MAX886
Features o 90% Efficient, 500m A Step-Down Converter o Two 100m A DAC-Controlled LDOs One 200m A DAC-Controlled LDO One 20m A DAC-Controlled LDO o 3 to 6-Cell Ni Cd or Ni MH Operation 1 or 2-Cell Li-Ion Operation o +2.7V to +12V Input Voltage Range o 250µA Standby (PFM) Quiescent Current o 5µA Shutdown Current o I2C-patible Serial Interface o Selectable 375k Hz, 535k Hz, 670k Hz, 925k Hz (or Synchronizable) Switching Frequency o Power-On Reset and Start-Up Timer o Thermal Overload Protection o Pushbutton On/Off Control o Space-Saving 32-Pin TQFP Package (7mm x 7mm)
General Description
The MAX886/MAX888 power-management ICs are plete power systems for wireless and satellite handsets. The devices operate from 3 to 6-cell Ni Cd/Ni MH batteries or from 1 or 2-cell Li-Ion batteries. They incorporate a high-efficiency, step-down DC-DC converter, a regulated 5V charge pump, and four linear regulators. The regulators supply power to the SIM, LCD, BB, DSP, and RF sections of a cellular telephone handset....
