Digital control solutions for switched-mode power supplies (SMPS), traditionally adopted in industrial power systems as well as in high-reliability and mission-critical applications, have recently been introduced in the market of low cost consumer electronics. Digital control ICs inherently have a high degree of programmability and versatility, which allows them to offer features not commonly available in conventional analog solutions. Among these, efficiency maximization strategies for portable and battery-operated equipments, self-tuning capabilities for automatic calibration of the control system, or diagnostic routines for online health monitoring functions. However, digital controllers still fail to be competitive against their analog counterparts in terms of achievable closed-loop dynamic performances. Finite A/D conversion and computational delays, PWM-related delays and quantization effects significantly limit the closed-loop control bandwidth in a digitally controlled SMPS. In this speech, two main topics related to digital control of SMPS are covered, mainly focusing on DC-DC coverters targeted for low voltage, high current applications. The multiple sampling technique is first introduced as a non-conventional sampling strategy, which allows to achieve analog-like performances by strongly reducing the PWM-related delay. Secondly, an auto-tuning technique for automatic calibration of the compensator parameters is discussed. The technique, based on the relay-feedback concept, has been specifically developed to ensure accurate and repeatable tuning results, still maintaining the low hardware complexity dictated by the market of consumer applications.