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LTC3408 - Synchronous Step-Down Regulator

Features

  • Dynamically Adjustable Output from 0.3V to 3.5V.
  • 600mA Output Current.
  • Internal 0.08Ω P-Channel MOSFET Bypass Transistor.
  • High Efficiency: Up to 96%.
  • 1.5MHz Constant Frequency Operation.
  • No Schottky Diode Required.
  • Low Dropout Operation: 100% Duty Cycle.
  • 2.5V to 5V Input Voltage Range.
  • Shutdown Mode Draws < 1µA Supply Current.
  • Current Mode Operation for Excellent Line and Load Transient Response.
  • Overtemperature Protected.
  • Available in.

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Full PDF Text Transcription

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LTC3408 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor U U FEATURES ■ Dynamically Adjustable Output from 0.3V to 3.5V ■ 600mA Output Current ■ Internal 0.08Ω P-Channel MOSFET Bypass Transistor ■ High Efficiency: Up to 96% ■ 1.5MHz Constant Frequency Operation ■ No Schottky Diode Required ■ Low Dropout Operation: 100% Duty Cycle ■ 2.5V to 5V Input Voltage Range ■ Shutdown Mode Draws < 1µA Supply Current ■ Current Mode Operation for Excellent Line and Load Transient Response ■ Overtemperature Protected ■ Available in 8-Lead 3mm × 3mm DFN Package U APPLICATIO S ■ WCDMA Cell Phone Power Amplifiers ■ Wireless Modems DESCRIPTIO The LTC®3408 is a high efficiency monolithic synchronous buck regulator optimized for WCDMA power amplifier applications.
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