LTC2974IUP#PBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power System Management
• Characteristics: High-performance, multi-channel power supply monitor and sequencer
• Package: 38-Lead Plastic QFN (5mm x 7mm)
• Essence: Monitors and controls multiple power supplies in a system
• Packaging/Quantity: Tape & Reel, 250 units per reel

Specifications

• Input Voltage Range: -0.3V to 6V
• Operating Temperature Range: -40°C to 125°C
• Number of Channels: 4
• Voltage Monitoring Accuracy: ±0.5%
• Sequencing Time Delay: Programmable from 1ms to 10s
• Communication Interface: I2C/SMBus

Detailed Pin Configuration

The LTC2974IUP#PBF has a total of 38 pins. Here is a detailed pin configuration:

1. VCC: Power Supply Input
2. GND: Ground
3. SDA: I2C Data Line
4. SCL: I2C Clock Line
5. ALERT#: Interrupt Output
6. FAULT#: Fault Indicator Output
7. VIN1 to VIN4: Power Supply Inputs
8. VOUT1 to VOUT4: Power Supply Outputs
9. REFMON1 to REFMON4: Reference Voltage Monitor Inputs
10. PGOOD1 to PGOOD4: Power Good Outputs
11. FLT1 to FLT4: Fault Indicator Outputs
12. SEQ1 to SEQ4: Sequencing Control Inputs
13. MUXOUT: Multiplexer Output
14. MUXIN: Multiplexer Input
15. VEE: Negative Power Supply Input
16. VCC: Power Supply Input

Functional Features

• Monitors and sequences up to 4 power supplies
• Programmable sequencing time delay for each channel
• Accurate voltage monitoring with ±0.5% accuracy
• Fault detection and indication through FLT pins
• Power good indication through PGOOD pins
• I2C/SMBus interface for communication and control
• Multiplexer for selecting different power supply inputs

Advantages

• High-performance power supply monitoring and sequencing
• Flexible sequencing time delay settings
• Accurate voltage monitoring for reliable operation
• Compact package size for space-constrained applications
• Easy integration into existing systems with I2C/SMBus interface

Disadvantages

• Limited to 4 power supply channels
• Requires external components for complete power system management

Working Principles

The LTC2974IUP#PBF is designed to monitor and control multiple power supplies in a system. It uses an I2C/SMBus interface to communicate with the host controller and provides accurate voltage monitoring, fault detection, and power sequencing capabilities. The device continuously monitors the input voltages and compares them to programmable thresholds. If any voltage falls outside the specified range, a fault condition is detected and indicated through the FLT pins. The power good status of each channel is also provided through the PGOOD pins. The sequencing time delay can be programmed individually for each channel, allowing precise control over the power-up and power-down sequence.

Detailed Application Field Plans

The LTC2974IUP#PBF is widely used in various applications where multiple power supplies need to be monitored and sequenced. Some of the common application fields include:

1. Data Centers: Managing power supplies for servers, storage systems, and networking equipment.
2. Telecommunications: Controlling power distribution in telecom infrastructure such as base stations and switches.
3. Industrial Automation: Monitoring and sequencing power supplies in industrial control systems and PLCs.
4. Medical Equipment: Ensuring reliable power management in medical devices and diagnostic equipment.
5. Automotive Electronics: Power system management for automotive applications, including infotainment systems and advanced driver-assistance systems (ADAS).

Detailed and Complete Alternative Models

1. LTC2974IUP#TRPBF: Same features and specifications as LTC2974IUP#PBF, but available in tape & reel packaging with 1500 units per reel.
2. LTC2974IUFD#PBF: Similar functionality to LTC2974IUP#PBF, but with additional fault detection and protection features.
3. LTC2974IUFD#TRPBF: Same as LTC2974IUFD#PBF, but available in tape & reel packaging with 1000 units per reel.

These alternative models provide similar capabilities and can be considered based on specific requirements and availability.

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