Datasheet
LP3470
www.ti.com
SNVS003F –JUNE 1999–REVISED MARCH 2013
LP3470 Tiny Power On Reset Circuit
Check for Samples: LP3470
1
FEATURES
DESCRIPTION
The LP3470 is a micropower CMOS voltage
2
• Tiny SOT-23-5 Package
supervisory circuit designed to monitor power
• Open Drain Reset Output
supplies in microprocessor (µP) and other digital
• Programmable Reset Timeout Period Using an
systems. It provides maximum adjustability for power-
External Capacitor
on-reset (POR) and supervisory functions. It is
available in the following six standard reset threshold
• Immune to Short V
CC
Transients
voltage (V
RTH
) options: 2.63V, 2.93V, 3.08V, 3.65V,
4.00V, 4.38V, and 4.63V. If other voltage options
APPLICATIONS
between 2.4V and 5.0V are desired please contact
• Critical µP and µC Power Monitoring
your TI representative.
• Intelligent Instruments
The LP3470 asserts a reset signal whenever the V
CC
• Computers supply voltage falls below a reset threshold. The
reset time-out period is adjustable using an external
• Portable/Battery-Powered Equipments
capacitor. Reset remains asserted for an interval
(programmed by an external capacitor) after V
CC
has
KEY SPECIFICATIONS
risen above the threshold voltage.
• ±1% Reset Threshold Accuracy Over
The device is available in the tiny SOT-23-5 package.
Temperature
• Standard Reset Threshold Voltages: 2.63V,
2.93V, 3.08V, 3.65V, 4.00V, 4.38V, and 4.63V
• Custom Reset Threshold Voltages: For Other
Voltages Between 2.4V and 5.0V Contact Your
TI Representative
• Very Low Quiescent Current (16 µA typical)
• Reset Valid Down to V
CC
=0.5V
Pin Configuration and Basic Operating Circuit
Figure 1. Pin Configuration Top View Figure 2. Basic Operating Circuit
See Package Number DBV0005A
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.