ZLDO1117K18TC Integrated Circuits (ICs)

Current - Output:	1A
Base Part Number:	ZLDO1117
Supplier Device Package:	TO-252-3
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	80dB (120Hz)
Current - Supply (Max):	10mA
Current - Quiescent (Iq):	120µA
Series:	--
Voltage Dropout (Max):	1.35V @ 1A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	18V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

PMIC - Voltage Regulators - Linear is the technology that provides a regulated output voltage with a low output impedance. This type of regulation is useful in certain applications such as off-chip regulation, power management microcontrollers and embedded system power regulation. The ZLDO1117K18TC is a linear voltage regulator designed to deliver a regulated voltage output under a variety of loads and operating conditions. Some of its features and applications are discussed in this article.

Features of the ZLDO1117K18TC

The ZLDO1117K18TC is a low-dropout linear regulator which can deliver a regulated voltage from 1.2V to 3.5V, with a maximum output current of 1.3A. It has an input voltage range from 3V to 10V and is capable of supplying high-current output over a wide range of input voltages. The regulator has an ultra-low dropout voltage of as low as 50mV, which makes it suitable for use in low-noise and low-power applications. The device also has a low quiescent current of only 1 mA, which makes it an ideal choice for battery-powered applications. The ZLDO1117K18TC also offers a very fast transient response of 1us and an excellent load regulation over full load.

Using an External Capacitor

The ZLDO1117K18TC is designed to be used with an external bypass capacitor. This can help to improve the device’s performance in certain applications. The capacitor should be connected as shown in the diagram below. It should be placed as close to the device as possible, and should be of a type and value which is suitable for the application.

Input and Output Voltages

When the ZLDO1117K18TC is used, the input voltage must be between 3V and 10V, while the output voltage must be between 1.2V and 3.5V. These are typical specifications, and the device may be able to operate outside of these ranges, but this depends on the application and should be tested before use.

Thermal Protection

The ZLDO1117K18TC has built-in thermal protection, which allows it to keep running in the event of an over-temperature condition. This feature can help to ensure that the device does not fail in extreme conditions. The thermal protection will shut down the device if the temperature exceeds 150˚c. When the temperature drops, the device will restart automatically.

Conclusion

The ZLDO1117K18TC is a low-dropout linear regulator which can offer a regulated voltage output with a maximum output current of 1.3A. It is suitable for use in low-noise and low-power applications, as well as battery-powered applications. The device has an ultra-low dropout voltage and a low quiescent current. It also has a fast transient response, excellent load regulation and built-in thermal protection. The device must be used in conjunction with an external bypass capacitor, and the input and output voltages should be within the recommended ranges.

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