LT1121ACS8-5

Product Overview

Category

LT1121ACS8-5 belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Input Voltage Range: 2.5V to 20V
• Output Voltage: 5V
• Maximum Output Current: 500mA
• Dropout Voltage: 0.45V
• Low Quiescent Current: 75µA
• Low Shutdown Current: 10µA
• Thermal Shutdown Protection
• Short-Circuit Protection

Package

LT1121ACS8-5 comes in an 8-pin SOIC package.

Essence

The essence of LT1121ACS8-5 lies in its ability to provide a stable and regulated 5V output voltage from a wide range of input voltages.

Packaging/Quantity

LT1121ACS8-5 is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Input Voltage Range: 2.5V to 20V
• Output Voltage: 5V ±2%
• Maximum Output Current: 500mA
• Dropout Voltage: 0.45V (at 500mA)
• Quiescent Current: 75µA
• Shutdown Current: 10µA
• Operating Temperature Range: -40°C to 125°C
• Package Type: 8-Pin SOIC

Detailed Pin Configuration

1. VIN: Input Voltage
2. GND: Ground
3. SHDN: Shutdown Control
4. VOUT: Output Voltage
5. NC: No Connection
6. NC: No Connection
7. NC: No Connection
8. NC: No Connection

Functional Features

• Wide input voltage range allows flexibility in various applications.
• Low quiescent current ensures minimal power consumption during operation.
• Thermal shutdown protection prevents damage due to excessive temperature.
• Short-circuit protection safeguards the regulator and connected components.

Advantages

• Stable and regulated 5V output voltage.
• Wide input voltage range enables compatibility with different power sources.
• Low quiescent current minimizes power consumption.
• Shutdown control feature allows for power-saving when not in use.
• Thermal shutdown and short-circuit protection enhance reliability.

Disadvantages

• Maximum output current limited to 500mA, which may not be sufficient for high-power applications.
• Dropout voltage of 0.45V may result in some power loss.

Working Principles

LT1121ACS8-5 is a linear voltage regulator that utilizes a feedback mechanism to maintain a constant output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the internal circuitry to achieve the desired output. The regulator uses a pass transistor to regulate the voltage and dissipates excess energy as heat.

Detailed Application Field Plans

LT1121ACS8-5 finds applications in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable electronics - Embedded systems - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models to LT1121ACS8-5 include: - LM317: Adjustable Voltage Regulator - LM7805: Fixed 5V Voltage Regulator - LT1084: Adjustable Low Dropout Voltage Regulator - LM1117: Low Dropout Voltage Regulator - MAX603: Micropower Voltage Reference

These alternatives offer similar functionality and can be chosen based on specific requirements and design constraints.

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