Space saving voltage regulators target space-constrained netcom and server applications
The new dual output devices are optimized for single rail operation from 5 V to 12 V inputs or 1 V to 21 V input with external 5 V bias. Available in a compact 5×6 mm PQFN package, the IR3891 and IR3892 offer an ultra-compact solution for applications requiring up to 4 A per channel and up to 6 A per channel respectively in as little as 165 mm2.
The IR3892 single-sided PCB designs are 46% smaller when compared with traditional designs that utilize two 6 A single output converters. The IR3892 also works comfortably with dual- sided designs, further reducing PCB board size to less than 30% of the space required in traditional designs.
The IR3891 and IR3892 feature a proprietary modulator scheme that enables jitter-free and noise-free operation to allow higher frequency/higher 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 two.
The IR3891 and IR3892 offer SupIRBuck standard features that include switching frequency up to 1.5 MHz and 1.0 Mhz respectively, pre-biased start-up, input voltage aware enable, over voltage protection, power good, optional true output voltage sensing for open line feedback and adjustable OVP, internal soft-start and minimum input voltage of 1.0 V (with ext. bias) and operating junction temperatures of -40°C to 125°C. This new device and the entire SupIRBuck family are industrial qualified ensuring robust designs for durable systems.
Availability and Pricing
Pricing for the IR3891 and IR3892 begins at $3.46 and $3.56 each respectively in 100,000-unit quantities. Pricing for the IRDC3891 and IRDC3892 SupIRBuck reference designs start at US $29 per kit. Production orders are available immediately.
A SupIRBuck Excel spreadsheet design tool and Icepak thermal model are available to facilitate design in addition to a user friendly, interactive, web-based selection and simulation tool at https://mypower.irf.com/SupIRBuck
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :
