Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8581 and MAX8582
Edited by the Electronicstalk Editorial
Team on 13 November 2006
Step-down convertors deliver high
currents
Maxim Integrated Products has released the MAX8581 and MAX8582 high-efficiency, step-down DC/DC convertors that can continuously deliver 600mA.
Maxim Integrated Products has released the MAX8581 and MAX8582 high-efficiency, step-down DC/DC convertors that can continuously deliver 600mA Available in a tiny 9mm2 package, these devices integrate a 65mohm bypass FET
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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During high-power transmission, this bypass FET connects the power amplifier (PA) directly to the battery with a dropout of 33mV at 500mA, thus minimising power loss at the inductor and allowing minimal battery voltage for device usage.
To maximise PA efficiency, the output can be dynamically varied from 0.4V to the input level, depending on the distance to the basestation and the desired transmission mode (voice or data).
This flexibility improves efficiency by 47% at +10dBm.
Consequently, handset designers can almost double talk-time and/or reduce battery sise.
The MAX8581 and MAX8582 are capable of switching at 2.5MHz, and the MAX8582 also runs at 1.5MHz for lower switching losses.
Both devices are optimised for use with a tiny, low-cost inductor and small ceramic capacitors.
The MAX8581 and MAX8582 are packaged in 3 x 3 x 0.8mm, 10-pin TDFN packages and are specified over the extended temperature range (-40 to +85C).
Prices start at US $1.48 (2500-up, FOB USA).
An evaluation kit is available to speed designs.
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