SNVS003G June   1999  – April 2016 LP3470

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Functional Block Diagram
    2. 7.2 Feature Description
      1. 7.2.1 Reset Time-Out Period
      2. 7.2.2 Reset Output
      3. 7.2.3 Pullup Resistor Selection
      4. 7.2.4 Negative-Going VCC Transients
    3. 7.3 Device Functional Modes
      1. 7.3.1 Reset Output Low
      2. 7.3.2 Reset Output High
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 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

2 Applications

  • Critical µP and µC Power Monitoring
  • Intelligent Instruments
  • Computers
  • Portable and Battery-Powered Equipment

3 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.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LP3470 SOT-23 (5) 1.60 mm × 2.90 mm
  1. For all available packages, see the Package Option Addendum at the end of the data sheet.

Basic Operating Circuit

LP3470 10001601.png