AP1117K15L-U

Current - Output:	1A
Base Part Number:	AP1117
Supplier Device Package:	TO-263-2
Package / Case:	TO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	60dB (180Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.4V @ 1A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.5V
Voltage - Input (Max):	18V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction to AP1117K15L-U

The AP1117K15L-U is a low-dropout linear voltage regulator (LDO) that is available in a SOT-223 four lead package. It provides high accuracy voltage regulation supply with a wide input voltage range of 4.95V to 40V and an output voltage up to 15V. It is ideal for applications requiring a low quiescent current such as SMPS post regulator, back-up supervisor circuit, and battery-powered applications.

Application Field

The AP1117K15L-U is commonly used in a variety of digital and analog power supply applications, such as microprocessors, battery-powered equipment, embedded control systems, WDM/Digital signal processing, etc. It is also used for further applications such as LCD TVs, audio equipment, automotive electronics, and other consumer appliances.

Features of AP1117K15L-U

Some of the features of the AP1117K15L-U include a low input-output differential voltage that ranges from 178mV to 100mV, a maximum output current of up to 1.5A, a wide operating temperature range from −40°C to 125°C, a quick transient response, and an internal short-circuit current limit. It also offers several advantages such as over-current protection, over-temperature shut-down and reverse current protection.

Working Principle of AP1117K15L-U

The AP1117K15L-U uses a two stage design consisting of an amplifier and a feedback voltage divider. The error amplifier will control the output voltage by providing or withdrawing current from the output, while the feedback voltage divider provides the reference voltage for the error amplifier.When the input voltage rises above the output voltage, the voltage across the amplifier is reduced and it begins to provide more current to the output. However, the amplifier keeps increasing the current until the output voltage reaches the predetermined voltage. Once the output voltage reaches the predetermined voltage, the voltage across the voltage divider will increase, and the error amplifier will reduce the current, thus maintaining the output voltage.

Conclusion

The AP1117K15L-U is a linear voltage regulator (LDO) that provides high accuracy voltage regulation supply with a wide input voltage range and an output voltage up to 15V. It is commonly used in a variety of digital and analog power supply applications such as microprocessors, battery-powered equipment, embedded control systems, WDM/Digital signal processing, etc. It has features such as a low input-output differential voltage, a maximum output current of up to 1.5A, a wide operating temperature range from −40°C to 125°C, a quick transient response, and an internal short-circuit current limit. The working principle of the AP1117K15L-U is based on a two stage design consisting of an amplifier and a feedback voltage divider.

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