MB3829 - Fujitsu Media Devices

MB3829 System Power Supply

System Power Supply IC for Mobile Telephone 48-PIN PLASTIC LQFP (FPT-48P-M05) This power supply IC incorporates a 4 - channel series regulator and a battery backup function. It is a multi - function power supply IC with an output control function and momentary power - loss detection circuit, which are both required for mobile telephones. It also incorporat.

Features

Power consumption during standby 4 - channel low - saturation voltage type series regulator Battery backup function Momentary power - loss and power - restoration functions ON/OFF switch circuit with an operating error prevention function BTL amplifier for driving the speaker : Output power= 90 mW typ. Buzzer driver to permit changing the sound volume : 200 mA max. Power supply voltage drops are accurately detected. Hysteresis is provided for detection voltage. Watchdog timer stop function is provided (inhibit pin). Watchdog monitoring time and reset time are set independently. : 0.22 mW (typ..