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AAT2148 - Fast Transient 1A Step-Down Converter

General Description

The AAT2148 SwitchReg is a 2MHz step-down converter with an input voltage range of 2.7V to 5.5V and output voltage as low as 0.6V.

It is optimized to react quickly to a load variation.

The AAT2148 incorporates a unique low noise architecture which reduces ripple and spectral noise.

Key Features

  • VIN Range: 2.7V to 5.5V.
  • Low Noise Light Load Mode.
  • Low Ripple PWM Mode.
  • VOUT Fixed or Adjustable from 0.6V to VIN.
  • 37μA No Load Quiescent Current.
  • Up to 98% Efficiency.
  • 1A Max Output Current.
  • 2MHz Switching Frequency.
  • 150μs Soft Start.
  • Fast Load Transient.
  • Over-Temperature Protection.
  • Current Limit Protection.
  • 100% Duty Cycle Low-Dropout Operation.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DATA SHEET AAT2148 Low-Noise, Fast Transient 1A Step-Down Converter General Description The AAT2148 SwitchReg is a 2MHz step-down converter with an input voltage range of 2.7V to 5.5V and output voltage as low as 0.6V. It is optimized to react quickly to a load variation. The AAT2148 incorporates a unique low noise architecture which reduces ripple and spectral noise. The AAT2148 is available in fixed voltage versions with internal feedback and a programmable version with external feedback resistors. It can deliver 1A of load current while maintaining a low 37μA no load quiescent current. The 2MHz switching frequency minimizes the size of external components while keeping switching losses low.