NCV33172DR2

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Wide input voltage range - Thermal shutdown protection - Overcurrent protection - Adjustable output voltage

Package: SOIC-8

Essence: The NCV33172DR2 is a voltage regulator IC that provides a stable output voltage from a varying input voltage source.

Packaging/Quantity: The NCV33172DR2 is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 40V
• Output Voltage Range: 1.25V to 37V
• Dropout Voltage: 0.5V (typical)
• Output Current: Up to 1A
• Quiescent Current: 10mA (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The NCV33172DR2 has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. ADJ: Output voltage adjustment pin
4. VOUT: Output voltage pin
5. NC: No connection
6. NC: No connection
7. NC: No connection
8. EN: Enable pin

Functional Features

• Low Dropout Voltage: The NCV33172DR2 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, this voltage regulator can handle high current loads.
• Wide Input Voltage Range: The IC can accept input voltages ranging from 2.7V to 40V, making it suitable for a wide range of applications.
• Thermal Shutdown Protection: The NCV33172DR2 includes thermal shutdown protection, which prevents the IC from overheating and damaging itself.
• Overcurrent Protection: It also features overcurrent protection, safeguarding the regulator and the connected circuitry from excessive current.
• Adjustable Output Voltage: The output voltage can be adjusted using an external resistor connected to the ADJ pin.

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile applications - High output current capability suits power-hungry devices - Thermal shutdown and overcurrent protection enhance reliability - Adjustable output voltage provides flexibility

Disadvantages: - Dropout voltage of 0.5V may limit efficiency in low-power applications - Limited pin configuration options restricts customization possibilities

Working Principles

The NCV33172DR2 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly to maintain a stable output voltage.

When the input voltage exceeds the desired output voltage, the pass transistor reduces its resistance, allowing more current to flow through it. Conversely, when the input voltage drops below the desired output voltage, the pass transistor increases its resistance, reducing the current flow.

This feedback loop ensures that the output voltage remains constant despite variations in the input voltage.

Detailed Application Field Plans

The NCV33172DR2 is commonly used in various applications, including:

1. Automotive Electronics: The IC is suitable for automotive electronics, such as engine control units (ECUs), powertrain systems, and lighting systems, where stable voltage regulation is crucial.
2. Industrial Control Systems: It finds application in industrial control systems, providing reliable voltage regulation for sensors, actuators, and other control circuitry.
3. Power Supplies: The voltage regulator is used in power supply circuits to ensure a stable output voltage for electronic devices.
4. Battery-Powered Devices: It can be employed in battery-powered devices, such as portable medical equipment, handheld instruments, and consumer electronics, to maintain a consistent voltage level.

Detailed and Complete Alternative Models

1. LM317: A popular linear voltage regulator with adjustable output voltage and high current capability.
2. LT1084: A low dropout voltage regulator with adjustable output voltage and high output current capability.
3. LM7805: A fixed-output voltage regulator that provides a stable 5V output voltage.
4. LM1117: A low dropout voltage regulator available in various fixed output voltages.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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