LP3470 Datasheet, PDF (1/22 Pages) National Semiconductor (TI) – Tiny Power On Reset Circuit

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LP3470
SNVS003G – JUNE 1999 – REVISED APRIL 2016
LP3470 Voltage Supervisor With Programmable Delay and 1% Reset Threshold
1 Features
•1 5-Pin SOT-23 Package
• Open-Drain Reset Output
• Programmable Reset Time-Out Period Using an
External Capacitor
• Immune to Short V_CC Transients
• ±1% Reset Threshold Accuracy Over
Temperature
• Low Quiescent Current (16 µA typical)
• Reset Valid Down to V_CC = 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 V_CC
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 V_CC 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
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.