MIC4680-1.8BM

Product Overview

Category

The MIC4680-1.8BM belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage: 1.8V
• Maximum Output Current: 500mA
• Low Dropout Voltage: 200mV at 500mA
• Low Quiescent Current: 60µA
• High PSRR: 70dB at 1kHz
• Thermal Shutdown Protection
• Short-Circuit Current Limiting
• Small Package Size: SOT-23-5

Package

The MIC4680-1.8BM is available in a small SOT-23-5 package.

Essence

This voltage regulator provides a stable output voltage of 1.8V, even when the input voltage varies within a certain range.

Packaging/Quantity

The MIC4680-1.8BM is typically packaged in reels or tubes and is available in quantities suitable for both prototyping and production purposes.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage: 1.8V
• Output Current: Up to 500mA
• Dropout Voltage: 200mV at 500mA
• Quiescent Current: 60µA
• Power Supply Rejection Ratio (PSRR): 70dB at 1kHz
• Operating Temperature Range: -40°C to +125°C
• Package Type: SOT-23-5

Detailed Pin Configuration

The MIC4680-1.8BM has five pins arranged as follows:

```

---

| | --| |-- |____| ```

Pin 1: Input Voltage (VIN) Pin 2: Ground (GND) Pin 3: Output Voltage (VOUT) Pin 4: Bypass Capacitor (BYP) Pin 5: Enable/Shutdown (EN)

Functional Features

• Voltage Regulation: The MIC4680-1.8BM ensures a stable output voltage of 1.8V, regardless of input voltage fluctuations.
• Low Dropout Voltage: With a dropout voltage of only 200mV at 500mA, this regulator minimizes power dissipation and maximizes efficiency.
• Low Quiescent Current: The device consumes only 60µA of current when in operation, reducing power consumption.
• Thermal Shutdown Protection: The regulator includes built-in thermal shutdown protection to prevent damage due to excessive temperature.
• Short-Circuit Current Limiting: It incorporates short-circuit current limiting to protect the circuit from excessive current flow.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for flexibility in various applications.
• Low dropout voltage minimizes power dissipation.
• Small package size enables space-saving designs.
• Thermal shutdown protection prevents overheating.
• Short-circuit current limiting protects the circuit.

Disadvantages

• Limited maximum output current of 500mA may not be suitable for high-power applications.
• Requires an external bypass capacitor for optimal performance.

Working Principles

The MIC4680-1.8BM is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a constant output voltage of 1.8V. The regulator operates by dissipating excess voltage as heat, resulting in a low dropout voltage.

Detailed Application Field Plans

The MIC4680-1.8BM finds applications in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable consumer electronics - Embedded systems - IoT devices - Communication equipment

Detailed and Complete Alternative Models

• MIC4680-1.8YM: Similar specifications but available in a different package (SOT-89-5).
• LT1763-1.8: Low dropout linear regulator with similar characteristics.
• LM1117-1.8: Popular voltage regulator with a fixed output voltage of 1.8V.

These alternative models offer similar functionality and can be considered as substitutes for the MIC4680-1.8BM depending on specific requirements.

In conclusion, the MIC4680-1.8BM is a voltage regulator that provides stable 1.8V output voltage with low dropout and quiescent current. It offers thermal shutdown protection and short-circuit current limiting. This device finds applications in various electronic systems and has alternative models available for different package options or specific needs.