The ISL6273EVAL1 evaluation board provides a convenient platform to evaluate the performance of the ISL6273 low quiescent high-efficiency step-down switching regulator. The ISL6273 is a 1.5MHz, 1.2A adjustable output voltage regulator. The output voltage is set by a resistor divider consisting of R1 and R2 on the board. The output voltage is set to 1.6V on the evaluation board but can be modified by changing the R2 value. The evaluation board also allows users to evaluate the forced PWM or PFM operation mode at light load and the behavior of the POR signal.


  • High-efficiency synchronous buck regulator with up to 95% efficiency
  • 200ms reset timer
  • Discharge output cap when shutdown
  • 2.7V to 5.5V supply voltage
  • 3% output accuracy over temperature/load/line
  • 1.2A guaranteed output current
  • 25µA quiescent supply current in IQ mode
  • Selectable forced PWM mode and IQ mode
  • Less than 1µA logic controlled shutdown current
  • 100% maximum duty cycle for lowest dropout
  • Internal loop compensation
  • Internal digital soft-start
  • Peak current limiting, short circuit protection
  • Over-temperature protection
  • Enable
  • Pb-free plus anneal available (RoHS compliant)



  • Single Li-ion battery powered equipment
  • DSP core power
  • PDAs


Type Title Date
Manual - Development Tools PDF 390 KB
Datasheet PDF 789 KB
2 items