LTC2952IF

Product Overview

Category: Integrated Circuits (ICs)

Use: The LTC2952IF is a power supply monitor and pushbutton controller IC. It is designed to provide reliable power management and control functions in various electronic devices.

Characteristics: - Power supply monitoring - Pushbutton control - Low power consumption - Small form factor - High reliability

Package: The LTC2952IF is available in a compact 16-pin QFN package, which ensures easy integration into electronic circuits.

Essence: The LTC2952IF serves as a crucial component in power management systems, ensuring stable power supply and efficient control of electronic devices.

Packaging/Quantity: The LTC2952IF is typically sold in reels containing 250 units per reel.

Specifications

The LTC2952IF offers the following specifications:

• Operating Voltage Range: 2.7V to 26.5V
• Quiescent Current: 20μA (typical)
• Power-On Reset Threshold: Adjustable from 1.2V to 5V
• Pushbutton Input Voltage Range: 0V to VCC
• Debounce Time: Programmable from 1ms to 10s
• Power Supply Sequencing: Programmable delay between two supplies
• Watchdog Timer: Programmable timeout period

Pin Configuration

The LTC2952IF features a detailed pin configuration as follows:

1. VIN - Power supply input voltage
2. GND - Ground reference
3. VCC - Internal regulator output
4. PGOOD - Power good output
5. WDI - Watchdog input
6. RST - Active-low reset output
7. NMI - Non-maskable interrupt output
8. VBAT - Battery backup input
9. VCCSENSE - VCC sense input
10. VBATSENSE - VBAT sense input
11. DEBOUNCE - Debounce capacitor connection
12. PWRON - Power-on reset threshold setting
13. DELAY - Power supply sequencing delay setting
14. WDTO - Watchdog timeout period setting
15. PB - Pushbutton input
16. GATE - External power switch control output

Functional Features

The LTC2952IF offers the following functional features:

1. Power Supply Monitoring: Monitors the input voltage and generates a power good signal (PGOOD) to indicate the presence of a valid power supply.
2. Pushbutton Control: Detects and debounces pushbutton inputs, generating a reset signal (RST) or non-maskable interrupt (NMI) based on the configuration.
3. Power-On Reset: Provides a controlled reset output (RST) during power-up, ensuring proper initialization of the system.
4. Watchdog Timer: Implements a watchdog timer function to monitor system activity and generate a reset signal if necessary.
5. Power Supply Sequencing: Allows for programmable delay between two power supplies, ensuring proper power-up sequencing in multi-supply systems.

Advantages and Disadvantages

Advantages: - Reliable power supply monitoring and control - Low power consumption - Compact form factor for easy integration - Programmable features for customization - High-quality construction for enhanced reliability

Disadvantages: - Limited availability of alternative models - May require additional external components for specific applications

Working Principles

The LTC2952IF operates by continuously monitoring the input voltage and pushbutton inputs. It utilizes internal circuitry to generate appropriate signals based on the configured settings. The power-on reset feature ensures proper system initialization, while the watchdog timer monitors system activity. The power supply sequencing capability allows for controlled power-up of multiple supplies.

Application Field Plans

The LTC2952IF finds applications in various electronic devices, including but not limited to: - Embedded systems - Industrial control systems - Consumer electronics - Medical devices - Automotive electronics

Alternative Models

While the LTC2952IF is a highly reliable and versatile IC, alternative models with similar functionalities include: 1. LTC2950IF: Similar power supply monitor and pushbutton controller IC with adjustable features. 2. MAX16050: Power supply supervisor IC with integrated watchdog timer and pushbutton control. 3. TPS3890: Ultra-low-power voltage supervisor IC with programmable features.

These alternative models can be considered based on specific application requirements and availability.

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