TLE4274D V33

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The TLE4274D V33 is a low drop Voltage Regulator (LDO) integrated circuit that is designed for applications like supplying digital logic and operational amplifiers. It has low quiescent current and high output voltage accuracy, and operate from battery and AC sources. This part is part of the TLE4274 Series of LDO Voltage Regulators from Infineon.

This LDO Voltage Regulator is a three-terminal device that is comprised of many blocks that are designed to provide a high precision, low-noise Voltage Regulator (VR) output. The key blocks are the reference, error amplifier, on/off control, output voltage regulation and loop compensation. Regulation is achieved by controlling the output voltage with the output voltage feedback.

The main application fields of TLE4274D V33 are:

• Battery-driven equipment, e.g. notebook PCs
• Digital systems
• Industrial control
• Power management
• Systems with fixed voltage regulation

TLE4274D V33 working principle is as below:

The device is powered from a battery or an external power source. The input voltage is monitored and regulated by a comparator that compares the input voltage to an internal reference to maintain a constant output voltage. The error amplifier, which is connected to the output voltage feedback, provides the gain and distortion reduction needed to ensure stability and low-noise operation. The loop compensation helps to ensure accurate regulation and stability of the output voltage. The error amplifier also drives the on/off control. Once the voltage on the output of the error amplifier reaches the predetermined level, the on/off control is enabled, which results in the output voltage being regulated at the predetermined output voltage level. The output voltage can be adjusted externally by the use of a voltage divider.

The TLE4274D V33 is designed to have high power efficiency. It has a low standby current and a shutdown current that is less than 2 microamperes. The on-chip thermal protection circuit protects the IC from questionable thermal conditions. It has a low dropout voltage, which is 1V at 200mA output current, and the dropout voltage increases only slightly with increased load currents up to the rated maximum load current.

In addition, the TLE4274D V33 features an internal power-down mode which is useful for systems with service interruptions. The power down mode reduces the quiescent current by almost 99% compared to the working mode, eliminating unnecessary power consumption. The TLE4274D V33 also has an adjustable output voltage function, allowing the user to modify the output voltage level to suit the application needs.

The TLE4274D V33 is an advanced low-power Voltage Regulator that provides improved power efficiency, accuracy and reliability. Its low dropout voltage, adjustable output voltage and low quiescent current make it suitable for a wide range of applications.

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