MAX1798
Features o One 300m A Low-Noise LDO o Four 150m A Low-Noise LDOs o 45µVRMS Noise from 10Hz to 100k Hz o >60d B Crosstalk Isolation Below 10k Hz o >60d B PSRR Below 10k Hz o 125m V (max) Dropout (OUT1 at 200m A) o 100m V (max) Dropout (OUT2- 5 at 100m A) o Programmable Output Voltages 1.8V to 3.3V in 32 Steps o 140ms (min) Reset Timer o SPI- or I2C-patible Serial Interface o Push-On/Push-Off Control Logic o Two 150m A General Purpose Open-Drain Outputs o Overcurrent and Thermal Protection (all LDOs) o 1µA Shutdown Current o 20-Pin Thermally-Enhanced TSSOP or QFN Packages
General Description
The MAX1798/MAX1798A/MAX1799/MAX1799A system power supplies are designed specifically for CDMA cellular/PCS handsets. Each device contains five lowdropout linear regulators (LDOs), a 140ms (min) reset timer, a serial interface, push-on/push-off control logic, and two general-purpose open-drain outputs. Only the serial interface is different between the MAX1798/ MAX1798A/MAX1799/MAX1799A: the MAX1798/ MAX1798A...
