LT1111IS8#TRPBF

Product Overview

Category

LT1111IS8#TRPBF belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a voltage converter or regulator in various electronic devices.

Characteristics

• Input Voltage Range: 2.5V to 18V
• Output Voltage Range: 1.24V to 16V
• Maximum Output Current: 500mA
• Operating Temperature Range: -40°C to 85°C
• Package Type: SOIC-8

Package and Quantity

The LT1111IS8#TRPBF is available in an SOIC-8 package. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 2.5V to 18V
• Output Voltage Range: 1.24V to 16V
• Maximum Output Current: 500mA
• Switching Frequency: 100kHz to 200kHz
• Quiescent Current: 3.5mA
• Shutdown Current: 10μA
• Duty Cycle Range: 0% to 90%
• Soft-Start Time: 20ms
• Thermal Resistance (θJA): 150°C/W

Pin Configuration

The LT1111IS8#TRPBF has the following pin configuration:

```

---

| | --| VIN GND |-- Pin 1: VIN (Input Voltage) --| SW FB |-- Pin 2: SW (Switch Node) --| GND VOUT|-- Pin 3: GND (Ground) --| COMP NC |-- Pin 4: COMP (Compensation) |___________| ```

Functional Features

1. Wide Input Voltage Range: The LT1111IS8#TRPBF can accept input voltages ranging from 2.5V to 18V, making it suitable for a wide range of applications.
2. High Efficiency: It utilizes a high-frequency switching regulator architecture, resulting in improved efficiency compared to linear regulators.
3. Adjustable Output Voltage: The output voltage can be adjusted within the range of 1.24V to 16V, providing flexibility for different application requirements.
4. Current Limit Protection: The IC incorporates current limit protection to prevent excessive current flow and protect the circuitry.
5. Shutdown Mode: It features a low-power shutdown mode, reducing power consumption when the device is not in use.

Advantages and Disadvantages

Advantages

• Wide input voltage range allows for versatile applications.
• High efficiency leads to reduced power dissipation.
• Adjustable output voltage provides flexibility.
• Current limit protection enhances circuit safety.
• Shutdown mode reduces power consumption during idle periods.

Disadvantages

• Limited maximum output current (500mA) may not be sufficient for high-power applications.
• Thermal considerations should be taken into account due to the package's thermal resistance.

Working Principles

The LT1111IS8#TRPBF operates as a step-up voltage converter or regulator. It utilizes a switching regulator architecture to efficiently convert the input voltage to the desired output voltage. The internal control circuitry adjusts the duty cycle of the switching transistor to regulate the output voltage. Feedback from the output voltage is used to maintain the desired voltage level.

Detailed Application Field Plans

The LT1111IS8#TRPBF finds applications in various electronic devices, including but not limited to: - Battery-powered devices requiring efficient voltage conversion. - Portable electronics such as smartphones, tablets, and portable media players. - Automotive electronics for voltage regulation in vehicle systems. - Industrial equipment requiring stable and adjustable power supplies.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to LT1111IS8#TRPBF are: - LT1110: Similar functionality with a lower maximum output current. - LT1112: Higher maximum output current but with a different pin configuration. - LT1113: Lower quiescent current and wider input voltage range.

These alternative models provide options based on specific requirements and constraints of the application.

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