2.5A, 500 kHz Asynchronous Buck Regulator with Wide Input Voltage and Low Iq

A8584

A8584 Package Image

The A8584 provides efficient step-down conversion for a wide input voltage range (4.7V-36V), delivering up to 2.5A output current. Features current-mode control, adjustable switching frequency, and comprehensive protection.

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Top Features

Packaging

  • Automotive AEC-Q100 qualified
  • Wide operating voltage range: 4.7 to 36 V
  • UVLO stop threshold is at 3.8 V (typ)
  • Supports 40 V input for surge and load dump testing
  • Adjustable output voltage as low as 0.8 V
  • Internal 800 mV reference with ±1.5% accuracy
  • Internal 100 mΩ high-side switching MOSFET
  • Adjustable switching frequency, fSW: 250 to 500 kHz
  • Synchronization to external clock: 1.2 × fSW to 1.5 × fSW
  • Sleep mode supply current less then 3 μA
  • Soft start time externally set via the SS pin
  • Very low no-load current
  • Pre-bias startup compatible
  • Power OK (POK) output
  • Pulse-by-pulse current limiting (OCP)
  • Hiccup mode short-circuit protection (HIC)
  • Overtemperature protection (TSD)
  • Open-circuit and adjacent pin short-circuit tolerant
  • Short-to-ground tolerant at every pin
  • Externally adjustable compensation
  • Stable with ceramic output capacitors

The A8584 device is available in a 16-pin TSSOP, (suffix LP), package with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.

LP Package Documentation

Part Number Specifications and Availability