NCP161AFCT180T2G

Voltage Dropout (Max):	0.45V @ 450mA
Supplier Device Package:	4-WLCSP (0.64x0.64)
Package / Case:	4-XFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Soft Start
Control Features:	Enable
PSRR:	91dB ~ 48dB (100Hz ~ 100kHz)
Current - Quiescent (Iq):	23µA
Current - Output:	450mA
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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NC161AFCT180T2G application field and working principle

NCP161AFCT180T2G is a LOW DROPOUT (LDO) linear regulator, which belongs to On Semiconductor’s line of PMIC - Voltage Regulators - Linear. It is integrated with a PNP transistor which could easily eliminate the need to externally drive the pass element while providing excellent AC and DC characteristics.

Features

NCP161AFCT180T2G is capable of providing up to 180mA output current and an adjustable output voltage up to 24V, making it one of the most robust devices in its family. Some of its features include:
• Low voltage operation
• High ripple rejection
• Adjustable output voltage up to 24V
• 180mA output current
• Over temperature and output over current protection
• Low quiescent current
• Short circuit protection

Applications

NCP161AFCT180T2G is an ideal device for many different applications due to its combination of performance and features. Some of these include:
• Automotive systems
• Industrial systems
• PDA and tablet PCs
• PCs and laptops
• Portable digital audio players
• Power management systems
• Telecommunication systems

Working Principle

The NCP161AFCT180T2G is comprised of two main elements — a PNP transistor that eliminates the need for an external pass element and a precision bandgap reference. It operates by sensing any changes in the input voltage and adjusting its output voltage automatically to maintain a constant output. When the input voltage drops below the output voltage, the PNP transistor will be turned on and the output voltage will be lowered. This lowers the voltage drop across the PNP transistor allowing more current to flow from the input to the output. As more current is passed from the input to the output, the output voltage is restored to its original setting. Similarly, when the input voltage rises more than the output voltage, the PNP transistor will be turned off and the output voltage will be raised.Furthermore, the NCP161AFCT180T2G also provides short-circuit and over-temperature protection. The short-circuit protection circuit will sense when the output current is greater than the predetermined threshold and will reduce the current flow to protect the device. The over-temperature protection will reduce the output current when the device temperature reaches a certain level, protecting the device from any thermal damage.

Conclusion

The NCP161AFCT180T2G is one of On Semiconductor’s PMIC - Voltage Regulators - Linear and is designed to provide up to 180mA output current and adjustable output voltage up to 24V. It features excellent AC and DC characteristics, low voltage operation, high ripple rejection, over temperature and output over current protection and low quiescent current. It’s ideal for many different applications such as automotive systems, industrial systems and power management systems, due to its combination of performance and features. It operates by sensing any changes in the input voltage and adjusting its output voltage automatically to maintain a constant output with the aid of a PNP transistor and a precision bandgap reference.

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