LM2791LD-L

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High efficiency voltage regulator - Low dropout voltage - Adjustable output voltage - Thermal shutdown protection - Overcurrent protection - Short-circuit protection

Package: 8-pin SOIC (Small Outline Integrated Circuit)

Essence: The LM2791LD-L is a power management IC designed to regulate voltage efficiently with low dropout. It provides adjustable output voltage and offers various protection features.

Packaging/Quantity: The LM2791LD-L is available in a standard 8-pin SOIC package. It is typically sold in reels of 2500 units.

Specifications

The LM2791LD-L has the following specifications:

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.8V to VIN
• Dropout Voltage: 200mV at 150mA Load Current
• Quiescent Current: 75µA (typical)
• Maximum Output Current: 150mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM2791LD-L has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. EN (Enable)
4. FB (Feedback)
5. VOUT (Output Voltage)
6. NC (No Connection)
7. NC (No Connection)
8. VOUT (Output Voltage)

Functional Features

The LM2791LD-L offers the following functional features:

• Adjustable output voltage through external resistors
• Thermal shutdown protection prevents overheating
• Overcurrent protection safeguards against excessive current flow
• Short-circuit protection prevents damage during short circuits
• Enable pin for easy on/off control

Advantages and Disadvantages

Advantages: - High efficiency voltage regulation - Low dropout voltage for improved power efficiency - Adjustable output voltage for flexibility - Multiple protection features for enhanced reliability - Compact 8-pin SOIC package for space-saving designs

Disadvantages: - Maximum output current limited to 150mA - Limited input voltage range (2.7V to 5.5V)

Working Principles

The LM2791LD-L operates as a linear voltage regulator. It regulates the output voltage by comparing it with a reference voltage generated internally. The feedback pin (FB) is used to adjust the output voltage through external resistors. The enable pin (EN) controls the on/off state of the regulator.

When the input voltage (VIN) is within the specified range, the LM2791LD-L provides a stable and regulated output voltage (VOUT). It incorporates various protection mechanisms such as thermal shutdown, overcurrent protection, and short-circuit protection to ensure safe operation.

Detailed Application Field Plans

The LM2791LD-L is suitable for various applications that require efficient voltage regulation with low dropout. Some potential application fields include:

1. Battery-powered devices: Portable electronics, handheld instruments, wireless sensors.
2. Automotive systems: Infotainment systems, dashboard displays, lighting control.
3. Industrial equipment: Control systems, motor drives, sensors, communication modules.
4. IoT devices: Smart home devices, wearables, connected sensors.
5. Consumer electronics: Audio/video equipment, gaming consoles, digital cameras.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable voltage regulator with higher maximum output current (800mA).
2. LM317T: Adjustable voltage regulator with wider input voltage range (1.25V to 37V).
3. LT1763-3.3: Fixed output voltage regulator with lower dropout voltage (200mV at 500mA).

These alternative models offer different specifications and features, providing options for specific application requirements.

Word count: 511 words