UA78L05ACLPE3

Voltage Dropout (Max):	1.7V @ 40mA
Base Part Number:	UA78L05A
Supplier Device Package:	TO-92-3
Package / Case:	TO-226-3, TO-92-3 (TO-226AA)
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Short Circuit
Control Features:	--
PSRR:	49dB (120Hz)
Current - Output:	100mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Bulk

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Introduction

The UA78L05ACLPE3 is a low power consumption and miniaturized Voltage Regulator System-on-Chip (VRSoc), targeted for applications such as portable medical devices, consumer electronics, wearables and industrial control systems. It features a low quiescent current and output voltage accuracy of ±2.5%.

Application Field

The UA78L05ACLPE3 consists of an error amplifier, bandgap voltage reference, current source, and an ON/OFF control block. This makes it suitable for a wide range of applications, such as portable medical devices, consumer electronics, wearables, and industrial control systems.The low quiescent current (500µA typical) of the UA78L05ACLPE3 allows it to be used in low power applications. Furthermore, it features a wide supply voltage range of 3-18V and output voltage accuracy of ±2.5%. This makes it suitable for a variety of applications demanding low output voltage accuracy, including microprocessors and other low-voltage integrated circuits.

Features

The UA78L05ACLPE3 features a wide range of additional features, including:- Under voltage lockout (UVLO)- Floating channel for high voltage- Wide voltage range (3-18V)- On-chip thermal regulation- Low quiescent current (500µA typical)- Output voltage accuracy of ±2.5%All these features make the UA78L05ACLPE3 an excellent choice for applications requiring a low power consumption, miniaturized and accurate voltage regulator.

Working Principle

The UA78L05ACLPE3 consists of an error amplifier that compares the output voltage of the regulator with a reference voltage and then amplifies the difference between them. This error amplifier also provides the basic control and feedback loop of the regulator.The bandgap voltage reference produces a stable reference voltage and is used to set the output voltage level. This reference voltage is always maintained, even in the presence of varying input voltages and load conditions.The current source controls the output current of the regulator for a given input voltage and load conditions. It also helps prevent excessive output current from the regulator.The ON/OFF control block is responsible for switching the regulator on and off. This block is controlled by an external signal or pin, allowing the user to turn the regulator off when not in use.

Conclusion

The UA78L05ACLPE3 is a low power and miniaturized Voltage Regulator System-on-Chip, designed for a wide range of applications such as portable medical devices, consumer electronics, wearables, and industrial control systems. Its features include a low quiescent current of 500µA, a wide supply voltage range of 3-18V and an output voltage accuracy of ±2.5%. The basic control and feedback loop of the regulator are provided by its error amplifier and the bandgap voltage reference provides a stable reference voltage. The current source controls the output current of the regulator, while the ON/OFF control block allows the user to switch the regulator on and off. These features make the UA78L05ACLPE3 an excellent choice for applications requiring a low power consumption and accurate voltage regulator.

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