A81805: 40 V, 2.5 A, Synchronous Buck Regulator with Low EMI and 6 µA Quiescent Current

Description

The A81805 is a powerful synchronous buck regulator that offers high efficiency over the full load of up to 2.5A. This regulator's unique architecture reduces the amount of EMI generated by the switching components to minimize the number of external components. The A81805 has a very low 6uA quiescent current which will help maximize battery life in standby mode. The input voltage range is wide enough to survive many transients in automotive and industrial applications and not turn off when the voltage drops.

Top Features

  • Wide input voltage range: 3.5V to 40V
  • AEC-Q100 Grade 0 qualified
  • High efficiency: 92%, 12 to 5V at 1A
  • Low EMI: spread spectrum dithering
  • Wide switching frequency range: 250kHz to 2.5MHz
  • Up to 2.5A continuous output current

Typical Applications:

 

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
APEK81805KES-01-MH DEMO BOARD -20°C to 85°C No -- New Contact your
local sales rep
Check
Distributor Stock
APEK81805KES-01-MH-1 DEMO BOARD -20°C to 85°C No -- New Contact your
local sales rep
Check
Distributor Stock
A81805KESJSR 20-lead QFN -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
A81805KESJSR-1 20-lead QFN -40°C to 150°C Yes View Data New 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.

Allegro 20-Pin 4mmx4mm QFN ES with wettable flank package

Packaging

20-contact QFN (suffix ES) 4 mm × 4 mm × 0.75 mm with exposed thermal pad and wettable flank.

ES Package Documentation