L4931CD33-TRY Integrated Circuits (ICs)

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Abstract:This paper introduces the application field and working principle of L4931CD33-TRY PMIC (Power Management IC) – Voltage Regulators – Linear. The paper explains the key features of the product, the design of the product, and its application. The paper also provides information about the solution for this product and the documents required for getting started with the product.

Introduction:The L4931CD33-TRY PMIC - Voltage Regulators - Linear is a power management IC (PMIC) chip developed by STMicroelectronics. It is a 3A low dropout (LDO) linear regulator that features an input voltage range of up to 42V and a factory-programmed output voltage range starting from 1.8V, with a maximum of 5V output voltage. It offers a wide range of features, such as built-in thermal and short-circuit protection, programmable hysteresis, delay on enable, and an adjustable over-current protection mode, to provide a dependable and efficient power supply solution for various applications.

Key features:The key features of the L4931CD33-TRY PMIC - Voltage Regulators - Linear are mentioned below:

• It has an input voltage range of up to 42V.
• It has a factory-programmed output voltage range from 1.8V to 5V, with a maximum output current of 3A.
• It offers built-in thermal, short circuit, and over-current protection.
• It has a programmable hysteresis, delay on enable, and adjustable over-current protection option.
• It has an operating temperature range of -40°C to +125°C.
• It is Pb-free and RoHS compliant.

Design:The L4931CD33-TRY PMIC - Voltage Regulators - Linear consists of a high current PNP power transistor, shunt resistors, over-current protection circuitry, and band-gap reference. The IC includes a built-in thermal protection mechanism, which is activated when the die temperature rises above a certain threshold. The IC also includes a series of adjustable hysteresis, delay on enable, and adjustable over-current protection features, to provide an efficient and robust power supply solution.

Applications:The L4931CD33-TRY PMIC - Voltage Regulators - Linear is designed for use in automotive, industrial, telecommunication, and portable power applications. It is suitable for a wide range of applications, such as DC/DC converters, automotive electronic power systems, LED lighting, and smart power ICs. It is also suitable for applications that require a precise output voltage with stable and current-limited load lines.

Working Principle:The L4931CD33-TRY PMIC - Voltage Regulators - Linear works on the linear regulation principle. The IC includes a High Current PNP Power Transistor, which is connected in series with the input voltage; this creates a voltage drop between the input and output pins. The voltage drop is converted into a current, which is then passed through an adjustable band-gap reference, which provides a precise output voltage. The reference voltage is then fed back to the shunt resistor, which sets the current limit. If the current limit is exceeded, the IC will shut down to prevent any damage.

Advantages:The L4931CD33-TRY PMIC - Voltage Regulators - Linear offers a wide range of advantages, such as a wide input voltage range of up to 42V, a wide output voltage range from 1.8V to 5V, and a maximum output current of 3A. It also offers built-in thermal, short circuit, and over-current protection. Furthermore, it has a programmable hysteresis, delay on enable, and adjustable over-current protection option.

Solution:The L4931CD33-TRY PMIC - Voltage Regulators - Linear is an ideal solution for various applications, such as DC/DC converters, automotive electronic power systems, LED lighting, and smart power ICs. It provides a dependable and efficient power supply solution, with a wide input voltage range, and a wide output voltage range. Furthermore, it has built-in thermal, short circuit, and over-current protection features, and a programmable hysteresis, delay on enable, and adjustable over-current protection option.

Getting Started:To get started with the L4931CD33-TRY PMIC - Voltage Regulators - Linear, the following documents are required:

• Product Datasheet
• Application Notes
• Reference Design
• Software & Firmware
• Schematic & PCB Layout Diagrams

Conclusion:The L4931CD33-TRY PMIC - Voltage Regulators - Linear is a versatile power management IC, designed to provide a dependable and efficient power supply solution for various applications. It offers a wide input voltage range of up to 42V and a wide output voltage range starting from 1.8V, with a maximum of 5V output voltage. It also has built-in thermal, short circuit, and over-current protection, and a programmable hysteresis, delay on enable, and adjustable over-current protection feature. Lastly, it has an operating temperature range of -40°C to +125°C, and is Pb-free and RoHS compliant.

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