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LTC2908ITS8-B1TRPBF, LTC2909, LTC2909CDDB-3.3PBF

Table of contents:
Info of LTC2908ITS8-B1TRPBF
Info of LTC2909
Info of LTC2909CDDB-3.3PBF

LTC2908ITS8-B1TRPBF, LTC2909, LTC2909CDDB-3.3PBF Selling Leads, Datasheet

MFG:LT Package Cooled:SOT23-8 D/C:09+

LTC2908ITS8-B1TRPBF, LTC2909, LTC2909CDDB-3.3PBF Picture

LTC2908ITS8-B1TRPBF, LTC2909, LTC2909CDDB-3.3PBF Datasheet download

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Part Number: LTC2908ITS8-B1TRPBF

MFG: LT

Package Cooled: SOT23-8

D/C: 09+

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LTC2909 General Description

The LTC®2909 is a dual input monitor intended for a variety of system monitoring applications. Polarity selection and a buffered reference output allow the LTC2909 to monitor positive and negative supplies for undervoltage (UV) and overvoltage (OV) conditions.

The two inputs have a nominal 0.5V threshold, featuring tight 1.5% threshold accuracy over the entire operating temperature range. Glitch fi ltering ensures reliable reset operation without false triggering. A third fi xed-threshold UVLO monitor on the part's V_CC (also 1.5% accuracy) is available for standard logic supplies.

The common reset output has a timeout that may use a preset 200ms, be set by an external capacitor or be disabled. A three-state input pin sets the input polarity of each adjustable input without requiring any external components.

The LTC2909 provides a highly versatile, precise, spaceconscious, micropower solution for supply monitoring.

LTC2909 Maximum Ratings

Terminal Voltages
V_CC (Note 3) ........................................... 0.3V to 6V
SEL, RST .............................................. 0.3V to 7.5V
ADJ1, ADJ2 .......................................... 0.3V to 7.5V
TMR .........................................0.3V to (V_CC + 0.3V)
Terminal Currents
I_VCC (Note 3) ................................................±10mA
I_REF .................................................................±1mA
Operating Temperature Range
LTC2909C ........................................... 0°C to 70°C
LTC2909I ....................................... 40°C to 85°C
Storage Temperature Range
DFN .............................................. 65°C to 125°C
TSOT-23 ....................................... 65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSOT-23 ........................................................ 300°C

LTC2909 Features

`Two Low Voltage Adjustable Inputs (0.5V)
`Pin Selectable Input Polarity Allows Negative and OV Monitoring
`Guaranteed Threshold Accuracy: ±1.5%
`6.5V Shunt Regulator for High Voltage Operation
`Low 50A Quiescent Current
`Buffered 1V Reference for Negative Supply Offset
`Input Glitch Rejection
`Adjustable Reset Timeout Period
`Selectable Internal Timeout Saves Components
`Open-Drain RST Output
`Accurate UVLO for 2.5V, 3.3V, 5V Systems
`Ultralow Voltage Reset: V_CC = 0.5V Guaranteed
`Space Saving 8-Lead TSOT-23 and 3mm * 2mm DFN Packages

LTC2909 Typical Application

·Desktop and Notebook Computers
·Handheld Devices
·Network Servers
·Core, I/O Monitor
·Automotive

LTC2909 Connection Diagram

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