Allegro MicroSystems Inc. Automotive Wide Input Voltage 2A Buck Reg A8585KLKTR-T-2

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Automotive Wide Input Voltage 2A Buck Reg - A8585KLKTR-T-2 - Allegro MicroSystems Inc.
Manchester, NH, United States
Automotive Wide Input Voltage 2A Buck Reg A8585KLKTR-T-2
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 IQ mode, the A8585 family employs pulse frequency modulation (PFM) to draw less than 33 μA from 12 VIN while supplying 5 V/40 μA. When operational, the A8585 family operates down to at least 3.6 VIN (VIN falling). 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, VIN undervoltage lockout, and thermal shutdown. 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. Applications Automotive: Instrument Clusters Audio Systems Navigation HVAC Home Audio Network and Telecom Industrial Top Features 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 EXPAND ×

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 IQ mode, the A8585 family employs pulse frequency modulation (PFM) to draw less than 33 μA from 12 VIN while supplying 5 V/40 μA.

When operational, the A8585 family operates down to at least 3.6 VIN (VIN falling). 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, VIN undervoltage lockout, and thermal shutdown.

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.

Applications

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

Top Features

  • 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

EXPAND
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Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - A8585KLKTR-T-2-ND - Digi-Key Electronics
Thief River Falls, MN, USA
Voltage Regulators - DC DC Switching Regulators A8585KLKTR-T-2-ND
IC REG BUCK 5V 2A 10SOIC

IC REG BUCK 5V 2A 10SOIC

Supplier's Site Datasheet

Technical Specifications

  Allegro MicroSystems Inc. Digi-Key Electronics
Product Category IC Voltage Regulators IC Switching Voltage Regulators
Product Number A8585KLKTR-T-2 A8585KLKTR-T-2-ND
Product Name Automotive Wide Input Voltage 2A Buck Reg Voltage Regulators - DC DC Switching Regulators
Package Type SOIC; Other; 10-lead SOIC Other; 10-LSOP (0.154", 3.90mm Width) Exposed Pad
Operating Temperature -40 to 150 C (-40 to 302 F)
fsw 300 to 550 kHz
Output Voltage Type Fixed Fixed
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