NJU7775F33-TE1 Integrated Circuits (ICs)

Voltage Dropout (Max):	0.25V @ 100mA
Supplier Device Package:	SOT-23-5 (MTP5)
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	65dB (1kHz)
Current - Quiescent (Iq):	35µA
Current - Output:	150mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	9V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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NJU7775F33-TE1 Application Field and Working Principle

NJU7775F33-TE1 is a linear voltage regulator and an important component of the power management IC (PMIC) category. It is capable of providing current up to 500 mA and voltage up to 44 V. Its brushless DC motor application field can be used in various electronic devices such as PCs, digital cameras, DVD players, smart phones, etc.The main purpose of NJU7775F33-TE1 is to provide steady and precise voltage to the components of the circuit, which will help the circuit obtain more accurate signals for further operations. It uses the voltage feedback mechanism, where the voltage is monitored in real time and then adjusted according to the reference voltage. That’s why it has excellent ripple rejection capability and is suitable for use in high ripple noise environment.NJU7775F33-TE1 is a low ripple, low voltage dropout and high efficiency regulator. Although it is designed for 3.3V output, the output voltage can be adjusted within the range from 0.8V to 4.5V. In correlation, NJU7775F33-TE1 is ideal for applications where high precision control is required such as different receivers, air/ground vehicle system, and telecommunication. Moreover, the NJU7775F33-TE1 is a low quiescent current regulator and it can support up to 500mA output current.To further discuss the technicalities of the NJU7775F33-TE1, we will look at its structure and the working principle of linear voltage regulator. Structurally, it is composed of three stages, namely the error amplifier, the driver and the pass elements. The error amplifier is composed of two transistors and one diode, with an input that varies with the output voltage, as per voltage control principle. The driver stage brings the signal from the error amplifier to the last stage and driving it out to the load. The pass element can be either a transistor or a MOSFET (Metal-Oxide Semiconductor Field-Effect Transistor) depending on based type. The transistor type is PNP or NPN and the MOSFET type is either a NMOS or PMOS.Now on to the working principle. First, the error amplifier samples the output voltage, compares that to a reference voltage generated internally and output a signal varies with the differences. The signal from the error amplifier then gets into the driver stage, which amplifies it. Lastly, the amplified signal is then fed to the pass element, which in response opens or closes depending on the signal. This process is continuously repeated in order to compensate for a drop in output voltage, due to an increase in its output load. This will result in a regulation of the output voltage in order to maintain a steady and precise output.The NJU7775F33-TE1 is an extremely powerful and efficient voltage regulator, with a low quiescent current and high output current up to 500mA. It is ideal to be used in 3.3V application, or any other application that require a stable and precise power supply.

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