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MAX1706 - 1- to 3-Cell / High-Current / Low-Noise / Step-Up DC-DC Converters

General Description

The MAX1705/MAX1706 are high-efficiency, low-noise, step-up DC-DC converters with an auxiliary linearregulator output.

These devices are intended for use in battery-powered wireless applications.

Key Features

  • include two shutdown-control inputs for push-on/push-off control, and an uncommitted comparator for use as a voltage monitor. ANUAL N KIT M IO T A U EVAL BLE AVAILA ____________________________Features o Up to 96% Efficiency o 1.1VIN Guaranteed Start-Up o Up to 850mA Output (MAX1705) o Step-Up Output (2.5V to 5.5V adjustable) o Linear Regulator (1.25V to 5.0V adjustable) o PWM/PFM Synchronous-Rectified Topology o 300kHz PWM Mode or Synchronizable o 1µA Shutdown Mode o Voltage Monitor o Pushbut.

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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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19-1198; Rev 0; 4/97 1- to 3-Cell, High-Current, Low-Noise, Step-Up DC-DC Converters with Linear Regulator _______________General Description The MAX1705/MAX1706 are high-efficiency, low-noise, step-up DC-DC converters with an auxiliary linearregulator output. These devices are intended for use in battery-powered wireless applications. They use a synchronous rectifier pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from battery inputs, such as 1 to 3 NiCd/NiMH cells or 1 Li-Ion cell. The MAX1705 has an internal 1A N-channel MOSFET switch. The MAX1706 has a 0.5A switch. Both devices also have a built-in low-dropout linear regulator that delivers up to 200mA.