LP3470 Active-low reset IC with programmable delay & 1% reset threshold | TI.com

LP3470 (NRND) Active-low reset IC with programmable delay & 1% reset threshold

 

Not Recommended for New Designs (NRND)

Replaced By TPS3840 – The device has the SAME FUNCTIONALITY as the compared device, but is not pin-for-pin equivalent and may not be parametrically equivalent. 350-nA nano power voltage supervisor with programmable delay, MR pin and up to 10-V VIN.

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.

Description

The LP3470 device is a micropower voltage supervisory circuit designed to monitor voltages within 1% of reset threshold over temperature. It provides maximum adjustability for power-on-reset (POR) and supervisory functions.

The LP3470 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. Reset remains asserted for an interval (programmed by an external capacitor) after VCC has risen above the threshold voltage.

For information on available reset threshold voltage options, see Mechanical, Packaging, and Orderable Information.

Features

  • 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 Over
    Temperature
  • Low Quiescent Current (16 µA typical)
  • Reset Valid Down to VCC = 0.5 V