LM2621MMX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Boost Converter

Characteristics: - High efficiency voltage boost converter - Wide input voltage range: 1.8V to 14V - Adjustable output voltage up to 14V - Low shutdown current: 0.01µA - Small package size: SOT-23-6 - RoHS compliant

Package: SOT-23-6

Essence: The LM2621MMX/NOPB is a high-efficiency voltage boost converter IC designed for various applications that require a higher output voltage than the input voltage.

Packaging/Quantity: The LM2621MMX/NOPB is available in a SOT-23-6 package and is typically sold in reels of 3000 units.

Specifications

• Input Voltage Range: 1.8V to 14V
• Output Voltage Range: Up to 14V (adjustable)
• Switching Frequency: 1.6MHz
• Maximum Output Current: 1A
• Shutdown Current: 0.01µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2621MMX/NOPB has six pins arranged as follows:

____ EN | | VOUT GND | | SW VIN |____| FB

• EN: Enable pin (Active High)
• VOUT: Output voltage pin
• GND: Ground pin
• SW: Switch pin
• VIN: Input voltage pin
• FB: Feedback pin

Functional Features

• High Efficiency: The LM2621MMX/NOPB utilizes a high-efficiency switch-mode architecture, resulting in minimal power loss during voltage conversion.
• Wide Input Voltage Range: The IC can accept input voltages ranging from 1.8V to 14V, making it suitable for a wide range of applications.
• Adjustable Output Voltage: The output voltage can be adjusted up to 14V using external resistors.
• Low Shutdown Current: In shutdown mode, the LM2621MMX/NOPB consumes only 0.01µA, minimizing power consumption when not in use.
• Small Package Size: The SOT-23-6 package offers a compact form factor, making it ideal for space-constrained applications.
• RoHS Compliant: The LM2621MMX/NOPB is compliant with the Restriction of Hazardous Substances (RoHS) directive, ensuring environmental friendliness.

Advantages and Disadvantages

Advantages: - High efficiency results in minimal power loss - Wide input voltage range allows for versatile application - Adjustable output voltage provides flexibility - Low shutdown current minimizes power consumption - Compact package size enables space-saving designs - RoHS compliance ensures environmental friendliness

Disadvantages: - Limited maximum output current (1A)

Working Principles

The LM2621MMX/NOPB operates as a voltage boost converter. It utilizes a switch-mode architecture to efficiently step up the input voltage to a higher output voltage. The internal control circuitry regulates the switching frequency and duty cycle to maintain the desired output voltage. The feedback pin (FB) is used to sense the output voltage and provide feedback to the control circuit, ensuring stable and accurate voltage conversion.

Detailed Application Field Plans

The LM2621MMX/NOPB is widely used in various applications that require a higher output voltage than the input voltage. Some common application fields include:

1. Battery-Powered Devices: The IC can be used to boost the battery voltage to power components that require a higher voltage, such as LCD displays, LED drivers, and audio amplifiers.
2. Portable Electronics: It is suitable for portable electronic devices like smartphones, tablets, and portable media players, where efficient voltage conversion is essential to prolong battery life.
3. Industrial Automation: The LM2621MMX/NOPB can be employed in industrial automation systems to power sensors, actuators, and control circuits that require higher voltages.
4. Automotive Electronics: It finds applications in automotive electronics, such as powering infotainment systems, navigation units, and lighting modules.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM2621MMX/NOPB include:

1. LT1308: High Efficiency 1.5A Boost Converter
2. MAX1771: Step-Up DC-DC Converter with Integrated Switch
3. TPS61220: 1.8V to 5.5V Input, 1.2A Boost Converter
4. ADP1613: 1.2 MHz, 600 mA Synchronous Boost Converter

These alternative models provide comparable features and can be considered based on specific