Compact Converters for Consumer Electronic Devices

The AP6507 and AP6508 synchronous DC/DC buck converters from Diodes Incorporated support the needs of low-voltage bus systems in electronic products such as monitors, LCD TVs and set-top boxes. Delivering a continuous load current of up to 3A, the converters offer designers of distributed power systems an operating efficiency as high as 90 per cent. With input voltage ranges of 4.5V to 18V and 4.5V to 21V respectively, these compact converters use a simple external resistor divider and their adjustable output can be set to any voltage down to as low as 0.8V.

To meet demands for increased power densities, the converters are provided in space-saving exposed pad package options: the AP6507 in SO-8EP and the AP6508 in DFN4030-14EP. By operating at a high switching frequency of 500kHz, the converters can also make use of smaller external components and, combined with the integration of high- and low-side MOSFET switches, internal compensation and protection features, enable significant PCB space savings.

The integrated over-current protection and thermal shutdown features of both DC/DC converters combine to increase system stability and achieve long-term reliability, according to the company. Additional features provided by the AP6508 include an externally programmable soft-start function and a power-good flag, enabling the implementation of power sequencing and ramp control. The AP6507 is priced at USD0.70 each in 10,000-piece quantities, while the AP6508 is priced at USD0.78 each in 10,000-piece quantities.

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