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MAX887 - 100% Duty Cycle / Low-Noise / Step-Down / PWM DC-DC Converter

General Description

The MAX887 high-efficiency, step-down DC-DC converter provides an adjustable output from 1.25V to 10.5V.

It accepts inputs from 3.5V to 11V and delivers 600mA.

Operation to 100% duty cycle minimizes dropout voltage (300mV typ at 500mA).

Key Features

  • o 95% Efficiency o 600mA Output Current o Cycle-by-Cycle Current Limiting o Low-Dropout, 100% Duty-Cycle Operation, 300mV at 500mA o Internal 0.6Ω (typ) MOSFET o Internal Synchronous Rectifier o High-Frequency Current-Mode PWM o External SYNC or Internal 300kHz Oscillator o Guaranteed 260kHz to 340kHz Internal Oscillator Frequency Limits o 2.5µA Shutdown Mode _______________General.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1142 Rev 0; 9/96 ANUAL N KIT M IO T A U EVAL BLE AVAILA 100% Duty Cycle, Low-Noise, Step-Down, PWM DC-DC Converter ____________________________Features o 95% Efficiency o 600mA Output Current o Cycle-by-Cycle Current Limiting o Low-Dropout, 100% Duty-Cycle Operation, 300mV at 500mA o Internal 0.6Ω (typ) MOSFET o Internal Synchronous Rectifier o High-Frequency Current-Mode PWM o External SYNC or Internal 300kHz Oscillator o Guaranteed 260kHz to 340kHz Internal Oscillator Frequency Limits o 2.5µA Shutdown Mode _______________General Description The MAX887 high-efficiency, step-down DC-DC converter provides an adjustable output from 1.25V to 10.5V. It accepts inputs from 3.5V to 11V and delivers 600mA. Operation to 100% duty cycle minimizes dropout voltage (300mV typ at 500mA).