LTC2921CGN-2.5#PBF

Product Overview

Category

LTC2921CGN-2.5#PBF belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

• Voltage monitoring: LTC2921CGN-2.5#PBF provides accurate monitoring of input voltages.
• Power supply sequencing: It ensures proper power-up and power-down sequencing of multiple voltage rails.
• Package: The LTC2921CGN-2.5#PBF comes in a 16-pin SSOP package.
• Essence: This IC is designed to enhance system reliability by controlling voltage levels during power transitions.
• Packaging/Quantity: The LTC2921CGN-2.5#PBF is typically sold in reels, with each reel containing a specific quantity of ICs.

Specifications

The specifications of LTC2921CGN-2.5#PBF include:

• Input voltage range: 2.7V to 5.5V
• Output voltage: 2.5V
• Operating temperature range: -40°C to +85°C
• Quiescent current: 30µA (typical)
• Power supply sequencing time: Programmable delay up to 10 seconds
• Fault detection threshold: Adjustable through external resistors

Detailed Pin Configuration

The LTC2921CGN-2.5#PBF has a total of 16 pins. The pin configuration is as follows:

1. VCC: Power supply input
2. GND: Ground reference
3. FLT: Fault output indicator
4. EN: Enable input
5. SEQ: Sequencing control input
6. DELAY: Delay programming input
7. V1, V2, V3, V4: Voltage monitoring inputs
8. G1, G2, G3, G4: Ground reference for voltage monitoring inputs
9. VOUT: Output voltage
10. GND: Ground reference
11. FLT: Fault output indicator
12. EN: Enable input
13. SEQ: Sequencing control input
14. DELAY: Delay programming input
15. V5: Voltage monitoring input
16. G5: Ground reference for voltage monitoring input

Functional Features

The LTC2921CGN-2.5#PBF offers the following functional features:

• Accurate voltage monitoring: It ensures that the input voltages are within the desired range.
• Power supply sequencing: The IC controls the power-up and power-down sequence of multiple voltage rails, preventing potential damage to sensitive components.
• Programmable delay: The delay between power supply sequencing can be adjusted according to specific requirements.
• Fault detection: The IC provides a fault output indicator to signal any abnormal voltage conditions.

Advantages and Disadvantages

Advantages

• Enhanced system reliability through precise voltage monitoring and power sequencing.
• Programmable delay allows customization based on specific application needs.
• Compact 16-pin SSOP package enables space-efficient integration into electronic devices.

Disadvantages

• Limited to voltage monitoring and power sequencing applications.
• Requires external resistors for adjusting fault detection threshold.

Working Principles

The LTC2921CGN-2.5#PBF operates by continuously monitoring the input voltages and comparing them to a predefined threshold. It controls the enable signals of various voltage rails to ensure proper sequencing during power-up and power-down. The programmable delay feature allows for fine-tuning the timing between different voltage rails. In case of any voltage abnormalities, the fault output indicator is activated.

Detailed Application Field Plans

The LTC2921CGN-2.5#PBF finds applications in various electronic devices, including:

1. Server systems: Ensures proper power sequencing of multiple voltage rails to prevent damage during system startup and shutdown.
2. Industrial automation: Provides reliable voltage monitoring for critical components, enhancing system stability.
3. Telecommunications equipment: Controls power supply sequencing to avoid potential issues during operation.
4. Automotive electronics: Monitors voltage levels during power transitions to protect sensitive automotive components.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to LTC2921CGN-2.5#PBF are:

1. MAX16050: Integrated circuit for voltage monitoring and power sequencing applications.
2. TPS3890: Voltage supervisor with adjustable delay and fault detection features.
3. ADM1176: Power supply sequencer and voltage monitor with programmable delay capabilities.

These alternative models provide comparable features and can be considered as substitutes for LTC2921CGN-2.5#PBF in specific applications.

Word count: 550 words