Automotive, 27V 8A buck-boost converter with I²C interface

The TPS55189-Q1 is a synchronous buck-boost converter that is optimized for converting battery voltage or adapter voltage into power supply rails. The TPS55189-Q1 integrates four MOSFET switches providing a compact solution for USB Power Delivery (USB PD) application.

The TPS55189-Q1 has up to 27V input voltage

capability. Through the I2C interface, the output voltage of the

TPS55189-Q1 can be programmed from 0.8V to 22V with 10mV step. When working in boost

mode, it can deliver 60W from a 12V input voltage. It is capable of delivering 45W

from 9V input voltage.

The TPS55189-Q1 employs an average current-mode

control scheme. The switching frequency is

programmable from 200kHz to 2.2MHz by an external

resistor and can be synchronized to an external

clock. The TPS55189-Q1 also provides optional

spread spectrum to minimize peak EMI.

The TPS55189-Q1 offers output over-voltage

protection, average inductor current limit,

cycle-by-cycle peak current limit and output short

circuit protection. The TPS55189-Q1 also ensures

safe operating with optional output current limit

and hiccup-mode protection in sustained overload

conditions.

The TPS55189-Q1 can use a small inductor and small

capacitors with high switching frequency. It is

available in a 3.0mm × 5.0mm QFN package.