LTC2952CF

Product Overview

• Category: Integrated Circuit
• Use: Power Supply Monitor and Reset Controller
• Characteristics: Low Power, Wide Input Voltage Range, Adjustable Reset Timeout, Manual Reset Input, Power-On Reset Output
• Package: 16-Lead Plastic TSSOP
• Essence: The LTC2952CF is a versatile power supply monitor and reset controller designed for use in various electronic systems.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Input Voltage Range: 1.6V to 36V
• Reset Threshold Accuracy: ±1.5%
• Adjustable Reset Timeout Range: 1ms to 10s
• Quiescent Current: 12µA (typical)
• Manual Reset Input Threshold: 0.4V (typical)
• Power-On Reset Output: Active-Low, Open-Drain

Pin Configuration

The LTC2952CF features a 16-lead plastic TSSOP package with the following pin configuration:

1. VCC - Power Supply Input
2. GND - Ground
3. MR - Manual Reset Input
4. RT - Reset Timeout Adjustment
5. ROSC - Reset Timeout Oscillator
6. RST - Power-On Reset Output
7. GND - Ground
8. GND - Ground
9. GND - Ground
10. GND - Ground
11. GND - Ground
12. GND - Ground
13. GND - Ground
14. GND - Ground
15. GND - Ground
16. VCC - Power Supply Input

Functional Features

• Monitors the input voltage and asserts a reset signal when it falls below a specified threshold.
• Provides an adjustable reset timeout period to ensure proper system reset.
• Includes a manual reset input for external reset control.
• Generates a power-on reset output signal to indicate when the power supply has stabilized.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications. - Adjustable reset timeout provides flexibility in system design. - Low quiescent current minimizes power consumption. - Manual reset input offers external control over the reset function. - Power-on reset output ensures reliable system initialization.

Disadvantages: - Limited pin configuration options due to package size. - Requires additional external components for proper operation.

Working Principles

The LTC2952CF continuously monitors the input voltage and compares it to a preset threshold. When the input voltage falls below this threshold, the device asserts a reset signal to initiate a system reset. The reset timeout period can be adjusted using an external resistor and capacitor, allowing designers to fine-tune the reset duration. Additionally, the device includes a manual reset input that can be used to force a reset externally. Once the input voltage rises above the threshold and stabilizes, the LTC2952CF generates a power-on reset output signal to indicate that the system is ready for operation.

Application Field Plans

The LTC2952CF finds applications in various electronic systems where power supply monitoring and reset control are critical. Some potential application fields include:

1. Embedded Systems: Ensuring proper system initialization and preventing erratic behavior during power-up.
2. Industrial Control Systems: Monitoring power supply integrity and providing reliable reset functionality.
3. Automotive Electronics: Protecting sensitive components from voltage fluctuations and ensuring safe system operation.
4. Medical Devices: Guaranteeing reliable power supply and enabling controlled system resets when necessary.
5. Consumer Electronics: Enhancing system reliability by monitoring power supply conditions and facilitating proper resets.

Alternative Models

For users seeking alternative options, the following models provide similar functionality to the LTC2952CF:

1. LTC2950: Power Supply Monitor and Reset Controller with Adjustable Reset Timeout.
2. MAX823: Low-Power Microprocessor Reset Circuits with Manual Reset Input.
3. TPS3890: Precision Voltage Supervisor and Watchdog Timer with Programmable Reset Timeout.

These alternative models offer comparable features and can be considered based on specific application requirements.

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