NJM723M

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High precision, adjustable output voltage, low dropout voltage, current limiting, thermal shutdown protection
• Package: DIP-14 (Dual In-line Package with 14 pins)
• Essence: The NJM723M is a versatile voltage regulator IC that provides stable and adjustable output voltage for various electronic applications.
• Packaging/Quantity: Available in reels or tubes, typically sold in quantities of 100 or more.

Specifications

• Input Voltage Range: 2.5V to 40V
• Output Voltage Range: 1.25V to 37V
• Output Current: Up to 150mA
• Dropout Voltage: 0.6V typical at 100mA load
• Line Regulation: 0.01%/V
• Load Regulation: 0.1%/mA
• Quiescent Current: 10mA typical
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NJM723M has a total of 14 pins arranged as follows:

```

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| | | 1 7 14| | | | 2 6 13| | | | 3 5 12| | | | 4 8 11| |___________| ```

1. Vref: Reference Voltage Output
2. Vz: Zener Diode Connection
3. Vin: Input Voltage
4. GND: Ground
5. Vout: Output Voltage
6. Iadj: Adjustable Current
7. Cadj: Capacitor Adjust
8. Vcc: Supply Voltage
9. NC: No Connection
10. NC: No Connection
11. NC: No Connection
12. NC: No Connection
13. NC: No Connection
14. NC: No Connection

Functional Features

• Adjustable Output Voltage: The NJM723M allows the user to set the desired output voltage within a wide range.
• Current Limiting: Protects the circuit by limiting the maximum current that can be drawn from the regulator.
• Thermal Shutdown Protection: Automatically shuts down the regulator if the temperature exceeds a safe limit, preventing damage to the IC.
• Low Dropout Voltage: Provides a stable output voltage even when the input voltage is close to the desired output voltage.

Advantages and Disadvantages

Advantages: - High precision and stability - Wide input voltage range - Adjustable output voltage - Current limiting and thermal shutdown protection for enhanced safety - Low dropout voltage for efficient operation

Disadvantages: - Limited output current capacity (up to 150mA) - Requires external components for precise voltage adjustment

Working Principles

The NJM723M operates as a linear voltage regulator. It uses a feedback mechanism to maintain a constant output voltage regardless of variations in the input voltage or load conditions. By adjusting the reference voltage and using an error amplifier, it compares the actual output voltage with the desired voltage and adjusts the internal circuitry accordingly.

Detailed Application Field Plans

The NJM723M finds applications in various electronic systems where a stable and adjustable voltage supply is required. Some common application areas include:

1. Power supply circuits for microcontrollers and other digital ICs
2. Battery charging circuits
3. Audio amplifiers and preamplifiers
4. Instrumentation and measurement equipment
5. LED drivers
6. Automotive electronics
7. Industrial control systems

Detailed and Complete Alternative Models

1. LM317: A popular alternative with similar features and pin configuration.
2. LT1083: Higher current capacity alternative suitable for power-hungry applications.
3. LM7805: Fixed output voltage regulator alternative for 5V applications.
4. LM1117: Low dropout voltage regulator alternative for battery-powered devices.

These are just a few examples, and there are many other alternatives available in the market depending on specific requirements.

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