1 Features
• Programmable power supply (PPS) support for
USB power delivery (USB PD)
– 3.0-V to 30-V wide input voltage range
– 0.8-V to 22-V with 10-mV step programmable
output voltage range
– ±1% reference voltage accuracy
– Adjustable output voltage compensation for
voltage droop over the cable
– Programmable output current limit up to 6.35 A
with 50-mA step
– ±5% accurate output current monitoring
– I2C interface
• High efficiency over entire load range
– 96% efficiency at VIN = 12 V, VOUT = 20 V, and
IOUT = 3 A
– Programmable PFM and FPWM mode at light
load
• Avoid frequency interference and crosstalk
– Optional clock synchronization
– Programmable switching frequency from 200
kHz to 2.2 MHz
• 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
– 8-A average inductor current limit
• Small solution size
– Maximum switching frequency up to 2.2 MHz
– 3.0-mm × 5.0-mm HotRod™ QFN package

2 Applications
• Wireless charger
• USB PD
• Docking station
• Industrial PC
• Power bank
• Monitor

3 Description
The TPS55289 is a synchronous buck-boost
converter that is optimized for converting battery
voltage or adapter voltage into power supply rails.
The TPS55289 integrates four MOSFET switches,
providing a compact solution for USB power delivery
(USB PD) application.
The TPS55289 has up to 30-V input voltage
capability. Through the I2C interface, the output
voltage of the TPS55289 can be programmed from
0.8 V to 22 V with 10-mV step. When working in boost
mode, the device can deliver 60 W from 12-V input
voltage. It is capable of delivering 45 W from 9-V input
voltage.
The TPS55289 employs an average current-mode
control scheme. The switching frequency is
programmable from 200 kHz to 2.2 MHz by an
external resistor and can be synchronized to an
external clock. The TPS55289 also provides optional
spread spectrum to minimize peak EMI.
The TPS55289 offers output overvoltage protection,
average inductor current limit, cycle-by-cycle peak
current limit, and output short circuit protection.
The TPS55289 also makes sure it safely operates
with optional output current limit and hiccup-mode
protection in sustained overload conditions.
The TPS55289 can use a small inductor and
small capacitors with high switching frequency. It is
available in a 3.0-mm × 5.0-mm QFN package.