MAX1817:紧凑的、高效率、双输出、升压型DC-DC转换器

The MAX1817 is a compact, high-efficiency, dual-output step-up converter for portable devices that provides both the main logic supply and the LCD bias. The device operates from an input voltage of +1.5V to +5.5V, allowing the use of 2- or 3-cell alkaline batteries, or 1-cell lithium-ion (Li+) batteries. The MAX1817's main regulator supplies 125mA at either a preset 3.3V or an adjustable 2.5V to 5.5V output voltage with up to 88% efficiency. A 0.1µA shutdown state also minimizes battery drain. The MAX1817's secondary step-up converter provides the LCD bias voltage and is adjustable up to +28V. Other features include a fast switching frequency to reduce the size of external components and a low quiescent current to maximize battery life. Both outputs can be independently shut down for improved flexibility. The MAX1817 is supplied in a compact 10-pin µMAX package. The MAX1817 evaluation kit (MAX1817EVKIT) is available to speed up design.

关键特性
  • Dual Step-Up Converter in a Tiny 10-Pin µMAX Package
  • Main Output
    • Up to 125mA Load Current
    • Fixed 3.3V or Adjustable 2.5V to 5.5V
    • Up to 88% Efficiency
    • Internal Switch
  • LCD Output
    • Up to 28V for LCD Bias
    • Internal Switch
  • Input Voltage Range +1.5V to +5.5V
  • Minimal External Components Required
  • 0.1µA Logic-Controlled Shutdown
  • Low 15µA Quiescent Supply Current
MAX1817:典型工作电路
MAX1817:典型工作电路
应用
  • GPS接收机
  • MP3播放器
  • 数字助理/转换器
  • PDA
数据手册DataSheet
语言下载文件备注
英文MAX1817.pdfRev 0; 02/2001
关键参数
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesLCD/LED/Flash/CCD FeaturesVIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX1817Step-UpShutdown
  • Current Limit
  • Internal Switch
TFT Bias1.55.52.5280.1250.125500µMAX/10$1.93 @1k
开发工具
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1817EUB停止供货MAX1817EUB+µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1817EUB+生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1817EUB+T生产中µMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:无铅
MAX1817EUB-T停止供货MAX1817EUB+TµMAX,;10引脚;15.4mm²-40°C至+85°CRoHS/无铅:否
MAX1817.pdf MAX1817
典型工作电路 MAX1817