LT1761IS5-3#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low Dropout Voltage - Low Quiescent Current - High Output Voltage Accuracy - Thermal Shutdown Protection - Reverse Battery Protection - Short-Circuit Protection

Package: SOT-23-5

Essence: The LT1761IS5-3#TRPBF is a low dropout voltage regulator designed to provide a stable output voltage with high accuracy and low quiescent current. It is commonly used in various electronic devices to regulate the voltage supplied to sensitive components.

Packaging/Quantity: The LT1761IS5-3#TRPBF is available in a SOT-23-5 package, which consists of a small plastic body with five leads. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 2.5V to 20V
• Output Voltage: 3.0V
• Dropout Voltage: 300mV at 100mA Load Current
• Quiescent Current: 40µA
• Output Current: Up to 100mA
• Line Regulation: ±0.02%
• Load Regulation: ±0.05%
• Operating Temperature Range: -40°C to 125°C

Pin Configuration

The LT1761IS5-3#TRPBF has five pins arranged as follows:

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Pin 1: VIN (Input Voltage) Pin 2: GND (Ground) Pin 3: NC (No Connection) Pin 4: VOUT (Output Voltage) Pin 5: SHDN (Shutdown Control)

Functional Features

1. Low Dropout Voltage: The LT1761IS5-3#TRPBF exhibits a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.

2. Low Quiescent Current: With a quiescent current of only 40µA, the LT1761IS5-3#TRPBF minimizes power consumption and extends battery life in portable devices.

3. High Output Voltage Accuracy: The voltage regulator provides high accuracy in maintaining the desired output voltage, ensuring stable operation of connected components.

4. Thermal Shutdown Protection: The LT1761IS5-3#TRPBF includes thermal shutdown protection, which prevents damage due to excessive temperature by disabling the regulator until it cools down.

5. Reverse Battery Protection: This feature safeguards the regulator and the connected circuitry from potential damage caused by reverse polarity connection.

6. Short-Circuit Protection: The LT1761IS5-3#TRPBF incorporates short-circuit protection, preventing excessive current flow and protecting the device and other components from damage.

Advantages

• Low dropout voltage enables efficient regulation even with small voltage differentials.
• Low quiescent current reduces power consumption and extends battery life.
• High output voltage accuracy ensures stable performance of connected components.
• Thermal shutdown protection prevents overheating and subsequent damage.
• Reverse battery protection safeguards against incorrect polarity connections.
• Short-circuit protection prevents damage due to excessive current flow.

Disadvantages

• Limited output current capacity (up to 100mA), may not be suitable for high-power applications.
• No adjustable output voltage option, fixed at 3.0V.

Working Principles

The LT1761IS5-3#TRPBF operates as a linear voltage regulator. It regulates the output voltage by comparing the reference voltage with the feedback voltage obtained from a resistive voltage divider connected to the output. The regulator adjusts the pass transistor's resistance to maintain a stable output voltage, compensating for changes in input voltage and load conditions.

Application Field Plans

The LT1761IS5-3#TRPBF finds applications in various electronic devices that require stable and accurate voltage regulation. Some potential application fields include:

1. Portable Electronics: Battery-powered devices such as smartphones, tablets, and portable media players benefit from the LT1761IS5-3#TRPBF's low quiescent current and thermal shutdown protection.

2. Wireless Communication Systems: The voltage regulator can be used in wireless communication systems, ensuring stable power supply to critical components like RF modules and microcontrollers.

3. Automotive Electronics: The LT1761IS5-3#TRPBF's reverse battery protection and short-circuit protection make it suitable for automotive applications, protecting sensitive electronics from potential damage.

4. Industrial Control Systems: Voltage regulation is crucial in industrial control systems to ensure reliable operation of sensors, actuators, and other components. The LT1761IS5-3#TRPBF provides the necessary