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XRP7675 - 3A 18V Synchronous PFM/PWM Step-Down Regulator

Description

The XRP7675 is a 3A capable synchronous current-mode PWM step down (buck) voltage regulator with improved light current load efficiency.

A wide 4.5V to 18V input voltage range allows for single supply operations from industry standard 5V and 12V power rails.

Features

  • 3A Continuous Output Current.
  • 4.5V to 18V Wide Input Voltage  0.925V to 16V Adjustable Output Voltage  ±2% Output Voltage Accuracy.
  • PWM Current-Mode Control  340kHz Constant Operations  Up to 95% Efficiency.
  • Light-Load Efficiency  Discontinuous Conduction Mode (DCM)  Pulse Frequency Modulation Mode (PFM).
  • Programmable Soft-Start and Enable Function.
  • Built-in Thermal, Over-Current, UVLO, Output Over-Voltage and hiccup mode short-circuit protection.
  • RoHS C.

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XRP7675 3A 18V Synchronous PFM/PWM Step-Down Regulator February 2013 GENERAL DESCRIPTION The XRP7675 is a 3A capable synchronous current-mode PWM step down (buck) voltage regulator with improved light current load efficiency. A wide 4.5V to 18V input voltage range allows for single supply operations from industry standard 5V and 12V power rails. With a 340kHz constant operating frequency and integrated high and low-side 100mΩ/100mΩ MOSFETs, the XRP7675 reduces the overall component count and solution footprint. Current-mode control provides fast transient response and cycle-bycycle OCP. An adjustable soft-start prevents inrush current at turn-on, and in shutdown mode the supply current drops to 0.1µA.