General Description

The MAX77178/MAX77179 step-down converters are optimized for powering the power amplifier (PA) in multimode/multiband handsets for 3G/4G applications such as LTE, WCDMA, as well as other RF PA applications

such as Wi-FiMand WiMAXM. 

Features

 Meet 3G/4G Timing and RF Spectrum Mask Requirements

 20µs (typ) Settling Time for 0.5V to 3.4V Output Voltage Change

 30µs (typ) Settling from Enable to 95 Output Voltage Regulation

 Four Selectable Output Voltages with Logic Inputs (MAX77178 Only)

 Analog Controlled Output Voltage Settings from 0.5V to VIN (MAX77179 Only)

 1A Peak Output Current Capability

 ±3 Output Voltage Accuracy

 Allows Use of Small (1210) 0.47µH Inductor

 100 Duty-Cycle Operation

 Simple Logic On/Off Controls

 < 1µA Shutdown Supply Current

 2.5V to 5.5V Supply Voltage Range

 Overcurrent and Overtemperature Protection

Applications

LTE, WCDMA Cell Phones/Smartphones /Tablets/Data Cards