LTC2964HUDC#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Voltage Monitor with Adjustable Reset Timer
• Package: 16-Lead QFN (Quad Flat No-Lead)
• Essence: Monitors voltage levels and provides a reset signal when necessary
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.7V to 80V
• Adjustable Reset Timeout Period: 1ms to 10s
• Quiescent Current: 20µA
• Operating Temperature Range: -40°C to 125°C
• Output Type: Active-Low Open-Drain
• Fault Threshold Accuracy: ±1.5%
• Power-On Reset Delay: 200ms
• Watchdog Timer: 1.6s

Detailed Pin Configuration

The LTC2964HUDC#TRPBF has the following pin configuration:

1. VCC: Supply Voltage Input
2. GND: Ground
3. WDI: Watchdog Timer Input
4. RESET: Active-Low Open-Drain Reset Output
5. FLT: Fault Indicator Output
6. TH: Threshold Input
7. MR: Manual Reset Input
8. CT: Capacitor Connection for Reset Timeout Adjustment
9. NC: No Connect
10. NC: No Connect
11. NC: No Connect
12. NC: No Connect
13. NC: No Connect
14. NC: No Connect
15. NC: No Connect
16. NC: No Connect

Functional Features

• Monitors input voltage and generates a reset signal if the voltage falls below a certain threshold.
• Provides an adjustable reset timeout period to prevent false resets during power-up or voltage transients.
• Includes a watchdog timer input for system monitoring.
• Features a fault indicator output to signal abnormal conditions.
• Offers a manual reset input for external reset control.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows for versatile applications. - Adjustable reset timeout period provides flexibility in different scenarios. - Low quiescent current minimizes power consumption. - Active-low open-drain reset output simplifies interfacing with other devices. - Accurate fault threshold ensures reliable voltage monitoring.

Disadvantages: - Limited number of available pins may restrict the integration of additional features. - Not suitable for applications requiring precise timing beyond the provided reset timeout range.

Working Principles

The LTC2964HUDC#TRPBF operates by continuously monitoring the input voltage through the TH pin. If the voltage falls below the set threshold, the device generates an active-low reset signal on the RESET pin. The reset timeout period can be adjusted using an external capacitor connected to the CT pin. During power-up or voltage transients, the adjustable timeout prevents false resets. The watchdog timer input (WDI) allows for system monitoring, and the fault indicator output (FLT) signals any abnormal conditions. The manual reset input (MR) enables external control over the reset function.

Detailed Application Field Plans

The LTC2964HUDC#TRPBF is commonly used in various applications, including:

1. Power Supply Monitoring: Ensuring stable operation of power supplies by monitoring voltage levels and providing timely resets if necessary.
2. Industrial Control Systems: Protecting sensitive equipment from voltage fluctuations and providing fault indication for maintenance purposes.
3. Automotive Electronics: Monitoring battery voltage and triggering resets to prevent damage to critical components during low voltage conditions.
4. Telecommunications: Safeguarding communication systems by monitoring power supply integrity and initiating resets when required.
5. Medical Devices: Ensuring reliable operation of medical equipment by monitoring power sources and generating resets in case of voltage anomalies.

Detailed and Complete Alternative Models

1. LTC2960: Similar functionality with a lower supply voltage range (2.5V to 36V).
2. LTC2966: Offers additional features such as adjustable power-on reset delay and watchdog timer disable function.
3. LTC2967: Provides a wider operating temperature range (-40°C to 150°C) for extreme environments.
4. LTC2968: Includes a precision reference output for accurate voltage monitoring applications.

These alternative models offer similar voltage monitoring and reset capabilities, but with variations in specific features and specifications.

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