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