描述 Description

Large numbers of relay-based applications require the use of a microprocessor which implements complex system control. In these systems, there is the need for microprocessor logic supply voltage, power-on reset circuitry, and watchdog capabilities. The Allegro? A2550 combines the functions of voltage regulator, watchdog, and reset, as well as three low-side DMOS relay driver outputs. Primarily targeted at automotive applications, this IC is designed to provide robust performance over extended voltage and temperature ranges.

Features and Benefits

? Three independent low-side DMOS output drivers

? Short-circuit protection of drivers

? Eliminates need for flyback diodes on relays

? Thermal shutdown

? Separate precision 5 V regulator (2)

? Current clamp on 5 V regulator

? 16-pin TSSOP package with exposed thermal pad

? Programmable reset (NPOR) delay time

? Programmable watchdog

? Automotive voltage and temperature ranges

? Active clamps for automotive load dump specifications

? Lead (Pb) free