A2550 Allegro MicroSystems, Inc., A2550 Datasheet - Page 8

• Manufacturer Part Number: A2550
• Description: Relay Driver With 5 V Regulator For Automotive Applications
• Manufacturer: Allegro MicroSystems, Inc.

A2550
Timing Diagram: Initial Start-up and Exiting Sleep Mode
1.
2.
3.
4.
VREG5
ENBAT
CPOR
NPOR
OUTx
EN or
CWD
VBB
WDI
5 V signal to wake up microcontroller.
OUTx enabled with first watchdog pulse.
Power ramp-up sequence with watchdog active.
NPOR inactive, but outputs not enabled until watchdog detected.
1
t
POR
Internal V
ref
Internal V
ref
2
Relay Driver with 5 V Regulator
~INx
for Automotive Applications
3
t
POR
4
~INx
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
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