1 Cell ( One AA Battery ) To 5V @ 1A Step Up DC-DC Converter Using MAX1703

1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (1)

The DC-DC converter board has been designed around MX1703 IC from Maxim. 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 5V output from battery inputs, such as one to three NiCd/NiMH cells or one Li-Ion cell. The device includes a 2A, 75mΩ, N-channel MOSFET switch and a 140mΩ, P-channel synchronous rectifier.

With its internal synchronous rectifier, the MAX1703 delivers up to 5% better efficiency than similar nonsynchronous converters. It also features a pulse-frequency-modulation (PFM) low-power mode to improve efficiency at light loads, and a 1µA shutdown mode.

The MAX1703 comes in a 16-pin narrow SO package and includes an uncommitted comparator that generates a power-good or low-battery-warning output. It also contains a linear gain block that can be used to build a linear regulator.

DOC

Key Features

  • Input Supply 1 Cell AA Battery
  • Output 5V DC
  • Up to 95% Efficiency
  • Up to 1A Output
  • Low-Power Mode (300µW)
  • Low-Noise, Constant-Frequency Mode (300kHz)

Applications

  • Digital Cordless Phones
  • Handheld Instruments (PDAs, Palmtops)
  • Palmtop Computers
  • PCS Phones
  • Personal Communicators
  • Two-Way Paging
  • Wireless Handsets

 

1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (2) 1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (1) 1 Cell-Battery to 5V Step Up DC-DC Converter Using MAX1703 (3)

 

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