.
It is used in USB PD adapters, power banks and single-cell battery products that need a regulated rail above or below the input.
Its advantage is the programmable output: voltage and current limit are set over I2C, so one design covers several PD profiles without changing components.
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