MAX77271 - Multimode PA Step-Down Converter

Maxim Integrated (now Analog Devices)

Datasheet Details

Part number	MAX77271
Manufacturer	Maxim Integrated (now Analog Devices)
File Size	3.42 MB
Description	Multimode PA Step-Down Converter
Datasheet	MAX77271 Datasheet

General Description

The MAX77271 step-down converter is optimized for powering the power amplifier (PA) in multistandard handsets such as LTE, WCDMA, TD-SCDMA, GSM, and EDGE.

The device integrates a high-efficiency PWM stepdown converter for medium- and low-power transmission with an 85mΩ (typ) low dropout (LDO) bypass regulator, in parallel with the step-down converter, enabling highpower transmission.

The IC uses an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment.

Overview

MAX77271 Multimode PA Step-Down Converter with Linear Bypass Mode.

Key Features

PA Step-Down Converter.
7µs (typ) Settling Time for 0.7V to 3.4V Output Voltage Change.
Dynamic Output Voltage Setting from 0.5V to VIN.
85mΩ PFET and 100% Duty Cycle for Low Dropout.
3MHz Switching Frequency.
Low Output Voltage Ripple.
2% Output Voltage Accuracy Over Load, Line, and Temperature.
Tiny External Components.
2.5A Output Current Capability.
Simple Logic On/Off Control.
Low 0.

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