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高频、稳压型、200mA、反相电荷泵

稳压型反向电荷泵,可提供200mA负压电流,无需电感

产品详情

主要特征

Parametric specs for Charge Pumps
Topology Inverter
Regulated
VIN (V) (min) 2.7
VIN (V) (max) 5.5
IOUT (A) (typ) 0.2
Unadj. VOUT (V) -VIN
Adj. VOUT (V) (min) -VIN
Adj. VOUT (V) (max) -2.5
ICC (mA) (max) 7
Switching Frequency (kHz) 500
Oper. Temp. (°C) -40 to +85
Package/Pins See Data Sheet
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参量

Parametric specs for Charge Pumps
Topology Inverter
Regulated
VIN (V) (min) 2.7
VIN (V) (max) 5.5
IOUT (A) (typ) 0.2
Unadj. VOUT (V) -VIN
Adj. VOUT (V) (min) -VIN
Adj. VOUT (V) (max) -2.5
ICC (mA) (max) 7
Switching Frequency (kHz) 500
Oper. Temp. (°C) -40 to +85
Package/Pins See Data Sheet

主要特征

  • 200mA Output Current
  • Up to 2MHz Switching Frequency
  • Small Capacitors (1µF)
  • +2.7V to +5.5V Input Voltage Range
  • Adjustable Regulated Negative Output (-2.5V to -VIN)
  • 0.1µA Logic-Controlled Shutdown
  • Low 0.05Ω Output Resistance (in regulation)
  • Soft-Start and Foldback Current Limited
  • Short-Circuit and Thermal Shutdown Protected
  • 8-Pin SO Package

应用/用途

  • 电池供电应用
  • 便携式摄像机
  • 数码相机
  • 硬盘驱动器
  • 测量仪表
  • TFT板

描述

The MAX889 inverting charge pump delivers a regulated negative output voltage at loads of up to 200mA. The device operates with inputs from 2.7V to 5.5V to produce an adjustable, regulated output from -2.5V to -VIN.

The MAX889 is available with an operating frequency of 2MHz (T version), 1MHz (S version), or 0.5MHz (R version). The higher switching frequency devices allow the use of smaller capacitors for space-limited applications. The lower frequency devices have lower quiescent current.

The MAX889 also features a 0.1µA logic-controlled shutdown mode and is available in an 8-pin SO package. An evaluation kit, MAX889SEVKIT, is available.

简化框图

MAX889:典型工作电路 MAX889:典型工作电路 Zoom icon

Technical Docs

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心