A boost type embedded inductor DC-DC converter with small-size and high efficiency

This paper proposes a boost type embedded inductor DC-DC converter module in order to realize the small-size, high efficiency and convenient use as a boost type voltage regulator. The proposed converter module consists of a boost converter controller IC chip with built-in switching devices and an inductor in one package. The body size and volume of the proposed prototype converter module is less than 6.25 mm² and 5.63 mm³. Since only two capacitors are needed as external parts, the convenience is the same as series regulator. Proposed DC-DC converter module achieves high efficiency up to 93% and is suitable for applications of 1-cell lithium-ion battery inputs. This converter module can realize an advantageous small-size power supply against charge-pump especially at large load current.