SIL4949E Voltage Regulator Overview
The SIL4949E is a multifunction voltage regulator designed specifically for microcomputer-controlled systems, notably in the automotive sector. Its most outstanding characteristic is its very low dropout voltage, making it ideal for applications that require a stable 5V supply with minimal power loss.
Key Features
Some salient features of this voltage regulator include:
- A versatile operating DC supply voltage range of 5V to 28V, with transient supply voltage capabilities up to 40V.
- Exceptionally low quiescent current in standby mode, enhancing energy efficiency.
- High precision in the standby output voltage, which is regulated to a tight 5V ±1% range.
- The regulator has an output current capability of up to 100mA.
- Very low dropout voltage of less than 0.5V, which results in reduced power dissipation.
- Incorporated reset circuit that monitors the output voltage.
- Programmable reset pulse delay facilitated through an external capacitor.
- Voltage sense comparator to ensure the stability and reliability of the output.
- Integrated thermal shutdown and short circuit protection to safeguard against overheating and circuit damage.
Product Variants and Packaging
The L4949E comes in different packages, specifically the SO-8 and SO-20W formats. It is available in either tube form or tape and reel for use in automated production environments, indicated by order codes L4949ED, L4949ED013TR for the SO-8, and L4949EP, L4949EP013TR for the SO-20W packaging.
Application and Benefits
This highly efficient regulator can support transient supply voltage applications, and with its multifunction capabilities, it stands as a crucial component in enhancing the performance and reliability of sophisticated automotive electronics. Its added functions such as power-on reset and input voltage sensing further round out its extensive utility.
Product Documentation and Support
Further details on applications, block diagram configurations, pin descriptions, and absolute maximum ratings including thermal and electrical characteristics can be found within the document. Additionally, ECOPACK® compliant packaging information and revision history are included to comply with environmental standards and provide historical product evolution context.
Conclusion
The SIL4949E datasheet provides essential information concerning this very low drop voltage regulator, its application, and its features designed to meet the needs of power-sensitive automotive electronics. It emphasizes its high precision, efficiency, and protection mechanisms that ensure stable and reliable operation in varying conditions.
Doc ID 4275 Rev 6 from November 2009, extends extensive insights into this product, which can be found on pages 1 and 2 of the 19-page datasheet document.
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