LM397MF

Product Overview

Category: Integrated Circuit (IC)

Use: LM397MF is a voltage regulator IC primarily used for regulating and stabilizing the output voltage in electronic circuits.

Characteristics: - High precision voltage regulation - Low dropout voltage - Wide input voltage range - Thermal shutdown protection - Short circuit protection

Package: LM397MF is available in a small outline package (SOP) with 8 pins.

Essence: The essence of LM397MF lies in its ability to provide stable and regulated voltage output, ensuring reliable operation of electronic devices.

Packaging/Quantity: LM397MF is typically sold in reels or tubes containing a quantity of 1000 units per package.

Specifications

• Input Voltage Range: 2.5V - 16V
• Output Voltage Range: 1.2V - 15V
• Dropout Voltage: 0.3V (typical)
• Maximum Output Current: 500mA
• Quiescent Current: 75µA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

LM397MF features the following pin configuration:

1. GND (Ground): Connected to the ground reference of the circuit.
2. IN (Input): Receives the unregulated input voltage.
3. EN (Enable): Controls the enable/disable functionality of the IC.
4. BYP (Bypass): Connects an external capacitor for stability enhancement.
5. VOUT (Output): Provides the regulated output voltage.
6. NC (No Connection): This pin is not internally connected and can be left unconnected.
7. NC (No Connection): This pin is not internally connected and can be left unconnected.
8. VIN (Voltage In): Connected to the positive terminal of the input voltage source.

Functional Features

• High Precision Regulation: LM397MF ensures precise voltage regulation, minimizing output voltage fluctuations.
• Low Dropout Voltage: The IC exhibits a low dropout voltage, enabling efficient operation even with small input-output voltage differentials.
• Wide Input Voltage Range: It can accept a wide range of input voltages, making it suitable for various applications.
• Thermal Shutdown Protection: LM397MF incorporates thermal shutdown protection, preventing damage due to excessive heat.
• Short Circuit Protection: The IC is equipped with short circuit protection, safeguarding the circuit from potential damage.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Low dropout voltage - Wide input voltage range - Thermal and short circuit protection

Disadvantages: - Limited maximum output current (500mA) - Requires external bypass capacitor for stability enhancement

Working Principles

LM397MF operates based on the principle of feedback control. It compares the output voltage with a reference voltage and adjusts the internal circuitry to maintain a stable output voltage. By continuously monitoring and regulating the voltage, it compensates for variations in the input voltage and load conditions.

Detailed Application Field Plans

LM397MF finds application in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable audio players - Mobile phones - Digital cameras - Wireless communication systems - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to LM397MF include: - LM317MF - LT1084CP - ADP3339AKCZ

These alternatives provide comparable voltage regulation capabilities and can be considered as substitutes for LM397MF in specific applications.

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