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MAX1703 Datasheet 1-cell To 3-cell / High-power 1.5a / Low-noise / Step-up DC-dc Converter

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-1336; Rev 2; 11/98 NUAL KIT MA ATION EET H S A EVALU T WS DA FOLLO 1-Cell to 3-Cell, High-Power (1.

General Description

The MAX1703 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications.

It uses a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate a 2.5V to 5.5V output from battery inputs, such as one to three NiCd/NiMH cells or one Li-Ion cell.

The device includes a 2A, 75m Ω , N-channel MOSFET switch and a 140mΩ, P-channel synchronous rectifier.

Key Features

  • o Up to 95% Efficiency o Up to 1.5A Output o Fixed 5V or Adjustable Step-Up Output (2.5V to 5.5V) o 0.7V to 5.5V Input Range o Low-Power Mode (300µW) o Low-Noise, Constant-Frequency Mode (300kHz) o Synchronizable Switching Frequency (200kHz to 400kHz) o 1µA Logic-Controlled Shutdown o Power-Good Comparator o Uncommitted Gain Block ________________General.

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