LM2642MTCX

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

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

Package: TSSOP-14

Essence: The LM2642MTCX is a power management integrated circuit designed for various applications requiring efficient power conversion.

Packaging/Quantity: The LM2642MTCX is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Maximum Output Current: 1.5A
• Quiescent Current: 60µA
• Switching Frequency: 1.5MHz
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM2642MTCX has the following pin configuration:

1. EN (Enable): Enable control pin for turning the device on/off.
2. FB (Feedback): Feedback pin for setting the output voltage.
3. SW (Switch): Switching node connection for the inductor.
4. GND (Ground): Ground reference for the IC.
5. PG (Power Good): Output voltage monitoring pin.
6. VOUT (Output Voltage): Output voltage connection.
7. COMP (Compensation): Compensation pin for stability adjustment.
8. SS (Soft Start): Soft start capacitor connection.
9. BST (Bootstrap): Bootstrap capacitor connection.
10. LX (Inductor Connection): Inductor connection.
11. AGND (Analog Ground): Analog ground reference.
12. VIN (Input Voltage): Input voltage connection.
13. PGND (Power Ground): Power ground reference.
14. VCC (Supply Voltage): Supply voltage connection.

Functional Features

• High efficiency synchronous buck regulator.
• Adjustable output voltage through feedback pin.
• Soft start function for controlled startup.
• Overcurrent protection to prevent damage.
• Thermal shutdown protection to prevent overheating.
• Power good indicator for output voltage monitoring.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility. - Low quiescent current minimizes standby power consumption. - Overcurrent and thermal shutdown protection enhance reliability.

Disadvantages: - Limited maximum output current of 1.5A may not be suitable for high-power applications. - TSSOP-14 package may require careful handling during assembly.

Working Principles

The LM2642MTCX operates as a synchronous buck regulator, converting the input voltage to a lower, adjustable output voltage. It utilizes pulse-width modulation (PWM) to control the duty cycle of the internal switches, achieving high efficiency power conversion. The feedback pin allows the user to set the desired output voltage, while the soft start function ensures a controlled startup. The device incorporates overcurrent and thermal shutdown protection mechanisms to safeguard against potential damage.

Detailed Application Field Plans

The LM2642MTCX is commonly used in various applications, including but not limited to: - Portable electronic devices - Battery-powered systems - Industrial equipment - Automotive electronics - Telecommunications equipment

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the LM2642MTCX are: - LM2641 - LM2643 - LM2644 - LM2645

These models offer similar functionality and characteristics, providing options for different design requirements.

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