Description:

The TPS55289-Q1 synchronous buck-boost converter is optimized to convert battery voltage or adapter voltage to a power rail. The TPS55289-Q1 integrates four MOSFET switches, providing a compact solution for USB Power Delivery (USB PD) applications. The TPS55289-Q1 has an input voltage of up to 36V. Through the I2C interface, the output voltage of the TPS55289-Q1 can be programmed from 0.8V to 22V in 10mV steps. In boost mode, it can deliver 60W of power with a 12V input voltage. It can deliver 45W of power from a 9V input voltage. The TPS55289-Q1 uses an average current-mode control scheme. The switching frequency can be programmed from 200kHz to 2.2MHz via an external resistor and can be synchronized to an external clock. The TPS55289-Q1 also offers a spread-spectrum option to minimize peak EMI. The TPS55289-Q1 provides output overvoltage protection, average inductor current limit, cycle-by-cycle peak current limit, and output short-circuit protection. The TPS55289-Q1 also ensures safe operation under sustained overload conditions through selectable output current limit and hiccup-mode protection. The TPS55289-Q1 can use small inductors and capacitors with high switching frequencies. It is available in a 3.0mm × 5.0mm QFN package.

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) supports USB Power Delivery (USB PD)

– Wide input voltage range: 3.0V to 36V

– Programmable output voltage range: 0.8V to 22V in 10mV steps

– ±1% reference voltage accuracy

– Adjustable output voltage compensation for cable voltage drop

– Programmable output current limit up to 6.35A in 50mA steps

– ±5% precision output current monitoring

– I2C interface

• High efficiency across the entire load range

– 96% efficiency at VIN = 12V, VOUT = 20V, and IOUT = 3A

– Programmable PFM and FPWM modes at light load

• Avoid frequency interference and crosstalk

– Optional clock synchronization

– Programmable switching frequency range from 200kHz to 2.2MHz

• Reduced EMI

– Optional programmable spread spectrum

– Leadless package

• Rich protection features

– Output overvoltage protection

– Output short-circuit protection with hiccup mode

– Thermal shutdown protection

– 8A average inductor current limit

• Small solution size

– Switching frequency up to 2.2MHz (maximum)

– 3.0mm × 5.0mm HotRod™ QFN package

Applications:

• Automotive chargers

• USB PD

• Wireless chargers

• Automotive infotainment systems and instrument clusters

• Automotive rear lighting

• Advanced Driver Assistance Systems (ADAS)