LM2651MTCX-ADJ/NOPB

Product Overview

Category

The LM2651MTCX-ADJ/NOPB belongs to the category of voltage regulators.

Use

This product is commonly used in electronic circuits to regulate and control the voltage supplied to various components.

Characteristics

• Adjustable output voltage
• High efficiency
• Low dropout voltage
• Small package size
• Wide input voltage range

Package

The LM2651MTCX-ADJ/NOPB comes in a small surface-mount package, typically in a 16-pin TSSOP (Thin Shrink Small Outline Package) format.

Essence

The essence of the LM2651MTCX-ADJ/NOPB lies in its ability to efficiently regulate and stabilize voltage levels, ensuring reliable operation of electronic devices.

Packaging/Quantity

This product is usually packaged in reels or tubes, with quantities varying depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: Adjustable from 0.8V to VIN
• Maximum Output Current: 1A
• Dropout Voltage: 200mV (typical)
• Operating Temperature Range: -40°C to 125°C
• Quiescent Current: 60µA (typical)

Detailed Pin Configuration

The LM2651MTCX-ADJ/NOPB has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. EN (Enable): Controls the regulator's enable/disable state.
2. FB (Feedback): Provides feedback for regulating the output voltage.
3. COMP (Compensation): Connects an external compensation network for stability.
4. SS/TR (Soft-Start/Tracking): Sets the soft-start time and enables tracking mode.
5. PG (Power Good): Indicates the output voltage is within regulation limits.
6. GND (Ground): Common ground reference for the regulator.
7. SW (Switch Node): Connects to the inductor and serves as the switching node.
8. LX (Inductor Connection): Connects to the inductor's other terminal. 9-16. NC (No Connection): These pins are not connected and should be left unconnected.

Functional Features

1. Adjustable Output Voltage: The LM2651MTCX-ADJ/NOPB allows users to set the desired output voltage within a specified range.
2. High Efficiency: This voltage regulator offers high efficiency, minimizing power losses during operation.
3. Low Dropout Voltage: The low dropout voltage ensures stable output even when the input voltage is close to the desired output voltage.
4. Overcurrent Protection: The device incorporates overcurrent protection to safeguard against excessive current flow.
5. Thermal Shutdown: In case of excessive temperature, the regulator automatically shuts down to prevent damage.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows compatibility with various power sources.
• Small package size enables space-saving designs.
• Adjustable output voltage provides flexibility for different applications.
• High efficiency reduces power consumption and heat dissipation.
• Overcurrent protection and thermal shutdown enhance system reliability.

Disadvantages

• Limited maximum output current may restrict usage in high-power applications.
• External compensation network required for stability may increase complexity.

Working Principles

The LM2651MTCX-ADJ/NOPB operates as a step-down (buck) voltage regulator. It uses a pulse-width modulation (PWM) control scheme to regulate the output voltage. The internal control circuitry compares the feedback voltage with a reference voltage and adjusts the duty cycle of the switching transistor accordingly. This regulates the output voltage within the desired range.

Detailed Application Field Plans

The LM2651MTCX-ADJ/NOPB finds applications in various electronic systems, including but not limited to: - Battery-powered devices - Portable electronics - IoT (Internet of Things) devices - Embedded systems - Automotive electronics

Detailed and Complete Alternative Models

1. LM2576-ADJ: Adjustable voltage regulator with a higher maximum output current of 3A.
2. LM317T: Adjustable linear voltage regulator with a wider input voltage range.
3. TPS5430: Synchronous buck converter with adjustable output voltage and higher efficiency.

These alternative models offer similar functionality and can be considered as substitutes for the LM2651MTCX-ADJ/NOPB depending on specific requirements.

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