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MAX1678 - 1节至2节电池、低噪声、高效率、升压型DC-DC转换器

MAX1678是Maxim(美信半导体)旗下的一款DC-DC开关调节器产品,MAX1678是1节至2节电池、低噪声、高效率、升压型DC-DC转换器,并且具备高效1节电池升压转换器,用于寻呼设备,本站介绍了MAX1678的产品概述、关键特性、热门应用等,,并给出了与MAX1678相关的Maxim元器件型号供参考.

MAX1678 - 1节至2节电池、低噪声、高效率、升压型DC-DC转换器 - 高效1节电池升压转换器,用于寻呼设备 - Maxim(美信半导体)

产品概述

The MAX1678 is a high-efficiency, low-voltage, synchronous-rectified, step-up DC-DC converter intended for use in devices powered by 1 to 3-cell alkaline, NiMH, or NiCd batteries or a 1-cell lithium battery. It guarantees a 0.87V start-up voltage and features a low 37µA quiescent supply current.

The device includes a 1Ω, N-channel MOSFET power switch, a synchronous rectifier that acts as the catch diode, a reference, pulse-frequency-modulation (PFM) control circuitry, and circuitry to reduce inductor ringing-all in an ultra-small, 1.1mm-high µMAX® package.

The output voltage is preset to 3.3V or can be adjusted from +2V to +5.5V using only two resistors. Efficiencies up to 90% are achieved for loads up to 50mA. The device also features an independent undervoltage comparator (PFI/PFO) and a logic-controlled 2µA shutdown mode.

关键特性
  • 以下关键特性由Maxim美信半导体提供:
  • 0.87V Guaranteed Start-Up
  • Up to 90% Efficiency
  • Built-In Synchronous Rectifier (no external diode)
  • Ultra-Small µMAX Package, 1.1mm High
  • 37µA Quiescent Current (85µA from 1.5V battery)
  • 2µA Logic-Controlled Shutdown
  • Power-Fail Detector
  • Dual Mode™ Output: Fixed 3.3V
  • Dual Mode Adjustable 2V to 5.5V
  • 45mA Output Current at 3.3V for 1-Cell Input
  • 90mA Output Current at 3.3V for 2-Cell Input
  • Inductor-Damping Switch Suppresses EMI
  • 热门应用
  • 寻呼机
  • 个人医疗监视器
  • 指针设备
  • 远端控制
  • 单节电池供电设备
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