MB3829 is a system power supply IC from Fujitsu. It is mainly used in mobile phones. It integrates a 4-channel low-saturation voltage series regulator and a battery backup function. It also integrates a speaker amplifier and a buzzer driver. This chip can provide excellent performance and power consumption for the power system of the mobile phone, while also greatly reducing the size of the mobile phone.
The Fujitsu MB3829 is an integrated circuit designed specifically as a system power supply for mobile telephone applications. It incorporates a 4-channel series regulator with low-saturation voltage types, a battery backup function to maintain clocks and memory during main power loss, and momentary power-loss detection circuits.
In addition to power regulation, the MB3829 includes built-in audio drivers, such as a BTL amplifier for driving speakers (up to 90 mW typical) and a buzzer driver. The device is housed in a 48-pin plastic LQFP package and offers features like ON/OFF switch control with error prevention and independent watchdog timer settings.
| Power consumption during standby | 0.22 mW (typ.) |
|---|---|
| Regulator output voltage | 3.0 V |
| Speaker amplifier output power | 90 mW typ. |
| Package type | 48-PIN PLASTIC LQFP |
The BTL amplifier for driving the speaker has a typical output power of 90 mW.
Yes, it incorporates a battery backup function to recharge button-type lithium secondary batteries when the main battery is installed.