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Four-channel power management chips are programmable

San Jose, Calif.—Summit Microelectronics has expanded its family of Programmable Power Manager (PPM) ICs with two devices targeted at higher-power consumer applications.

The SMB113A and SMB117 four-channel PPM chips enable system designers to digitally program the entire multiple output power supply and associated power management functions with a few clicks of a mouse compared to the hard-wired design of analog power devices.

The SMB113A and SMB117 offer four identical channels of PWM DC-DC step-down (buck) converters. The PWM channels on both devices are digitally programmable for output characteristics and monitoring, including voltage output levels to plus-or-minus 1.5 percent accuracy.

The SMB113A operates at a switching frequency of 800-kHz, and the SMB117's switching frequency is 400-kHz. Switching “dead-time” is adjustable and can be
programmed at the factory. The devices' high drive capability allows a current delivery of 10A or higher, while using a wide variety of industry-standard MOSFETs.

Complementing the precise power regulation is a suite of advanced power control features including: static and dynamic output voltage scaling and margining, independent channel sequencing/enable, and output slew rate control. The devices provide power system diagnostics, including I/O monitoring for under/over-voltage (UV/OV) conditions, as well as a RESET/HEALTHY monitor that eliminates the need for external RESET ICs.

Both products operate directly from 2.7-V to 6-V input; higher input voltages (two-cell Li-Ion or plus 12V) can also be accommodated in many cases with simple applications configuration. The SMB113A and SMB117 are offered in both the commercial and industrial temperature ranges, and in a thermally-enhanced 5mm-by-5mm, 32-pad QFN package that is lead-free and RoHS-standard compliant.

Applications include RAID cards, ADSL/Cable modems/routers, printers, DVD/MP3 portable media players/recorders, global positioning system receivers, car/marine navigation systems, high-definition televisions, LCD/TFT TVs/monitors, digital set-top boxes (STB) and digital video recorders.

Pricing: $2.26 each for the commercial temperature range and at $2.56 each for the
industrial temperature range in quantities of 1,000 units.
Availability: Production quantities.
Datasheets: SMB113A and SMB117.

Summit Microelectronics, 1-408-523-1000, www.summitmicro.com

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