1 Features

• AEC-Q100 qualified:

– Device temperature grade 1: –40°C to +125°C

ambient operating temperature range

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Programmable power supply (PPS) support for

USB power delivery (USB PD)

– Wide input voltage range: 3.0V to 36V

– Programmable output voltage range: 0.8V to

22V with 10mV step

– ±1 reference voltage accuracy

– Adjustable output voltage compensation for

voltage droop over the cable

– Programmable output current limit up to 6.35A

with 50mA step

– ±5 accurate output current monitoring

– I2C interface

• High efficiency over entire load range

– 96 efficiency at VIN = 12V, VOUT = 20V and

IOUT = 3A

– Programmable PFM and FPWM mode at light

load

• Avoid frequency interference and crosstalk

– Optional clock synchronization

– Programmable switching frequency from

200kHz to 2.2MHz

• EMI mitigation

– Optional programmable spread spectrum

– Lead-less package

• Rich protection features

– Output overvoltage protection

– Hiccup mode for output short-circuit protection

– Thermal shutdown protection

– 8A average inductor current limit

• Small solution size

– Maximum switching frequency up to 2.2MHz

– 3.0mm × 5.0mm HotRod™ QFN package

2 Applications

• Car charger

• USB PD

• Wireless charger

• Automotive infotainment and cluster

• Automotive rear lighting

• Advanced driver-assistance system (ADAS)

3 Description

The TPS55289-Q1 is a synchronous buck-boost

converter that is optimized for converting battery

voltage or adapter voltage into power supply rails.

The TPS55289-Q1 integrates four MOSFET switches

providing a compact solution for USB Power Delivery

(USB PD) application.

The TPS55289-Q1 has up to 36V input voltage

capability. Through the I2C interface, the output

voltage of the TPS55289-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 TPS55289-Q1 employs an average currentmode

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 TPS55289-Q1 also provides optional spread

spectrum to minimize peak EMI.

The TPS55289-Q1 offers output over-voltage

protection, average inductor current limit, cycle-bycycle

peak current limit and output short circuit

protection. The TPS55289-Q1 also ensures safe

operating with optional output current limit and hiccupmode

protection in sustained overload conditions.

The TPS55289-Q1 can use a small inductor and

small capacitors with high switching frequency. It is

available in a 3.0mm × 5.0mm QFN package.