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MAX886

Maxim
Part Number MAX886
Manufacturer Maxim
Description Wireless and Satellite Handset Power-Management ICs
Published May 2, 2005
Detailed Description 19-1438; Rev 0; 3/99 NUAL KIT MA ATION EET H S A EVALU T WS DA O L L O F Wireless and Satellite Handset Power-Manageme...
Datasheet PDF File MAX886 PDF File

MAX886
MAX886

Overview
19-1438; Rev 0; 3/99 NUAL KIT MA ATION EET H S A EVALU T WS DA O L L O F Wireless and Satellite Handset Power-Management ICs Features o 90% Efficient, 500mA Step-Down Converter o Two 100mA DAC-Controlled LDOs One 200mA DAC-Controlled LDO One 20mA DAC-Controlled LDO o 3 to 6-Cell NiCd or NiMH 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-Compatible Serial Interface o Selectable 375kHz, 535kHz, 670kHz, 925kHz (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 complete power systems for wireless and satellite handsets.
The devices operate from 3 to 6-cell NiCd/NiMH 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.
The step-down converter and linear regulator outputs are adjustable by internal 4-bit DACs, programmable through the I2C™compatible serial interface.
A pushbutton on/off scheme activates a 5µA low-power shutdown mode.
The devices also feature a low-battery detector output and an internal start-up timer.
The MAX886/MAX888 differ in output voltage range and power-on reset voltage.
The MAX886 has a higher preset voltage range and is intended for 2-cell Li-Ion or 5/6-cell NiCd/NiMH batteries.
The MAX888 has a lower preset voltage range and is intended for 1-cell Li-Ion or 3/4-cell NiCd/NiMH batteries.
Both devices are available in a space-saving, 32-pin TQFP package.
MAX886/MAX888 Applications Satellite Phones Wireless Handsets Private Mobile Radio (PMR) GSM Cellular/PCS Telephones PART MAX886ECJ* MAX888ECJ Ordering Information TEMP.
RANGE -40°C to +85°C -...


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