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Power manager IC supports entry-level GSM/CDMA phones

Posted: 21 Mar 2006     Print Version  Bookmark and Share

Keywords:AS3653  power management IC  austriamicrosystems  Vince Biancomano 

austriamicrosystems' AS3653 provides virtually complete power-with-power-management support for the entry-level GSM and CDMA phone market. "Strong growth in the entry-level phone market is being driven by the increasing demand in underdeveloped countries for affordable phones," said Ronald Tingl, marketing manager for smart power management. "These phones are intended to cover the bare necessities of a mobile phone, namely excellent voice quality and outstanding operating time. The AS3653 provides functions that expand operating time to its maximum, at an outstanding price point, meeting the aggressive bill-of-material challenge of entry level phones."

The AS3653 includes 10 low-dropout voltage regulators. It has a complete chemistry-independent battery charger that features autonomous trickle charge mode, programmable constant current charging as well as constant voltage and pulse charging, integrated gas gauge, over-voltage protection and operation without battery. The chip also includes a backup battery charger, LED lighting support, accessory detection, real time clock, microphone biasing, SIM card I/F with enhanced ESD protection, pulse-width modulation output and eight general purpose input/output lines.

The LDOs, individually optimised for powering the phone's analogue, digital, and RF components, are all programmable in 50 or 100mV steps via the chip's serial interface for dynamic power management. Users can also programme LED light patterns, system control functions such as reset generation and interrupt control, charger modes, and the GPIOs.

The AS3653, in a 6-by-6mm QFN package, is priced at Rs.88.50 ($2) each in 1,000-unit quantities.

- Vince Biancomano

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