LM3487QMMX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High Efficiency, Wide Input Voltage Range, Adjustable Output Voltage, Small Package Size
• Package: 10-Pin VSSOP
• Essence: The LM3487QMMX/NOPB is a high-efficiency synchronous buck regulator designed for use in various applications requiring a regulated power supply.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 4.5V to 36V
• Output Voltage Range: 0.8V to VIN
• Switching Frequency: Up to 2MHz
• Maximum Output Current: 1.5A
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3487QMMX/NOPB has the following pin configuration:

1. EN (Enable): Enable input pin for turning the regulator on/off.
2. FB (Feedback): Feedback pin for adjusting the output voltage.
3. SW (Switch): Switching node connection for the internal MOSFETs.
4. GND (Ground): Ground reference for the IC.
5. PGND (Power Ground): Power ground connection for the internal MOSFETs.
6. LX (Inductor Connection): Connection to the inductor.
7. COMP (Compensation): Compensation pin for stability control.
8. SS/TR (Soft-Start/Tracking): Soft-start and tracking control pin.
9. VCC (Voltage Input): Input voltage supply for the IC.
10. BST (Bootstrap): Bootstrap capacitor connection for driving the high-side MOSFET.

Functional Features

• High efficiency conversion of input voltage to regulated output voltage.
• Wide input voltage range allows for versatile applications.
• Adjustable output voltage provides flexibility in power supply design.
• Synchronous rectification minimizes power losses.
• Integrated protection features such as overcurrent and thermal shutdown.

Advantages

• High efficiency results in reduced power dissipation and longer battery life.
• Wide input voltage range enables compatibility with various power sources.
• Small package size saves board space in compact designs.
• Adjustable output voltage allows customization for specific requirements.
• Integrated protection features enhance system reliability.

Disadvantages

• Higher cost compared to non-synchronous buck regulators.
• Requires careful consideration of external components for optimal performance.
• Limited maximum output current may not be suitable for high-power applications.

Working Principles

The LM3487QMMX/NOPB operates as a synchronous buck regulator, converting a higher input voltage to a lower regulated output voltage. It utilizes pulse-width modulation (PWM) control to regulate the output voltage. The internal MOSFETs switch on and off at a high frequency, allowing efficient energy transfer from the input to the output. Synchronous rectification reduces power losses by using a low-side MOSFET to replace the diode typically found in non-synchronous designs.

Detailed Application Field Plans

The LM3487QMMX/NOPB is suitable for a wide range of applications, including but not limited to:

1. Battery-powered devices: Provides regulated power supply for portable electronics, IoT devices, and handheld instruments.
2. Industrial automation: Used in control systems, motor drives, and power management modules.
3. Automotive electronics: Suitable for powering infotainment systems, lighting modules, and advanced driver-assistance systems (ADAS).
4. Telecommunications: Used in network equipment, base stations, and communication devices.
5. LED lighting: Provides efficient power conversion for LED drivers and lighting fixtures.

Detailed and Complete Alternative Models

1. LM3489QMMX/NOPB: Similar to LM3487QMMX/NOPB but with a higher maximum output current of 2A.
2. LM3490QMMX/NOPB: Buck regulator with adjustable output voltage and integrated power MOSFETs.
3. LM2576-ADJ: Non-synchronous buck regulator with adjustable output voltage and higher maximum output current.

(Note: This is not an exhaustive list, and there are several other alternative models available in the market.)

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