LTC2977BIUP

Product Overview

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

Specifications

• Input Voltage Range: 2.9V to 17V
• Number of Channels: 8
• Output Voltage Range: 0V to 6V
• Operating Temperature Range: -40°C to 125°C
• Quiescent Current: 50µA per Channel
• Fault Detection Threshold Accuracy: ±1%
• Sequencing Time Delay: Programmable from 1ms to 10s

Detailed Pin Configuration

The LTC2977BIUP features the following pin configuration:

1. VIN1: Input voltage for channel 1
2. VIN2: Input voltage for channel 2
3. VIN3: Input voltage for channel 3
4. VIN4: Input voltage for channel 4
5. VIN5: Input voltage for channel 5
6. VIN6: Input voltage for channel 6
7. VIN7: Input voltage for channel 7
8. VIN8: Input voltage for channel 8
9. GND: Ground
10. VCC: Supply voltage input
11. SDA: I2C data input/output
12. SCL: I2C clock input
13. ALERT: Alert output
14. FAULT: Fault output
15. FLT/SD: Fault/Shutdown input
16. REF: Reference voltage output
17. VOUT1: Output voltage for channel 1
18. VOUT2: Output voltage for channel 2
19. VOUT3: Output voltage for channel 3
20. VOUT4: Output voltage for channel 4
21. VOUT5: Output voltage for channel 5
22. VOUT6: Output voltage for channel 6
23. VOUT7: Output voltage for channel 7
24. VOUT8: Output voltage for channel 8
25. GND: Ground
26. GND: Ground
27. GND: Ground
28. GND: Ground
29. GND: Ground
30. GND: Ground
31. GND: Ground
32. GND: Ground
33. GND: Ground
34. GND: Ground
35. GND: Ground
36. GND: Ground
37. GND: Ground
38. GND: Ground

Functional Features

• Monitors and sequences up to 8 power supplies simultaneously
• Programmable sequencing time delay for each channel
• Accurate fault detection with ±1% threshold accuracy
• I2C interface for easy configuration and monitoring
• Alert and fault outputs for system status indication
• Low quiescent current consumption per channel

Advantages and Disadvantages

Advantages: - High-performance power supply monitoring and sequencing - Precise fault detection with low threshold accuracy - Easy configuration and monitoring through I2C interface - Compact package size for space-constrained applications

Disadvantages: - Limited number of channels (up to 8) - Requires external components for proper operation

Working Principles

The LTC2977BIUP is designed to monitor and sequence multiple power supplies in a system. It utilizes an I2C interface for configuration and monitoring purposes. The device continuously monitors the input voltages and compares them to programmable thresholds. If a fault condition is detected, the device generates an alert or fault output signal. The sequencing time delay can be programmed to ensure proper power-up and power-down sequences for each channel.

Detailed Application Field Plans

The LTC2977BIUP is commonly used in various applications, including: - Data centers - Telecommunications equipment - Industrial control systems - Medical devices - Automotive electronics

In data centers, it ensures reliable power supply monitoring and sequencing for servers and networking equipment. In telecommunications equipment, it helps maintain stable power delivery to critical components. In industrial control systems, it enables precise power management for automation and control devices. In medical devices, it ensures safe and accurate power supply for patient monitoring and treatment equipment. In automotive electronics, it provides robust power management for various vehicle systems.

Detailed and Complete Alternative Models

1. LTC2978BIUP: Similar to LTC2977BIUP but with additional features such as current monitoring and margining capabilities.
2. LTC2979BIUP: Enhanced version of LTC2977BIUP with extended input voltage range and higher fault detection accuracy.
3. LTC2980BIUP: Advanced power system manager with