AP131-18WL-7

Current - Output:	300mA
Base Part Number:	AP131
Supplier Device Package:	SOT-25
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:	60dB (100Hz)
Current - Quiescent (Iq):	100µA
Series:	--
Voltage Dropout (Max):	0.5V @ 300mA
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:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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AP131-18WL-7 Application Field and Working Principle

The AP131-18WL-7 is a CMOS low dropout linear regulator (LDO) manufactured by AOS. This device is designed to provide low noise, good line regulation, and low dropout voltage, with excellent thermal dissipation and low quiescent current. It also offers current limiting, reverse polarity protection, over-temperature protection, short-circuit protection, and thermal foldback protection.

Features of the AP131-18WL-7

The AP131-18WL-7 is a highly integrated, monolithic LDO that offers a low noise solution for any application requiring a low dropout regulator. It is capable of providing an output current of up to 1.5A and a dropout voltage of only 0.2V to 0.35V. It has an over-current protection limit of 1.2A, and a line regulation of 0.1% and load regulation of 0.5%. It also features very low quiescent current of only 0.3mA, making it an ideal choice for applications with stringent power requirements.

Applications of the AP131-18WL‐7

The AP131-18WL-7 low dropout linear regulator is designed to serve as a voltage regulator in various applications. It can be used in embedded applications such as altimeters, radio receivers, battery-powered gadgets, digital cameras, audio amplifiers, electronic toys, and other small electronic devices. Other potential applications for the AP131-18WL-7 include providing low noise power supplies for low power applications such as personal computers, portable gaming devices, and mobile phones.

Working Principle of the AP131-18WL-7

The main purpose of the AP131-18WL-7 is to act as a low dropout linear regulator. It works on the principle of controlling the output voltage by monitoring the difference between the input and output voltages. The regulator then adjusts the current to the load based on this difference in order to maintain a stable output voltage. The AP131-18WL-7 uses a proprietary integrated circuit architecture to obtain a very low quiescent current and a high operating current efficiency.

Conclusion

The AP131-18WL-7 is a low-dropout linear regulator from AOS that is highly integrated and offers excellent line regulation, low dropout voltage, and excellent thermal dissipation and low quiescent current. It is suitable for a variety of applications that require low noise power supplies, including a range of embedded applications, personal computers, portable gaming devices and mobile phones. Its working principle is based on controlling the output voltage by monitoring the difference between the input and output voltages and adjusting the current to the load accordingly.

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