Diodes Inc. has introduced a pair of highly integrated synchronous dc-dc buck converters. The AP6502 and AP6503 are designed for use in consumer electronics systems such as digital TV, LCD monitors, and set-top boxes, which require ultra-efficient voltage conversion.
Capable of handling continuous load currents of up to 2A or 3A, respectively, the AP6502 and AP6503 can support 12-V and 5-V bus systems and are able to achieve efficiency rates as high as 95%. The output voltage is set using an external resistor divider, which can accommodate any output voltage setting down to 0.925V.
With a switching frequency of 340 kHz, and incorporating low-RDS(on) high- and low-side power MOSFETS which reduce the need for external components, both devices offer an efficient, space-saving solution, particularly effective for distributed power architectures. In addition, the parts include an external, programmable soft start control input that reduces excess current during initial power-up of the application. The combination of Enable and programmable SoftStart helps in systems requiring power sequencing.
Integrated Over Current Protection (OCP) and thermal shutdown features stabilize the system and ensure long-term reliability. Provided in a SO-8EP package option, the AP6502 and AP6503 dc-dc converters are priced at $US0.25 and $US0.32 respectively, in quantities of 10k units.
