LTC1232CS8#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor and Battery Backup Controller

Characteristics: - Monitors the power supply voltage to ensure proper operation of electronic devices - Controls the switching between the main power supply and a backup battery - Provides protection against power supply glitches, brownouts, and blackouts - Suitable for use in various applications such as microcontrollers, data storage systems, and communication devices

Package: SOIC-8

Essence: The LTC1232CS8#PBF is a voltage supervisor and battery backup controller IC that ensures reliable operation of electronic devices by monitoring the power supply voltage and controlling the switching between the main power supply and a backup battery.

Packaging/Quantity: The LTC1232CS8#PBF is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Quiescent Current: 25µA (typical)
• Power-On Reset Threshold: 1.2V (typical)
• Backup Battery Switchover Threshold: 3.0V (typical)
• Battery Backup Current: 10µA (typical)

Pin Configuration

The LTC1232CS8#PBF has 8 pins arranged as follows:

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| | --| VCC |-- --| GND |-- --| RESET |-- --| MR |-- --| BAT |-- --| OUT |-- --| IN |-- |_______| ```

Pin descriptions: - VCC: Positive power supply input - GND: Ground reference - RESET: Active-low reset output - MR: Manual reset input - BAT: Backup battery input - OUT: Output voltage control - IN: Main power supply input

Functional Features

1. Power Supply Monitoring: The LTC1232CS8#PBF continuously monitors the main power supply voltage to detect any deviations from the specified range. It generates a reset signal when the voltage falls below the power-on reset threshold, ensuring proper device operation.

2. Battery Backup Control: In the event of a power failure or voltage drop, the LTC1232CS8#PBF switches the power source from the main supply to the backup battery. This ensures uninterrupted operation and prevents data loss in critical applications.

3. Manual Reset Capability: The MR pin allows for manual resetting of the device. When pulled low, it triggers a reset signal, regardless of the power supply voltage.

Advantages and Disadvantages

Advantages: - Reliable power supply monitoring and backup control - Low quiescent current consumption - Small form factor package - Wide operating temperature range

Disadvantages: - Limited to applications requiring voltage supervision and battery backup control - Not suitable for high-power applications

Working Principles

The LTC1232CS8#PBF operates by continuously monitoring the power supply voltage using an internal voltage comparator. When the voltage falls below the power-on reset threshold, the reset output is activated, indicating a power failure. The backup battery is then switched on to maintain power supply to the device.

The manual reset input allows for immediate system reset, overriding the power supply monitoring. This feature is useful during system testing or when a controlled restart is required.

Application Field Plans

The LTC1232CS8#PBF finds application in various fields, including: 1. Microcontroller Systems: Ensures reliable operation and protects against power supply glitches in microcontroller-based systems. 2. Data Storage Systems: Provides backup power to prevent data loss during power outages or voltage drops in storage devices. 3. Communication Devices: Ensures uninterrupted operation of communication equipment, such as routers and modems, during power fluctuations.

Alternative Models

1. MAX1232: Voltage supervisor and battery backup controller IC from Maxim Integrated.
2. ADM6315: Microprocessor supervisory circuit with battery backup control from Analog Devices.
3. TPS3808: Precision voltage supervisor and watchdog timer with battery backup control from Texas Instruments.

These alternative models offer similar functionality and can be considered as alternatives to the LTC1232CS8#PBF based on specific application requirements.

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