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Synchronous buck regulator reduces filter requirements

Posted: 20 Mar 2007     Print Version  Bookmark and Share

Keywords:regulator  MOSFET  EMI filter  Intersil  power management 

ISL8502 <a href=buck regulator from Intersil" ALIGN="RIGHT">

Intersil Corp. has launched the ISL8502, a 2.5A, wide input voltage synchronous buck regulator that reduces noise and EMI filter requirements through programmable switching frequency and external synchronisation. The integrated switching MOSFETs and a thermally enhanced compact 4-by-4mm QFN package make this device suitable for 5V/12Vin space-critical applications.

The ISL8502 features external synchronisation capability with master/slave configuration to enable the user to synchronise up to four ICs out of phase and reduce EMI in the design while also providing multiple outputs from the same input rail. The device's adjustable switching frequency range of 500kHz to 1.2MHz ensures high efficiency and a smaller number of external BOM components. External compensation provides additional flexibility and enables various choices of passive devices.

Target applications for the ISL8502 include POL applications, STBs, ADSL modems, switches, routers, graphics cards, FPGA power, ASICs and memory power supplies. The device is available in a 24-lead QFN package and is priced at Rs.97.51 ($2.21) each in 1,000-unit quantities.

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