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MAX8896 - Dual PWM Step-Down Converter

Datasheet Summary

Description

The MAX8896 dual step-down converter is optimized for powering the power amplifier (PA) and RF transceiver in WCDMA handsets.

Features

  • include separate output enables, lowsupply current shutdown, output overcurrent, and overtemperature protection. The MAX8896 is available in a 16-bump, 2mm x 2mm UCSP™ package (0.7mm max height). Features o PA Step-Down Converter (OUT1) 7.5µs (typ) Settling Time for 0.5V to 1V Output Voltage Change Dynamic Output Voltage Setting from 0.5V to VBATT 140mΩ Bypass PFET and 100% Duty Cycle for Low Dropout 2MHz Switching Frequency Low Output Voltage Ripple 700mA (min) Output Drive Capability 2% Gain.

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Datasheet preview – MAX8896

Datasheet Details

Part number MAX8896
Manufacturer Maxim Integrated Products
File Size 490.23 KB
Description Dual PWM Step-Down Converter
Datasheet download datasheet MAX8896 Datasheet
Additional preview pages of the MAX8896 datasheet.

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Full PDF Text Transcription

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19-4663; Rev 0; 5/09 www.DataSheet4U.com Dual PWM Step-Down Converter in a 2mm x 2mm Package for WCDMA PA and RF Power General Description The MAX8896 dual step-down converter is optimized for powering the power amplifier (PA) and RF transceiver in WCDMA handsets. This device integrates a highefficiency PWM step-down converter (OUT1) for medium and low-power transmission, and a 140mΩ (typ) bypass FET to power the PA directly from the battery during high-power transmission. A second highefficiency PWM step-down converter (OUT2) supplies power directly to a high PSRR, low output noise, 200mA low-dropout linear regulator (LDO) to power the RF transceiver. Fast switching allows the use of small ceramic input and output capacitors while maintaining low ripple voltage.
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