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Maxim产品 - MAX1703介绍

MAX1703 - 1节至3节电池、大功率(1.5A)、低噪声、升压型DC-DC转换器

MAX1703是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX1703是1节至3节电池、大功率(1.5A)、低噪声、升压型DC-DC转换器，本站介绍了MAX1703的封装应用图解、特点和优点、功能等，并给出了与MAX1703相关的Maxim元器件型号供参考。

MAX1703 - 1节至3节电池、大功率(1.5A)、低噪声、升压型DC-DC转换器 - DC-DC开关调节器 - 紧凑的高效、低噪声升压转换器，带有增益电路 - 美信半导体

产品概述

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, 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.

For lower-power outputs and a smaller package, refer to the MAX1700/MAX1701. For dual outputs (step-up plus linear regulator), refer to the MAX1705/MAX1706. For an on-board analog-to-digital converter, refer to the MAX848/MAX849.

The MAX1703 evaluation kit is available to speed designs.

关键特性
  • 以下关键特性由Maxim美信半导体提供：
  • Up to 95% Efficiency
  • Up to 1.5A Output
  • Fixed 5V or Adjustable Step-Up Output (2.5V to 5.5V)
  • 0.7V to 5.5V Input Range
  • Low-Power Mode (300µW)
  • Low-Noise, Constant-Frequency Mode (300kHz)
  • Synchronizable Switching Frequency (200kHz to 400kHz)
  • 1µA Logic-Controlled Shutdown
  • Power-Good Comparator
  • Uncommitted Gain Block
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