Automotive 2A Buck Regulator with Low Iq Mode and PFM/PWM Control

A8585

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The A8585 offers efficient and quiet power conversion for automotive applications, with selectable PWM/PFM modes for optimized light-load efficiency and a sleep mode for ultra-low standby current.

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Top Features

Packaging

  • Automotive AEC-Q100 qualified
  • Withstands surge input to 40 VIN for load dump
  • Operates down to 3.4 VIN (typ), 3.6 VIN (max) for idle stop
  • Utilizes pulse frequency modulation (PFM) for low IQ mode
  • Function options:
    • Selectable PWM / Low IQ PFM mode, or
    • Selectable 10 μA Sleep mode (automatic PWM / Low IQ PFM mode selection)
  • Fixed output voltage options: 3.3 V or 5 V with ±1.0% accuracy
  • Delivers up to 2 A of output current
  • Integrated 110 mΩ high-side MOSFET
  • Adjustable switching frequency from 300 to 550 kHz (to 605 kHz with sync)
  • EMI Reduction Features:
    • Frequency dithering
    • Controlled switching node
  • External synchronization capability
  • Active low NPOR output with 7.5 ms delay
  • Pre-bias startup capable: VOUT increases monotonically, will not cause a reset
  • External compensation for maximum flexibility
  • Stable with ceramic or electrolytic output capacitors
  • Internally fixed soft start time of 5 ms
  • Pulse-by-pulse current limit, hiccup mode short circuit, and thermal protections
  • Pin open/short and component fault tolerant
  • -40°C to 150°C operating junction temperature range
  • Thermally enhanced SOIC-10 surface mount package

Typical Applications

The A8585 is supplied in a 10-pin SOIC package (suffix LK) with exposed power pad. It is lead (Pb) free, with 100% matte-tin leadframe plating.

LK Package Documentation

Part Number Specifications and Availability