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IC-Hersteller Allegro Microsystems

Allegro Microsystems A8590

Wide Input Voltage, 2.4 MHz, 3.0 A Asynchronous Buck Regulator With Low-IQ Standby, Sleep Mode, External Synchronization, and NPOR Output

Details

TopologieAbwärtswandler
Eingangsspannung4-35 V
Schaltfrequenz250-2400 kHz
Ausgang 15 V / 3 A
IC-Revision2

Beschreibung

Designed to provide the power supply requirements of nextgeneration car audio and infotainment systems, the A8590provides all the control and protection circuitry to produce ahigh current regulator with ±1.0% output voltage accuracy.The A8590 employs pulse frequency modulation (PFM) todraw less than 50 μA from 12 VIN while supplying 3.3 V/40μA. After startup, the A8590 operates down to at least 3.6 VIN(VIN falling).Features of the A8590 include a PWM/PFM mode control inputto enable PWM (logic high) or PFM (logic low). If the PWM/PFM input is driven by an external clock signal higher than thebase frequency (fOSC) the PWM frequency synchronizes to theincoming clock frequency. The SLEEP input pin commandsan ultra-low current shutdown mode requiring less than 5 μAfor internal circuitry and 10 μA (max) for MOSFET leakageat 16 VIN , 85ºC. The A8590 has external compensationto accommodate a wide range of frequencies and externalcomponents, and provides a power-on reset (NPOR) signalvalidated by the output voltage

Eigenschaften

Automotive AEC-Q100 qualified

  • Withstands surge voltages up to 40 V
  • Operates as low as 3.4 VIN (typ) with VIN decreasing
  • Utilizes pulse frequency modulation (PFM) to draw onlytens of microamperes from VIN while maintaining keepaliveVOUT
  • PWM/PFM mode control input pin
  • Delivers up to 3.0 A of output current with integrated 110mΩ high voltage MOSFET
  • SLEEP input pin commands ultra-low current shutdownmode
  • Adjustable output voltage with ±1.0% accuracy from0°Cto 85°C, ±1.5% from –40°C to 150°C
  • Programmable switching frequency: 250 kHz to 2.4 MHz
  • Synchronization capability: applying a clock inputto thePWM/PFM input pin will increase the PWMfrequency

Typische Anwendungen

  • Audio Systems,Navigation• Home audio
  • □□Instrument Clusters,HVAC

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Montageart Muster
74437346015SPEC
8 Dateien WE-LHMI SMT Speicherdrossel 1.5 9.1 11.2 27.6 13 15 45 SMT
Artikel Nr. Daten­blatt Simu­lation
74437346015SPEC
Muster
Artikel Nr. Daten­blatt Simu­lation Downloads ProduktserieL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Montageart Muster