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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...

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SeekIC No. : 004402148 Detail

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 Operati...

LTC2909 Data Sheet

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Part Number:
LTC2909
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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: VCC = 0.5V Guaranteed
`Space Saving 8-Lead TSOT-23 and 3mm * 2mm DFN Packages


Application

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


Pinout

Connection Diagram


Specifications

Terminal Voltages
VCC (Note 3) ........................................... 0.3V to 6V
SEL, RST .............................................. 0.3V to 7.5V
ADJ1, ADJ2 .......................................... 0.3V to 7.5V
TMR .........................................0.3V to (VCC + 0.3V)
Terminal Currents
IVCC (Note 3) ................................................±10mA
IREF .................................................................±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


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 VCC (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.




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