The TPS552882-Q1 is a 16-A buck-boost DC-to-DC converter with the two boost MOSFETs integrated. The TPS552882-Q1 can operate over a wide range of 2.7-V to 36-V input voltage and 0.8-V to 22-V output voltage. It can transition among buck mode, buck-boost mode, and boost mode smoothly according to the input voltage and the set output voltage. The TPS552882-Q1 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 TPS552882-Q1 operates in one-cycle buck and one-cycle boost mode alternately.

The TPS552882-Q1 uses an average current mode control scheme. Current mode control provides simplified loop compensation, rapid response to the load transients, and inherent line voltage rejection. An error amplifier compares the feedback voltage with the internal reference voltage. The output of the error amplifier determines the average inductor current.

An internal oscillator can be configured to operate over a wide range of frequency from 200 kHz to 2.2 MHz. The internal oscillator can also synchronize to an external clock applied to the DITH/SYNC pin. To minimize EMI, the TPS552882-Q1 can dither the switching frequency at ±7% of the set frequency.

The TPS552882-Q1 works in fixed-frequency PWM mode at moderate to heavy load currents. In light load condition, the TPS552882-Q1 can be configured to automatically transition to PFM mode or be forced in PWM mode by either connecting a resistor at the MODE pin or setting the corresponding bit in an internal register.

On TPS552882-Q1, you can use an external resistor divider to program the output voltage. The TPS552882-Q1 also can limit the output current by placing a current sense resistor in the output path. These two functions support the programmable power supply (PPS) feature of the USB-PD.

The TPS552882-Q1 provides average inductor current limit set by a resistor at the ILIM pin. In addition, it provides cycle-by-cycle peak inductor current limit during transient to protect the device against overcurrent condition beyond the capability of the device.

A precision voltage threshold of 1.23 V with 5-μA sourcing current at the EN/UVLO pin supports programmable input undervoltage lockout (UVLO) with hysteresis. The output overvoltage protection (OVP) feature turns off the high-side FETs to prevent damage to the devices powered by the TPS552882-Q1.

The device provides hiccup mode option to reduce the heating in the power components when output short circuit happens. When the hiccup mode is enabled, the TPS552882-Q1 turns off for 76 ms and restarts at soft start-up.