The SR50 is a family of 5-bit adjustable synchronous, step-down switching regulators for CPU power. The 5-bit digital-to-analog converter (DAC) programs the output voltage required by most VRM converters specified by CPU manufacturers. The output can also be customer defined. The synchronous rectifiers operate at 400kHz switching frequency, which can be synchronized to an external clock. Other standard features include over/under input voltage protection, thermal protection, short circuit protection, output overvoltage crowbar, burst or continuous mode operation, power good and transient loop optimization. The multiplayer PCB minimizes thermal resistance. The input voltage range of these converters can be from 3.3Vin to 12Vin with standard input ranges of 3.3, 5 and 12Vin. The output can be programmed by the VID codes to conform to VRM 8.1 to 8.4 output voltage or be set to any other customer-specified programmable output within 0.9Vout to 5Vout. The standard output VID programmable range is 0.9Vout to 2Vout or 1.3Vout to 3.5Vout. Ideal for Desktop Computers, Notebook and Palmtop Computers, Personal Digital Assistants (PDA), Mobile Intel® Pentium® II and III CPUs, Low-voltage Adjustable Power Supplies, and Reference Supplies for DDR SDRAM.