深圳市润嘉泰电子是一家经销著名品牌的电子元器件专业供应商。由2010年成立，本着“客户第一，诚信至上”的原则.

    本公司主要销售：二三极管，电源ic，模拟开关，运算放大器，LED驱动，视频驱动，稳压器，单片机解密，ARM芯片解密，闪存系列,传感器、继电器、开关、电位器、保险器件、电子零器件、IC集成电路、等。

1至3节电池、大电流、低噪声、升压型DC-DC转换器，带有线性稳压器

低噪声、双输出转换器，为蜂窝电话中的PA、无线基带和逻辑电路供电

概述

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

With an internal synchronous rectifier, the MAX1705/MAX1706 deliver 5% better efficiency than similar non-synchronous converters. They also feature a pulse-frequency-modulation (PFM) standby mode to improve efficiency at light loads, and a 1μA shutdown mode. An efficiency-enhancing track mode reduces the step-up DC-DC converter output to 300mV above the linear-regulator output.

Both devices come in a 16-pin QSOP package, which occupies the same space as an 8-pin SO. Other features include two shutdown-control inputs for push-on/push-off control, and an uncommitted comparator for use as a voltage monitor.

关键特性

• Up to 96% Efficiency
• 1.1V_IN Guaranteed Startup
• Up to 850mA Output (MAX1705)
• Step-Up Output (2.5V to 5.5V Adjustable)
• Linear Regulator (1.25V to 5.0V Adjustable)
• PWM/PFM Synchronous-Rectified Topology
• 300kHz PWM Mode or Synchronizable
• 1μA Shutdown Mode
• Voltage Monitor
• Pushbutton On/Off Control

  应用/使用

  • 数字无绳电话
    
  • 手持式仪表(PDA、掌上电脑)
    
  • 掌上电脑
    
  • PCS电话
    
  • 个人通信装置
    
  • 双向寻呼
    
  • 无线手机
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