ZHCSNR7A March 2022 – August 2022 TPS55289
PRODUCTION DATA
The TPS55289 can operate over a wide range of 3.0-V to 30-V input voltage and output 0.8 V to 22 V. The device can transition among buck mode, buck-boost mode, and boost mode smoothly according to the input voltage and the setting output voltage. The TPS55289 operates in buck mode when the input voltage is greater than the output voltage and in boost mode when the input voltage is less than the output voltage. When the input voltage is close to the output voltage, the TPS55289 operates in one-cycle buck and one-cycle boost mode alternately. The switching frequency is set by an external resistor. To reduce the switching power loss in high power conditions, set the switching frequency below 500 kHz. If a system requires higher switching frequency above 500 kHz, set the lower switch current limit for better thermal performance.