LTC2909ITS8-2.5#TRPBF

Product Overview

Category

LTC2909ITS8-2.5#TRPBF belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in electronic devices for voltage monitoring and power supply sequencing.

Characteristics

• Voltage monitoring: The LTC2909ITS8-2.5#TRPBF provides accurate voltage monitoring capabilities, ensuring stable operation of electronic systems.
• Power supply sequencing: It enables proper sequencing of multiple power supplies, preventing potential damage to sensitive components.
• Package: This IC comes in an 8-pin small outline integrated circuit (SOIC) package.
• Essence: The LTC2909ITS8-2.5#TRPBF is designed to enhance system reliability by monitoring voltages and controlling power supply sequencing.
• Packaging/Quantity: It is typically available in reels or tubes, with a quantity of 2500 units per reel.

Specifications

The LTC2909ITS8-2.5#TRPBF has the following specifications:

• Supply Voltage Range: 2.7V to 6V
• Voltage Monitoring Threshold: 2.5V
• Operating Temperature Range: -40°C to 85°C
• Quiescent Current: 20µA (typical)
• Output Type: Active Low/Open Drain
• Fault Detection Timeout: Adjustable from 1ms to 10s

Detailed Pin Configuration

The LTC2909ITS8-2.5#TRPBF features the following pin configuration:

1. GND: Ground connection
2. VIN: Input voltage to be monitored
3. VCC: Supply voltage for the IC
4. FLT: Fault output indicating voltage violation
5. /FLT: Complementary fault output
6. /EN: Enable pin for power sequencing control
7. /EN: Complementary enable pin
8. GND: Ground connection

Functional Features

The LTC2909ITS8-2.5#TRPBF offers the following functional features:

1. Voltage Monitoring: It continuously monitors the input voltage (VIN) and compares it with the preset threshold (2.5V). If the voltage falls below the threshold, the fault output (/FLT) is activated.
2. Power Supply Sequencing: The IC provides power sequencing control through the enable pins (/EN). It ensures that multiple power supplies are turned on/off in a specific order, preventing potential damage to sensitive components.
3. Fault Detection Timeout: The fault detection timeout can be adjusted using external capacitors, allowing flexibility in defining the duration of voltage violations before triggering the fault output.

Advantages and Disadvantages

Advantages

• Accurate voltage monitoring for enhanced system reliability
• Power supply sequencing capability for proper startup/shutdown of electronic devices
• Adjustable fault detection timeout for customization
• Small package size for space-constrained applications

Disadvantages

• Limited voltage monitoring threshold range (specifically set at 2.5V)
• Requires additional external capacitors for adjusting fault detection timeout

Working Principles

The LTC2909ITS8-2.5#TRPBF operates based on a voltage comparator circuit. It continuously compares the input voltage (VIN) with the preset threshold (2.5V). If the voltage drops below the threshold, indicating a fault condition, the fault output (/FLT) is activated. Additionally, the IC controls power supply sequencing through the enable pins (/EN), ensuring proper startup and shutdown of multiple power supplies.

Detailed Application Field Plans

The LTC2909ITS8-2.5#TRPBF finds application in various fields, including but not limited to:

1. Industrial Automation: Used in control systems to monitor and sequence power supplies for reliable operation of machinery.
2. Telecommunications: Ensures proper voltage monitoring and sequencing in communication equipment, preventing damage to sensitive components.
3. Automotive Electronics: Monitors and controls power supply sequencing in automotive systems, enhancing reliability and safety.
4. Medical Devices: Provides voltage monitoring and sequencing capabilities in medical equipment, ensuring stable operation and patient safety.

Detailed and Complete Alternative Models

1. LTC2909ITS8-3.3#TRPBF: Similar to LTC2909ITS8-2.5#TRPBF, but with a voltage monitoring threshold of 3.3V.
2. LTC2909ITS8-1.8#TRPBF: Another variant with a voltage monitoring threshold of 1.8V.
3. LTC2909ITS8-ADJ#TRPBF: Adjustable voltage monitoring threshold version, allowing customization within a specified range.

These alternative models provide flexibility in voltage monitoring thresholds, catering to different application requirements.

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