LTC2934 - Ultra-Low Power Adjustable Supervisor with Power-Fail Output

Features

  • 500nA Quiescent Current
  • ±1.5% (Max) Accuracy over Temperature
  • Operates Down to 1.6V Supply
  • Adjustable Reset Threshold
  • Adjustable Power-Fail Threshold
  • Early Warning Power-Fail Output
  • Selectable 15ms or 200ms Reset Timeout
  • Manual Reset Input
  • Compact 8-Lead, 2mm × 2mm DFN and TSOT-23 (ThinSOT) Packages

Typical Application

LTC2934 Typical Application
LTC2934 Typical Application

Description

The LTC2934 ultra-low power voltage monitor provides system initialization, power-fail warning and reset generation functions. Low quiescent current (500nA typical) makes the LTC2934 an ideal choice for battery-operated applications.

Precision power-fail and reset voltages can be configured independently. Early warning of an impending low volt- age condition is provided at the power-fail output (PFO) when the PFI input falls below 0.4V. Supervisory circuits monitor the ADJ input and pull RST low when ADJ falls below 0.4V. When ADJ is rising from an under-threshold condition, an internal reset timer is started after exceeding the ADJ threshold by 5%. The reset timeout delays the return of the RST output to a high state. A pushbutton switch connected to the MR input is typically used to force a manual reset. Outputs RST and PFO are available with open-drain (LTC2934-1) or active pull-up circuits (LTC2934-2). Operating temperature range is from –40ºC to 85ºC.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

DFN-8, SOT-23

LTC2934 Package Drawing
LTC2934 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC2934CDC-1#PBF DFN 8 C $1.69 View
LTC2934CDC-1#TRMPBF DFN 8 C $1.69 $1.20 View
LTC2934CDC-1#TRPBF DFN 8 C $1.15 View
LTC2934CDC-2#PBF DFN 8 C $1.69 View
LTC2934CDC-2#TRMPBF DFN 8 C $1.69 $1.20 View
LTC2934CDC-2#TRPBF DFN 8 C $1.15 View
LTC2934CTS8-1#PBF SOT 8 C $1.69 View
LTC2934CTS8-1#TRMPBF SOT 8 C $1.69 $1.20 View
LTC2934CTS8-1#TRPBF SOT 8 C $1.15 View
LTC2934CTS8-2#PBF SOT 8 C $1.69 View
LTC2934CTS8-2#TRMPBF SOT 8 C $1.69 $1.20 View
LTC2934CTS8-2#TRPBF SOT 8 C $1.15 View
LTC2934IDC-1#PBF DFN 8 I $1.94 View
LTC2934IDC-1#TRMPBF DFN 8 I $1.94 $1.37 View
LTC2934IDC-1#TRPBF DFN 8 I $1.32 View
LTC2934IDC-2#PBF DFN 8 I $1.94 View
LTC2934IDC-2#TRMPBF DFN 8 I $1.94 $1.37 View
LTC2934IDC-2#TRPBF DFN 8 I $1.32 View
LTC2934ITS8-1#PBF SOT 8 I $1.94 View
LTC2934ITS8-1#TRMPBF SOT 8 I $1.94 $1.37 View
LTC2934ITS8-1#TRPBF SOT 8 I $1.32 View
LTC2934ITS8-2#PBF SOT 8 I $1.94 View
LTC2934ITS8-2#TRMPBF SOT 8 I $1.94 $1.37 View
LTC2934ITS8-2#TRPBF SOT 8 I $1.32 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Portable Equipment
  • Battery-Powered Equipment
  • Security Systems
  • Point-of-Sale Devices
  • Wireless Systems

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Design Tools

LTspiceIV

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

Models for the following parts are available in LTspice IV:
LTC2934-1
LTC2934-2

Technical Support