Allegro Microsystems


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

Topologie: Buck
Eingangsspannung (min.): 4.00 V
Eingangsspannung (max.): 35.00 V
Schaltfrequenz (min.): 300.00 kHz
Schaltfrequenz (max.): 550.00 kHz
Ausgang 1: 5.00 V / 2.000 A

Erstveröffentlichung am 07.03.2014, Version 3


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 ±1.0% 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 5.0 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.


  • 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 IQmode
  • Function options:– Selectable PWM / Low IQ PFM 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 2.0 A of output current
  • ntegrated 110 mΩ high-side MOSFET
  • Adjustable switching frequency from 300 to 550 kHz (to605 kHz with sync)– Frequency dithering– Controlled switching node
  • External synchronization capability


  Artikel Nr. SPEC Produktserie L
RDC typ.
RDC max.
Bauform Version Muster
744770122 PDF WE-PD SMT-Speicherdrossel 22 4.1 5 33 43 12 1280 Standard

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • A8585-2
    Topologie: Other, Schaltfrequenz (min.): 300.00 kHz, Schaltfrequenz (max.): 550.00 kHz