The TPS548B28 device is a high-efficiency, single-channel, small-sized, synchronous-buck converter. The device suits low output voltage point-of-load applications with 20-A or lower output current in server, storage, and similar computing applications. The TPS548B28 features proprietary D-CAP3 control mode combined with adaptive on-time architecture. This combination builds modern low-duty-ratio and ultra-fast load-step-response DC/DC converters in an ideal fashion. The output voltage ranges from 0.6 V to 5.5 V. The conversion input voltage ranges from 2.7 V to 16 V and the VCC input voltage ranges from 3.13 V to 3.6 V. The D-CAP3 control mode uses emulated current information to control the modulation. An advantage of this control scheme is that it does not require a phase-compensation network outside which makes the device easy-to-use and also allows low external component count. Another advantage of this control scheme is that it supports stable operation with all low-ESR output capacitors (such as ceramic capacitor and low ESR polymer capacitor). Adaptive on-time control tracks the preset switching frequency over a wide range of input and output voltages while increasing switching frequency as needed during load-step transient.