Quality Standards and Environmental Certifications

A8585: Wide Input Voltage, 2 A Buck Regulator Family with Low IQ Mode

A8585 Datasheet
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Description

The A8585 family is designed to provide the power supply requirements of next generation car audio and infotainment systems. The A8585 family provides all the control and protection circuitry to produce a high current regulator with ±1% output voltage accuracy.

In PWM mode, the A8585 family employs current mode control to provide simple compensation, excellent stability, and fast transient response. In Low IQmode, the A8585 family employs pulse frequency modulation (PFM) to draw less than 33 μA from 12 VINwhile supplying 5 V/40 μA.

When operational, the A8585 family operates down to at least 3.6 VIN(VINfalling). The selectable Sleep mode feature allows for very low standby current.

Features of the A8585 family include a programmable PWM switching frequency. The regulator switching frequency can be synchronized to an external clock. The A8585 has external compensation to optimize stability and transient response for a wide range of external components and applications. The A8585 has a fixed soft start time of 5 ms.

Extensive protection features of the A8585 include pulse-by-pulse current limit, hiccup mode short circuit protection, open/short asynchronous diode protection, BOOT open/short voltage protection, VINundervoltage lockout, and thermal shutdown.

A8585中提供一个10-pin SOIC包(超自然ffix LK) with exposed power pad. It is lead (Pb) free, with 100% matte-tin leadframe plating.

亚博尊贵会员

  • Automotive:
    • Instrument Clusters
    • Audio Systems
    • Navigation
    • HVAC
  • Home Audio
  • Network and Telecom
  • Industrial

Top Features

  • Automotive AEC-Q100 qualified
  • Withstands surge input to 40 VINfor load dump
  • Operates down to 3.4 VIN(typ), 3.6 VIN(max) for idle stop
  • Utilizes pulse frequency modulation (PFM) for low IQmode
  • Function options:
    • Selectable PWM / Low IQPFM mode, or
    • Selectable 10 μA Sleep mode (automatic PWM / Low IQPFM 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: VOUTincreases 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
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Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant		 Part Composition /
RoHSData		 Comments Samples Check Stock
APEK8585KLK-01-MH DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep		 Check
Distributor Stock
A8585KLKTR-T 10-lead SOIC -40°C to 150°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A8585KLKTR-T-1 10-lead SOIC -40°C to 150°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A8585KLKTR-T-2 10-lead SOIC -40°C to 150°C Yes View Data Contact factory Contact your
local sales rep		 Check
Distributor Stock
A8585KLKTR-T-3 10-lead SOIC -40°C to 150°C Yes View Data Contact factory Contact your
local sales rep		 Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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