LT1175IST-5

Product Overview

Category

The LT1175IST-5 belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 4.2V to 60V
• Output Voltage: 5V
• Maximum Output Current: 500mA
• Dropout Voltage: 1.2V
• Low Quiescent Current: 75µA
• Package Type: SOT-223
• Operating Temperature Range: -40°C to 125°C

Package and Quantity

The LT1175IST-5 comes in a SOT-223 package. It is typically sold in quantities of one or more.

Specifications

• Input Voltage Range: The LT1175IST-5 can accept input voltages ranging from 4.2V to 60V.
• Output Voltage: It provides a fixed output voltage of 5V.
• Maximum Output Current: The maximum current that can be drawn from the regulator is 500mA.
• Dropout Voltage: The dropout voltage of the LT1175IST-5 is 1.2V, which means the input voltage must be at least 1.2V higher than the desired output voltage.
• Quiescent Current: The quiescent current, or the current consumed by the regulator when no load is connected, is low at 75µA.

Pin Configuration

The LT1175IST-5 has the following pin configuration:

```

---

| | --| VIN | --| VOUT | --| GND | --| ADJ | |_______| ```

• VIN: Input voltage pin
• VOUT: Output voltage pin
• GND: Ground pin
• ADJ: Adjust pin (used for fine-tuning the output voltage)

Functional Features

• Voltage Regulation: The LT1175IST-5 provides a stable 5V output voltage, regardless of variations in the input voltage.
• Low Dropout Voltage: With a dropout voltage of only 1.2V, the regulator can operate efficiently even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: The low quiescent current ensures minimal power consumption when the regulator is idle.
• Short Circuit Protection: The LT1175IST-5 incorporates short circuit protection, preventing damage to the regulator and connected components in case of a short circuit.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• Low dropout voltage enables efficient operation.
• Compact SOT-223 package facilitates easy integration into circuits.
• Short circuit protection enhances reliability.

Disadvantages

• Limited maximum output current of 500mA may not be sufficient for high-power applications.
• Fixed output voltage of 5V may not suit all voltage requirements.

Working Principles

The LT1175IST-5 is a linear voltage regulator that uses a feedback mechanism to maintain a constant output voltage. It compares the output voltage with a reference voltage and adjusts the internal circuitry to regulate the output voltage at the desired level. The regulator operates by dissipating excess voltage as heat, which is why it has a dropout voltage requirement.

Detailed Application Field Plans

The LT1175IST-5 finds applications in various electronic systems, including but not limited to: - Battery-powered devices - Automotive electronics - Industrial control systems - Telecommunications equipment - Power supply modules

Alternative Models

Here are some alternative models that offer similar functionality to the LT1175IST-5: - LM317T - LM7805 - LT1084CT - LM1117-5.0

These models can be considered as substitutes depending on specific requirements and availability.

In conclusion, the LT1175IST-5 is a voltage regulator with a wide input voltage range, low dropout voltage, and low quiescent current. It provides a stable 5V output voltage and offers short circuit protection. While it has limitations in terms of maximum output current and fixed output voltage, it finds applications in various electronic systems. Alternative models are available for consideration based on specific needs.