MIC3809BMM

Product Overview

Category

MIC3809BMM belongs to the category of integrated circuits (ICs).

Use

The MIC3809BMM is commonly used as a voltage supervisor or monitor in various electronic devices and systems.

Characteristics

• Voltage monitoring: The MIC3809BMM can monitor the voltage level of a power supply and provide an output signal based on predefined thresholds.
• Reset function: It includes a reset output that can be used to initiate a system reset when the monitored voltage falls below a certain threshold.
• Adjustable thresholds: The device allows for adjustable voltage thresholds, providing flexibility in different applications.
• Low power consumption: The MIC3809BMM is designed to consume minimal power, making it suitable for battery-powered devices.
• Small package: It comes in a miniature 8-pin MSOP package, which is compact and space-saving.
• RoHS compliant: The device is manufactured according to the Restriction of Hazardous Substances directive, ensuring environmental friendliness.

Package and Quantity

The MIC3809BMM is available in an 8-pin MSOP package. It is typically sold in reels containing a specified quantity of units.

Specifications

• Supply voltage range: 1.6V to 5.5V
• Operating temperature range: -40°C to +85°C
• Threshold voltage options: Various threshold voltage options are available, such as 2.5V, 3.0V, 3.3V, etc.
• Output type: Open-drain
• Quiescent current: Typically 10µA
• Reset timeout period: Typically 140ms

Pin Configuration

The MIC3809BMM has the following pin configuration:

```

---

| | --| VDD GND |-- Pin 1: Ground (GND) --| RESET OUT |-- Pin 2: Reset Output --| THRESHOLD |-- Pin 3: Threshold Voltage Input --| SENSE |-- Pin 4: Voltage Sense Input --| | --| | --| | --| | --|___________| ```

Functional Features

1. Voltage Monitoring: The MIC3809BMM continuously monitors the input voltage and compares it with the threshold voltage set by the user.
2. Reset Output: When the monitored voltage falls below the threshold, the device asserts the reset output, initiating a system reset.
3. Adjustable Thresholds: The threshold voltage can be adjusted using an external resistor divider network, allowing customization for different applications.
4. Hysteresis: The device incorporates hysteresis to prevent false triggering due to voltage fluctuations or noise.
5. Power-On Reset: The MIC3809BMM includes a power-on reset feature that ensures a proper reset when the power supply is initially applied.

Advantages and Disadvantages

Advantages

• Flexible threshold voltage options
• Low power consumption
• Small package size
• RoHS compliant

Disadvantages

• Limited number of pins for additional functionalities
• Lack of built-in overvoltage protection

Working Principles

The MIC3809BMM operates by comparing the input voltage (SENSE pin) with the threshold voltage (THRESHOLD pin). If the input voltage drops below the threshold, the device asserts the reset output (RESET OUT pin), signaling a system reset. The threshold voltage can be adjusted using an external resistor divider network connected to the THRESHOLD pin.

Application Field Plans

The MIC3809BMM finds applications in various electronic systems where voltage monitoring and reset functionality are required. Some potential application fields include:

1. Microcontrollers and Embedded Systems: The device can be used to monitor the power supply voltage of microcontrollers and initiate a reset if the voltage falls below a certain level.
2. Battery-Powered Devices: It can be employed in portable devices, such as smartphones or IoT devices, to monitor battery voltage and trigger a reset when necessary.
3. Industrial Control Systems: The MIC3809BMM can be utilized in industrial control systems to monitor power supply voltages and ensure proper system operation.
4. Automotive Electronics: It finds application in automotive electronics to monitor critical voltages and initiate resets in case of voltage drops.

Alternative Models

1. MAX809: Manufactured by Maxim Integrated, the MAX809 is a similar voltage supervisor IC with adjustable thresholds and a small package size.
2. TPS3839: Produced by Texas Instruments, the TPS3839 offers voltage monitoring and reset functionality with additional features like manual reset input and watchdog timer.
3. ADM708: Manufactured by Analog Devices, the ADM708 is another alternative that provides voltage monitoring and reset functions in a compact package.

These alternative models offer similar functionalities to the MIC3809BMM and can be considered as alternatives based on specific requirements.

In conclusion, the MIC