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60V, 5A, Asynchronous Step-Down Converter with Programmable Frequency


The EUP3289 is a 60V, 5A, step down regulator with an integrated high side MOSFET. The EUP3289 adopting the peak current mode control, supports the PSM mode which assists the converter on achieving high efficiency at light load or standby condition.

The EUP3289 features programmable switching frequency from 100 kHz to 2MHz with an external resistor, which provides the flexibility to optimize either efficiency or external component size. The converter supports external clock synchronization with a frequency band from 160 kHz to 2MHz. The EUP3289 allows power conversion from high input voltage to low output voltage with a minimum 130ns on-time of highside MOSFET.

Fault protection includes secondary cycle-by-cycle current limit, short circuit protection and thermal shutdown. Internal soft-start minimizes the inrush supply current and the output overshoot at initial startup.

The EUP3289 is available in an 8-pin SOP-8(EP) package.


  • • Wide Input Voltage Range: 4.5V to 60V
  • • High Efficiency at Light Loads with PSM Mode
  • • 150μA Operating Quiescent Current
  • • 3μA Shutdown Current
  • • 100kHz to 2MHz Fixed Switching Frequency
  • • Synchronizes to External Clock
  • • Adjustable UVLO Voltage and Hysteresis
  • • 0.8V 1% Internal Voltage Reference
  • • Internal Soft-start
  • • Short Circuit Protection
  • • Thermal Shutdown
  • • SOP-8(EP) Package


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