LM3481QMM/NOPB Converter: Features, Datasheet, Pinout

 This post will introduce this product: LM3481QMM/NOPB:-An Overview of a High-Efficiency Step-Down DC-DC Converter

Introduction:

The LM3481QMM/NOPB is a high-performance step-down DC-DC converter designed to provide efficient power management solutions for a wide range of applications. This article aims to provide an overview of the LM3481QMM/NOPB, highlighting its features, benefits, and applications.

LM3481QMM/NOPB Description

The LM3481 device employs a fixed frequency, Pulse Width Modulation (PWM), current mode control architecture. An external sense resistor senses the peak current through the external MOSFET in a typical application circuit.The voltage across this resistor is applied to the ISEN pin.This voltage is subsequently level shifted and sent into the PWM comparator's positive input.The output voltage is additionally monitored via an external feedback resistor divider network and sent into the negative input (feedback pin, FB) of the error amplifier (EA).The error amplifier's output (COMP pin) is added to the slope correction ramp and supplied into the PWM comparator's negative input.

LM3481QMM/NOPB Pinout

LM3481QMM/NOPB CAD-Model

Symbol

Footprint

3D-Model

LM3481QMM/NOPB Features and Specifications:

High Efficiency: The LM3481QMM/NOPB utilizes a current-mode control architecture, enabling high efficiency and excellent load and line regulation. It offers up to 94% efficiency, reducing power dissipation and maximizing battery life in portable devices.

Wide Input Voltage Range: With an input voltage range of 4.5V to 36V, the LM3481QMM/NOPB can accommodate a variety of power sources, including batteries, adapters, and industrial power supplies.

Adjustable Output Voltage: The output voltage can be adjusted from 0.8V to 33V, making it suitable for a wide range of applications that require different voltage levels.

Integrated Protection Features: The LM3481QMM/NOPB incorporates various protection features, including thermal shutdown, current limit, and under-voltage lockout, ensuring safe and reliable operation.

Small Package: The LM3481QMM/NOPB is available in a compact 10-pin MSOP package, making it suitable for space-constrained applications.

Features
• 10-Lead VSSOP package
• Internal push-pull driver with 1-A peak current
capability
• Current limit and thermal shutdown
• Frequency compensation optimized with a
capacitor and a resistor
• Internal soft start
• Current mode operation
• Adjustable undervoltage lockout with hysteresis
• Pulse skipping at light loads
• Key specifications
– Wide supply voltage range of 2.97 V to 48 V
– 100-kHz to 1-MHz Adjustable and
synchronizable clock frequency
– ±1.5% (over temperature) internal reference
– 10-µA shutdown current (over temperature)
• Create a custom design using the LM3481 with the
WEBENCH Power Designer

LM3481QMM/NOPB Benefits and Advantages:

High Efficiency: The LM3481QMM/NOPB’s high efficiency helps reduce power consumption, leading to longer battery life and lower operating costs.

Flexible Design: The adjustable output voltage and wide input voltage range make the LM3481QMM/NOPB versatile, allowing it to be used in various applications with different power requirements.

Integrated Protection: The built-in protection features enhance system reliability by safeguarding against over-temperature, over-current, and under-voltage conditions.

Compact Size: The small package size of the LM3481QMM/NOPB facilitates easy integration into space-constrained designs, making it suitable for portable devices and other compact applications.

LM3481QMM/NOPB Applications:

The LM3481QMM/NOPB is well-suited for a wide range of applications, including but not limited to:

Portable Devices: It can be used in battery-powered devices such as smartphones, tablets, portable media players, and handheld instruments.

Industrial and Automotive: The LM3481QMM/NOPB is suitable for industrial control systems, automotive electronics, and LED lighting applications.

Power Supplies: It can be used in various power supply designs, including embedded systems, networking equipment, and consumer electronics.

• Boost for audio amplifiers in portable speakers
• Wide input boost, SEPIC, flyback power module
• Isolated Supply (Flyback)
• Battery-powered boost, SEPIC, flyback

LM3481QMM/NOPB Functional blick diagram

Conclusion:

The LM3481QMM/NOPB is a high-efficiency step-down DC-DC converter that offers a wide input voltage range, adjustable output voltage, and integrated protection features. Its small package size and versatile design make it an ideal choice for a variety of applications, including portable devices, industrial control systems, and power supplies. With its high efficiency and reliable performance, the LM3481QMM/NOPB provides an efficient power management solution for modern electronic systems.

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