STMicroelectronics

A5973AD

Up to 1.5 A step down switching regulator for automotive applications

Topologie: Buck
Eingangsspannung (min.): 4.00 V
Eingangsspannung (max.): 36.00 V

Erstveröffentlichung am 12.08.2014, Version 9 vom

Beschreibung

The A5973AD is a step-down monolithic power switching regulator with a minimum switch current limit of 1.8 A, so it is able to deliver up to 1.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to VIN. The high current level is also achieved thanks to an HSOP8 package with an exposed frame, that allows to reduce the Rth(JA)down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical RDS(on)of 250 mΩ) as a switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 500 kHz. Having a minimum input voltage of 4 V only it fits the automotive applications requiring the device operation even in cold crank conditions. A pulse-by-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

Merkmale

  • Qualified following the AEC-Q100
  • requirements (see PPAP for more details) 1.5 A DC output currentOperating input voltage from 4 V to 36 V
  • 3.3 V / (± 2%) reference voltage
  • Output voltage adjustable from 1.235 V to VIN
  • Low dropout operation: 100% duty cycle
  • 500 kHz internally fixed frequency
  • Voltage feed-forward
  • Zero load current operation
  • Internal current limiting
  • Inhibit for zero current consumption
  • Synchronization
  • Protection against feedback disconnection
  • Thermal shutdownREMARKS:-TABLE 8 INDUCTOR

Artikel

  Artikel Nr. SPEC Produktserie L
(µH)
L1
(µH)
IR
(A)
IR 1
(A)
ISAT
(A)
ISAT 1
(A)
RDC typ.
(Ω)
RDC max.
(Ω)
RDC1 typ
(Ω)
RDC1 max.
(Ω)
fres
(MHz)
fres 1
(MHz)
Montageart Muster
74456122 PDF WE-PD4 SMT-Speicherdrossel 22 22 2.6 2.6 3.1 3.1 0.071 0.095 0.071 0.095 14 14 SMT
74456133 PDF WE-PD4 SMT-Speicherdrossel 33 33 2.3 2.3 2.6 2.6 0.094 0.12 0.094 0.12 13 13 SMT
74456115 PDF WE-PD4 SMT-Speicherdrossel 15 15 2.9 2.9 3.6 3.6 0.043 0.06 0.043 0.06 17 17 SMT