MAX1703

1節至3節電池、大功率(1.5A)、低噪聲、升壓型DC-DC轉換器

緊湊的高效、低噪聲升壓轉換器，帶有增益電路

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概述

參數規格

設計資源

質量與環境

訂購

說明

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.

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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.

MAX1703：典型工作電路MAX1703：典型工作電路放大+

關鍵特性

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

應用

數字無繩電話

手持式儀表(PDA、掌上電腦)

掌上電腦

PCS電話

個人通信裝置

雙向尋呼

無線手機

相關資料

相關產品

封裝信息

技術文檔

參考設計