XRP7659 PWM Step-Down Voltage Regulator

By MaxLinear 222

XRP7659 PWM Step-Down Voltage Regulator

MaxLinear's XRP7659 is a non-synchronous PWM step-down (buck) voltage regulator capable of delivering an output current up to 1.5 A. A wide 4.5 V to 18 V input voltage range allows for single supply operation from industry standard 5 V, 9.6 V, and 12 V power rails.

With a 1.4 MHz fixed operating frequency and current-mode control architecture, it provides fast transient response and achieves conversion efficiencies as high as 92%. An integrated soft-start prevents inrush current at turn-on, and in shutdown mode the supply current drops to 0.1 µA.

The XRP7659 offers the following protection schemes: output over voltage (open load), thermal shut-down, cycle-by-cycle over-current limit, and under voltage lockout (UVLO).

  • 1.5 A continuous output current
  • 4.5 V to 18 V input voltage range
  • PWM current-mode control
  • Adjustable output voltage
  • Enable function and soft start
  • Built-in thermal, over-current, UVLO, and output over-voltage protection
  • Pin/Function compatible to MP2359
  • RoHS compliant, Halogen-free, 6-pin SOT-23 package
  • Distributed power architectures
  • Point-of-Load converters
  • Audio-video equipment
  • Medical and industrial equipment

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