MIC4690BM

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Thermal shutdown protection - Short-circuit current limit - Adjustable output voltage - Low quiescent current

Package: SOIC-8

Essence: The MIC4690BM is a voltage regulator IC that provides a stable output voltage from an input voltage source. It is commonly used in electronic devices to regulate and maintain a constant voltage level for various components.

Packaging/Quantity: The MIC4690BM is available in a standard SOIC-8 package. Each package contains one IC.

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage Range: 1.25V to 13.5V
• Output Current: Up to 1A
• Dropout Voltage: 200mV at 500mA
• Quiescent Current: 120µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The MIC4690BM has the following pin configuration:

```

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| | --| Vin GND |-- Pin 1: Ground --| Vout NC |-- Pin 2: No Connection --| ADJ NC |-- Pin 3: No Connection --| NC NC |-- Pin 4: No Connection --| NC NC |-- Pin 5: No Connection --| NC NC |-- Pin 6: No Connection --| NC NC |-- Pin 7: No Connection --| NC NC |-- Pin 8: No Connection |___________| ```

Functional Features

• Low Dropout Voltage: The MIC4690BM has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With a maximum output current of 1A, the MIC4690BM can provide sufficient power for various electronic components.
• Thermal Shutdown Protection: The IC includes thermal shutdown protection, which prevents damage due to excessive heat by shutting down the regulator when the temperature exceeds a certain threshold.
• Short-Circuit Current Limit: The MIC4690BM has built-in short-circuit current limiting, protecting the circuit from excessive current in case of a short circuit.
• Adjustable Output Voltage: The output voltage of the MIC4690BM can be adjusted within a specified range using an external resistor.
• Low Quiescent Current: The quiescent current of the IC is very low, minimizing power consumption when the load is light.

Advantages and Disadvantages

Advantages: - Stable and regulated output voltage - Wide input voltage range - High output current capability - Thermal shutdown protection ensures safety - Adjustable output voltage for flexibility - Low quiescent current reduces power consumption

Disadvantages: - Limited output current compared to higher-power regulators - Requires an external resistor for output voltage adjustment

Working Principles

The MIC4690BM operates as a linear voltage regulator. It uses a pass transistor to control the output voltage based on the feedback received from the output. When the input voltage is higher than the desired output voltage, the pass transistor adjusts its resistance to maintain a constant output voltage. The regulator continuously monitors the output voltage and adjusts the pass transistor accordingly to ensure stability.

Detailed Application Field Plans

The MIC4690BM is commonly used in various applications where a stable and regulated voltage supply is required. Some typical application fields include: - Battery-powered devices - Portable electronic devices - Automotive electronics - Industrial control systems - Communication equipment

Detailed and Complete Alternative Models

• LM317: A popular adjustable voltage regulator with similar features.
• LM1117: A low dropout voltage regulator suitable for low-power applications.
• LT1084: A high-current, adjustable linear regulator with thermal shutdown protection.

These alternative models offer similar functionality and can be used as substitutes for the MIC4690BM in various applications.

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