LM27961TLX/NOPB

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

Package: Thin SOT-23 (TSOT-23) package

Essence: The LM27961TLX/NOPB is a power management IC designed for efficient voltage regulation in various electronic devices.

Packaging/Quantity: Available in tape and reel packaging, with 3000 units per reel.

Specifications

The LM27961TLX/NOPB has the following specifications:

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.2V to 3.6V
• Dropout Voltage: 200mV at 150mA
• Quiescent Current: 45µA
• Maximum Output Current: 150mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM27961TLX/NOPB has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for adjusting output voltage
4. EN: Enable pin for turning the regulator on/off
5. VOUT: Output voltage pin

Functional Features

• High efficiency: The LM27961TLX/NOPB provides efficient voltage regulation, minimizing power loss.
• Low dropout voltage: It maintains stable output voltage even when the input voltage is close to the desired output voltage.
• Adjustable output voltage: The feedback pin allows users to adjust the output voltage according to their specific requirements.
• Thermal shutdown protection: The IC automatically shuts down if the temperature exceeds a certain threshold, preventing damage due to overheating.
• Overcurrent protection: It safeguards the IC and connected devices by limiting the output current in case of a short circuit or excessive load.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Adjustable output voltage provides flexibility for different applications. - Thermal shutdown and overcurrent protection enhance reliability and safety.

Disadvantages: - Limited maximum output current may not be suitable for high-power applications. - Requires external components for proper operation.

Working Principles

The LM27961TLX/NOPB is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the feedback voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage. The dropout voltage is minimized to ensure efficient regulation even when the input voltage is close to the desired output voltage.

Detailed Application Field Plans

The LM27961TLX/NOPB is commonly used in various battery-powered electronic devices, such as:

1. Mobile phones
2. Portable media players
3. Digital cameras
4. Handheld gaming consoles
5. Wireless headsets

Its efficient voltage regulation and low quiescent current make it suitable for applications where power efficiency and extended battery life are crucial.

Detailed and Complete Alternative Models

1. LM317: Adjustable positive voltage regulator with higher maximum output current.
2. LM1117: Fixed output voltage regulator available in various voltage options.
3. LT1763: Low dropout voltage regulator with adjustable output voltage.
4. TPS799: Ultra-low quiescent current voltage regulator for power-sensitive applications.

These alternative models offer similar functionality and can be considered based on specific requirements and design constraints.

Word count: 342 words