International Rectifier's IR3891 SupIRBuck® integrated dual-output voltage regulators are designed for space-constrained netcom, server and storage applications
The IR3891 dual-output device is optimized for single-rail operations from 5 V to 12 V inputs, or 1 V to 21 V input with external 5 V bias. The IR3891 is available in a compact 5 x 6 mm PQFN package, and offers an ultra-compact solution for applications requiring up to 4 A per channel, and up to 6 A per channel in as little as 165 mm². The IR3891 features a proprietary modulator scheme that enables jitter and noise-free operation to allow higher frequency and bandwidth operation for better transient response, and fewer output capacitors to reduce overall system size. Other key features include interleaved phases to reduce input capacitance, powertrain isolation to eliminate crosstalk, and sequencing capability on channel 2.