LTC2908

PRODUCTION

Precision Six Input Supply Monitor

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Overview

  • Ultralow Voltage Reset: VCC = 0.5V Guaranteed*
  • Monitors Six Inputs Simultaneously:
    • 5V, 3.3V, 2.5V, 1.8V, ADJ1, ADJ2 (LTC2908-A1)
    • 3.3V, 2.5V, 1.8V, 1.5V, ADJ1, ADJ2 (LTC2908-B1)
    • 2.5V, ADJ1, ADJ2, ADJ3, ADJ4, ADJ5 (LTC2908-C1)
  • Guaranteed Threshold Accuracy: ±1.5% of Monitored Voltage Overtemperature
  • Internal VCC Auto Select
  • Power Supply Glitch Immunity
  • 200ms Reset Time Delay
  • Active Low Open-Drain RST Output
  • Low Profile (1mm) 8-Lead SOT-23 (ThinSOT) and Plastic (3mm × 2mm) DFN Packages

The LTC2908 is a six input supply monitor for systems requiring a precise and compact monitoring solution for multiple supply voltages. The inputs can be shorted together for monitoring systems with fewer than six supply voltages, and the open drain RST output of two or more LTC2908s can be wired-OR together for monitoring systems with more than six supply voltages. The common reset output remains low until all six inputs have been in compliance for 200ms.

The LTC2908 features a tight 1.5% threshold accuracy over the entire operating temperature range and glitch immunity to ensure reliable reset operation without false triggering. The open-drain RST output state is guaranteed to be in the correct state as long as V1 and/or V2 is 0.5V or greater.

The LTC2908 also features adjustable inputs with a nominal threshold level at 0.5V. This product provides a precise, space-conscious, micropower and general purpose solution for any kind of system requiring supply monitors.

Applications

  • Network Servers
  • Wireless Base Stations
  • Optical Networking Systems
  • Multivoltage Systems
  • Desktop and Notebook Computers

LTC2908
Precision Six Input Supply Monitor
Six Supply Monitor with 5% Tolerance  (12V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V) RST Output Voltage vs V1  with 10k Pull-Up Resistor to V1 Product Package 1 Product Package 2 Product Package 3 Product Package 4
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Documentation

Data Sheet 1

Reliability Data 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Analog to Digital Converters (ADCs) 1
LTC2991 RECOMMENDED FOR NEW DESIGNS Octal I2C Voltage, Current, and Temperature Monitor
Power System Management (PSM) & Sequencers 1
LTC2974 RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
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Tools & Simulations

LTspice


Models for the following parts are available in LTspice:

  • LTC2908-A1
  • LTC2908-B1
  • LTC2908-C1
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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