NX1117CE19Z,115 Integrated Circuits (ICs)

Current - Output:	1A
Base Part Number:	NX1117CE
Supplier Device Package:	SOT-223
Package / Case:	TO-261-4, TO-261AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	67dB (120Hz)
Current - Quiescent (Iq):	6mA
Series:	--
Voltage Dropout (Max):	1.2V @ 800mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.9V
Voltage - Input (Max):	20V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

NX1117CE19Z is a three-terminal low dropout (LDO) regulator from Nexperia. This is a voltage regulator from the PMIC – Voltage Regulators – Linear category. It is an excellent device for applications that demand tight regulation of the output voltage over a range of ambient temperatures and line voltages.

Features

NX1117CE19Z is a low dropout (LDO) regulator with a high accuracy of +-2.0%. It is available in SOT23-3, SOT223 and TO-252 packages. It has an input voltage range of 2.0V-11.0V, while its output voltage range is 1.2V-10.2V. The output current of this regulator can be as large as 850mA while operating in the junction temperature range -40°C to +125°C. The NX1117CE19Z also has an ENABLE/SHUTDOWN pin which can be used for powering down the device when no current is required.

Applications

NX1117CE19Z can be used in a variety of applications such as battery powered systems, communications systems, portable electronics, automotive and industrial systems. It is also suitable for applications that require low power consumption due to its low quiescent current of only 10uA. Some examples of applications that can take advantage of this device are cell phones, PDAs, MP3 players, digital still cameras and printing systems.

Working Principle

The NX1117CE19Z works on the principle of a voltage reference circuit and an error amplifier. The voltage reference circuit provides the reference voltage for the output voltage. This reference voltage is configured by a potentiometer connected to ground and the input voltage of the device. The error amplifier senses the difference between the output voltage and the reference voltage, and then adjusts the output voltage to match the reference voltage. The voltage regulation of this device is achieved by the action of a current limit transistor (normally n-channel) connected to the output. When the current through the transistor rises above the specified limit, the transistor opens up, reducing the output voltage of the regulator. This action helps in ensuring that the output voltage remains within the specified range even when the input voltage varies.

Conclusion

NX1117CE19Z is an excellent device for applications that require a tight regulation of the output voltage over a wide range of temperatures and line voltages. Its high accuracy +-2.0% and low quiescent current of 10uA makes it an ideal choice for low power consumption applications. Furthermore, its ENABLE/SHUTDOWN pin makes it easy to power down the device when it is not required. With its wide input voltage range of 2.0V-11.0V and output voltage range of 1.2V-10.2V, it can be used in a variety of applications such as communication systems, portable electronics, automotive, industrial and battery powered systems.

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