NCP629FC28T2G

Current - Output:	150mA
Base Part Number:	NCP629
Supplier Device Package:	5-FlipChip
Package / Case:	5-UFBGA, FCBGA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	62dB ~ 38dB (120Hz ~ 10kHz)
Current - Quiescent (Iq):	175µA
Series:	--
Voltage Dropout (Max):	0.125V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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NCP629FC28T2G Application Field and Working Principle

NCP629FC28T2G is a low-dropout (LDO) linear voltage regulator that provides a constant output voltage of up to 2.8V. It is housed in a small and thin 8-lead TmePak package, making it well-suited for applications that require a space-efficient design. This miniature device contains a low-noise voltage reference, an advanced low-noise controller, an output stage, a reverse current protection circuit and a high-current power MOSFET. These features enable NCP629FC28T2G to offer an ultra-low dropout voltage of only 80mV, at an output current of up to 500mA, making it ideal for automotive and industrial applications. Additionally, its wide input voltage range of 4.0V to 18V makes it suitable for a variety of battery and power supply systems.

Applications

NCP629FC28T2G is typically used in power supply systems, automotive electronics, industrial control, medical electronics, communication systems, consumer electronics and notebook computers. It can provide constant output voltage of up to 2.8V, supporting various system designs with maximum output current of 500mA.

Working Principle

The NCP629FC28T2G is a linear voltage regulator with low-dropout technology. It works on the principle of supplying a constant output voltage to the load, even when the input voltage varies. The device comprises a low-noise voltage reference, an advanced low-noise controller, an output stage, a reverse current protection circuit and a high-current power MOSFET. The reference voltage is compared with the output via the amplifier, controlling the gate voltage of the MOSFET. The MOSFET then passes the input current to the output, maintaining a constant output voltage. During this process, a low voltage drop of ≈80mV is achieved at a maximum output current of 500mA, allowing this device to be used in power supply systems that must operate with limited input/output voltage difference. The reverse current protection circuit prevents the output from generating a negative voltage, which can damage the load or the device itself, if a short circuit were to occur. This feature also guarantees a secure start-up of the system, protecting it from external power supply defects. An additional feature of the NCP629FC28T2G is its temperature-compensated design. This ensures that the output voltage is stable and any fluctuations due to internal temperature change are minimized. Besides these features, the NCP629FC28T2G also contains a 100 µA current limit circuit, providing transient protection when a large current surge is encountered. The device also incorporates current-sense compensation technology, which in non-precision applications, compensates for the change in the output voltage when a load is added or removed. This improves the overall accuracy and reduces the time taken to recharge or charge the system capacitors. Overall, the NCP629FC28T2G is a versatile and powerful linear voltage regulator that offers a wide variety of features and benefits, making it an ideal choice for automotive and industrial applications.

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