A8586, A8586-1, A8586-2: Wide Input Voltage, Adjustable Frequency, 3.5 Amp Buck Regulator

The A8586 is a high frequency step-down switching regulator with an integrated high-side power MOSFET. It provides up 3.5 A output current. The A8586 can achieve fast transient response utilizing current mode control and simple external compensation.

The wide input range of 3.8 V to 36 V makes the A8586 suitable for a wide range of step-down applications, including those in an automotive input environment. Battery driven applications benefit from the low 30 μA operational quiescent current.

The A8586 provides maintains high efficiency across a wide load range by the use of pulse frequency modulation (PFM) as the load reduces. This in turn reduces switching and gate driver losses at light load. A8586-1 and A8586-2 are options that disable the PFM function. A8586-1 also disables the dithering feature. These can be useful when low output ripple and minimum output capacitance is required.

Frequency fold back helps prevent inductor current runaway during startup and provides enhanced dropout performance. Extensive protection features of the A8586 include pulse-by-pulse current limit, hiccup mode short circuit protection, open/ short freewheeling diode protection, BOOT open/short voltage protection, VIN undervoltage lockout, and thermal shutdown.

The A8586 and A8586-2 are designed to aid in EMC/EMI design by including frequency dithering, soft freewheel diode turn off, and well controlled switch node slew rates. A 4 MHz oscillator allows the A8586 to switch outside EMI sensitive frequencies bands such as the AM band or ADSL bands.

The A8586 is available in industry standard DFN10 or SOIC8 packages.

Applications

  • High Voltage Power Conversion
  • Automotive Systems
  • Industrial Power System
  • Distributed Power Systems
  • Battery Powered Systems
DATASHEETS
SAMPLE & BUY

Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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  • Features and BenefitsFeatures and Benefits
  • PackagingPackaging
  • Technical DocsTechnical Docs
  • NewsNews
  • Automotive AEC-Q100 qualified
  • Supply voltage from 3.8 V to 36 V
  • Output voltage adjustable from 0.8 V to 30 V
  • Maximized duty cycle for low dropout operation
  • Low 30 μA operational quiescent current
  • 150 mΩ integrated MOSFET switch
  • Programmable switching frequency up to 4 MHz
  • Improved EMC with frequency dithering (A8586 and A8586-2) and controlled switch node rise and fall times
  • Ceramic capacitor stable
  • Internal soft start
  • Over current protection
Packages

Design Support Tools

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Product Image Functional Block Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
APEK8586KLJ-01-MH DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock
APEK8586KLJ-01-MH-1 DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock
APEK8586KLJ-01-MH-2 DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock
A8586KEJTR-T 10-lead DFN -40°C to 125°C Yes View Data Contact your
local sales rep
Check Stock
A8586KLJTR-T 8-lead SOIC -40°C to 125°C Yes View Data Contact your
local sales rep
Check Stock
A8586KLJTR-T-1 8-lead SOIC -40°C to 125°C Yes View Data Contact your
local sales rep
Check Stock
A8586KLJTR-T-2 8-lead SOIC -40°C to 125°C Yes View Data Contact your
local sales rep
Check Stock

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