LP38690DT-1.8

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Linear voltage regulators are key components in power management in many applications and the LP38690DT-1.8 is a popular device from Texas Instruments targeted for the use in the mobile industry. This regulator integrates numerous features to help optimize power management in mobile applications like digital cameras, smartphones, tablets and similar products.

Overview

The LP38690DT-1.8 is a very low-dropout linear regulator that can provide an output voltage of up to 1.8V and a maximum output current of 600mA. The device is designed to help deliver a very low output voltage over a wide load range with excellent load regulation accuracy. It is also designed to ensure that the load is protected from over-voltage, over-temperature and over-current conditions. Additionally, the device features enhanced quiescent current consumption to help maximize the battery life in portable applications.

Key Specifications

• VIN: 2.4 – 5.5V
• VOUT: 0.9V – 1.80V
• Max Output Current: 600mA
• Dropout Voltage: 0.25V @ 5V input and 600mA load
• Line and Load Regulation: 0.1%
• Output Tolerance: ±2%
• Quiescent Current: 5uA
• Enable/Disable Pin: YES
• Temperature Range: -40°C to +85°C

Features

The LP38690DT-1.8 features several features to help optimize power management, including over-current protection, thermal shutdown protection, programmable soft-start and an enable/disable pin. Additionally, the device has an onboard adjustable output voltage divider, which allows for the adjustment of the output voltage with an external resistor. The adjustable voltage divider can help to achieve a higher level of accuracy over a wider range of output voltage settings.

Applications

The LP38690DT-1.8 is designed to provide a high level of accuracy and efficiency in a variety of applications, including digital cameras, gaming consoles, tablets, webcams, and smartphones. Its wide input voltage range, output current, and low-dropout voltage make it well-suited for a number of mobile applications. Additionally, the device\'s wide temperature range and over-temperature protection make it suitable for automotive applications.

Working Principle

The LP38690DT-1.8 works by taking the input voltage and amplifying it to the desired output voltage. This is done by means of a series of transistors and resistors, whichlower the voltage in a linear manner and provide efficient regulation of the output voltage. The device can adjust the output voltage with the help of the adjustable voltage divider, which is controlled by a single external resistor. This divider can help to achieve a higher level of accuracy over a wide range of output voltage settings.

The device also features a number of other features to help reduce power consumption and protect the load from over-voltage, over-temperature and over-current conditions. This includes an enable/disable pin, adjustable soft-start, as well as over-temperature and over-current protection.

Conclusion

The LP38690DT-1.8 is an efficient, low-dropout linear voltage regulator that can provide excellent regulation of up to 600mA of current at up to 1.8V of output voltage. It is designed to be used in a wide range of applications, including digital cameras, gaming consoles, tablets, webcams, and smartphones. Additionally, it features an adjustable voltage divider and other features to help reduce power consumption and protect the load from over-voltage, over-temperature and over-current conditions. All of these features make the LP38690DT-1.8 an excellent choice for many power management applications.

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