LP3470M5X-3.08

Overview

Product Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Low-power consumption - Wide operating voltage range - Adjustable reset threshold - Power-on reset delay time of 200ms - Small package size - RoHS compliant

Package: SOT-23-5

Essence: The LP3470M5X-3.08 is a voltage supervisor IC designed to monitor the power supply voltage of electronic systems and provide a reset signal during power-up, power-down, and brownout conditions.

Packaging/Quantity: The LP3470M5X-3.08 is available in tape and reel packaging with a quantity of 3000 units per reel.

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Reset Threshold Voltage: Adjustable from 1.2V to 4.6V
• Reset Timeout Period: 200ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 1.5µA (typical)
• Output Type: Active-Low Open-Drain

Pin Configuration

The LP3470M5X-3.08 features a standard SOT-23-5 package with the following pin configuration:

____ VDD| |GND NC | |RESET NC | | GND|____|NC

Functional Features

1. Voltage Monitoring: The LP3470M5X-3.08 continuously monitors the input voltage and asserts a reset signal when the voltage falls below the user-adjustable threshold.
2. Power-On Reset Delay: The IC provides a fixed delay of 200ms after power-up before releasing the reset signal, allowing sufficient time for the system to stabilize.
3. Brownout Detection: In case of a brownout condition where the supply voltage drops below the threshold, the LP3470M5X-3.08 asserts the reset signal to prevent erratic behavior or data corruption.
4. Low Power Consumption: With a quiescent current of only 1.5µA, the IC minimizes power consumption and is suitable for battery-powered applications.
5. Wide Operating Voltage Range: The LP3470M5X-3.08 can operate within a wide voltage range from 1.8V to 5.5V, making it compatible with various electronic systems.

Advantages and Disadvantages

Advantages: - Low-power consumption extends battery life in portable devices. - Adjustable reset threshold allows customization for different voltage requirements. - Small package size enables space-saving designs. - Wide operating voltage range provides versatility in system integration.

Disadvantages: - Fixed reset timeout period may not be suitable for all applications requiring longer or shorter delays. - Limited pin configuration options due to the SOT-23-5 package.

Working Principles

The LP3470M5X-3.08 operates by comparing the input voltage with the user-adjustable threshold voltage. When the input voltage falls below the threshold, the internal circuitry asserts the active-low reset signal. This signal remains asserted until the input voltage rises above the threshold and the fixed 200ms delay period elapses after power-up. The IC continuously monitors the voltage, ensuring stable operation and preventing potential issues caused by insufficient power supply.

Detailed Application Field Plans

The LP3470M5X-3.08 finds application in various electronic systems that require reliable voltage monitoring and power-on reset functionality. Some potential application fields include:

1. Microcontrollers and Microprocessors: The IC ensures proper initialization and prevents erratic behavior during power-up or brownout conditions, enhancing the overall system reliability.
2. Embedded Systems: By providing a reset signal, the LP3470M5X-3.08 helps maintain the integrity of data and prevents corruption in embedded systems.
3. Battery-Powered Devices: The low-power consumption and wide operating voltage range make the IC suitable for portable devices, extending battery life and ensuring stable operation even with varying supply voltages.

Detailed and Complete Alternative Models

1. MAX809: This voltage supervisor IC offers similar features and functionality to the LP3470M5X-3.08, including adjustable reset threshold, power-on reset delay, and low-power consumption. It is available in various package options.
2. TL7705: The TL7705 is another voltage supervisor IC with comparable characteristics, such as adjustable reset threshold, fixed reset timeout period, and low quiescent current. It comes in different package sizes to accommodate diverse design requirements.

(Note: The alternative models mentioned above are just examples and not an exhaustive list.)

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