LT1117IST-3.3#PBF

Product Overview

Category

The LT1117IST-3.3#PBF belongs to the category of low dropout voltage regulators.

Use

It is commonly used in electronic circuits to regulate and stabilize the output voltage.

Characteristics

• Low dropout voltage: The LT1117IST-3.3#PBF has a very low dropout voltage, which means it can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• High accuracy: It provides precise voltage regulation with low output voltage tolerance.
• Current limiting: The device incorporates current limiting circuitry to protect against excessive current flow.
• Thermal shutdown: It includes thermal shutdown protection to prevent damage due to overheating.
• Adjustable output voltage: The LT1117IST-3.3#PBF allows for adjustable output voltage within a specified range.

Package

The LT1117IST-3.3#PBF comes in a small surface-mount SOT-223 package.

Essence

The essence of the LT1117IST-3.3#PBF is its ability to provide stable and regulated output voltage in various electronic applications.

Packaging/Quantity

The LT1117IST-3.3#PBF is typically available in reels or tubes, containing a specific quantity per package.

Specifications

• Input Voltage Range: 4.2V to 20V
• Output Voltage: 3.3V
• Dropout Voltage: 1.2V (maximum)
• Output Current: Up to 800mA
• Line Regulation: ±0.2% (typical)
• Load Regulation: ±0.4% (typical)
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT1117IST-3.3#PBF has three pins:

1. VIN (Pin 1): Input voltage pin.
2. VOUT (Pin 2): Output voltage pin.
3. GND (Pin 3): Ground pin.

Functional Features

• Voltage Regulation: The LT1117IST-3.3#PBF maintains a constant output voltage regardless of changes in the input voltage or load conditions.
• Current Limiting: It incorporates current limiting circuitry to protect the device and the connected circuit from excessive current flow.
• Thermal Shutdown: The device includes thermal shutdown protection, which shuts down the regulator if the temperature exceeds a safe limit.
• Adjustable Output: The LT1117IST-3.3#PBF allows for adjustable output voltage within a specified range by using external resistors.

Advantages and Disadvantages

Advantages

• Low dropout voltage ensures efficient power conversion.
• High accuracy provides precise voltage regulation.
• Current limiting protects against excessive current flow.
• Thermal shutdown prevents damage due to overheating.
• Adjustable output voltage offers flexibility in various applications.

Disadvantages

• Limited output current compared to some other regulators.
• SOT-223 package may require surface-mount soldering expertise.

Working Principles

The LT1117IST-3.3#PBF is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The LT1117IST-3.3#PBF finds applications in various electronic devices and systems, including but not limited to: - Battery-powered devices - Embedded systems - Communication equipment - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models to the LT1117IST-3.3#PBF include: - LM1117-3.3 - ADP3333-3.3 - MAX6033

These models offer similar functionality and can be used as alternatives depending on specific requirements.

In conclusion, the LT1117IST-3.3#PBF is a low dropout voltage regulator that provides stable and regulated output voltage in various electronic applications. Its low dropout voltage, high accuracy, and adjustable output voltage make it a versatile choice for many designs. However, it has limitations in terms of output current and package type. Engineers should consider alternative models based on their specific needs.