ATA6405 Datasheet, PDF (1/12 Pages) ATMEL Corporation – 12/24V SYSTEM POWER SUPPLY IC

Features
• Input Voltage: 8 V to 40 V
• Output Voltage Linear Regulator: 5 V/50 mA/3 mA
• ON_NOFF (High Active) Input
• Window Watchdog
• OFF Mode Quiescent current < 10 µA
• Standby Mode Quiescent Current < 30 µA
• Temperature Range: -40° C to 125°C
• Reset Logic
• Select Pin Standby/OFF Mode
Description
The ATA6405 is a fully integrated system voltage supply IC. The device is designed for
the 12/24 V board voltage system in a motor vehicle. In order to minimize power con-
sumption, a switching regulator generates a voltage for supplying the internal linear
regulator with a 5 V output voltage for microcontrollers.
To monitor the microcontroller, provision has been made for a window watchdog fea-
ture incorporating a reset logic function. The voltage system IC has three modes:
active, Standby and OFF. One control input serves to facilitate the selection between
the active and Standby modes. Another input permits the selection between the
Standby and OFF modes. In the OFF mode, a maximum quiescent current of less
than 10 µA flows through the system and in Standby mode quiescent current less than
30 µA.
12/24 V System
Power Supply IC
ATA6405
Preliminary
Rev. 4737B–AUTO–08/04