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Texas Instruments LP3470A Ultra-Low Power Voltage Supervisor

Texas Instruments LP3470A Ultra-Low Power Voltage Supervisor is designed to monitor voltages within 1% of reset threshold overtemperature. This device is pin-to-pin compatible with the existing TI LP3470. The LP3470A device provides accurate, nano-power voltage monitoring with programmable delay. The device asserts a reset signal whenever the VCC supply voltage falls below a reset threshold. The reset time-out period is adjustable using an external capacitor. The reset remains asserted for an interval (programmed by an external capacitor) after VCC has risen above the threshold voltage plus hysteresis.

Features

  • Pin-to-pin compatible with LP3470
  • 5-pin SOT-23 package
  • Open-drain RESET output
  • Programmable reset time-out period using an external capacitor
  • Immune to short VCC transients
  • ±1% Reset threshold accuracy (typical)
  • Ultra-low quiescent current (0.3µA typical)
  • RESET valid down to VCC = 0.95V

Applications

  • Critical μP and μC power monitoring
  • Intelligent instruments
  • Computers
  • Building automation: building security system, video surveillance
  • Portable and battery-powered equipment
  • Factory automation: field transmitters, position, and proximity sensors
  • Motor drives

Functional Block Diagram

Block Diagram - Texas Instruments LP3470A Ultra-Low Power Voltage Supervisor
Published: 2019-12-04 | Updated: 2024-02-09