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发布者:来自网络 发布时间:2010/1/19 阅读:6698次    关键字: 晶鎂 白光LED驅動器 EMD3001 可攜式應用
EMD3001-Low Noise, Charge Pump DC/DC Converter


EMD3001-Low Noise,Regulated Charge Pump DC/DC Converter DataSheet

General Description
    Two times charge pump and constant switching frequency
configuration with low noise characteristics, low external
components makes the EMD3001 unique performance and
perfect for the portable applications. Fixed regulated
output voltage (EMD3001) is available for different
applications with input voltage range from 2.7V to 4.5V and
provide up to 100mA of output current.
    Soft-start circuitry, preventing the inrush current, thermal
shutdown and short circuit protection are all built-in as well.
It also features with <1uA low showdown current when the
device is disable.
    The EMD3001 is available in a 6-pin SOT-26 and TDFN-2x2- 6
package (fixed 5V output).

Features
  Low Noise Constant Frequency Operation (2MHz)
  100mA Output Current
  Power Range form 2.7V to 4.5V
  Shutdown Current < 1μA
  Needs No Inductors
  Soft Start Function Reduces Inrush Current And Has Slew Rate Control
  Output Voltage Regulates to 5V ± 4% or Adj.
  Uses Small Ceramic Capacitor of 1μF
  Thermal Shutdown Protects Output Over Loading
  Protects Output Shorted to Ground
  PWM dimming Control WLED Brightness
  5V Fixed Version in SOT-26

Applications
  White LED Driver
  3V to 5V Charge Pump Conversion
  Battery Backup Supplies
  Handheld Portable Devices

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