ISL9011AIRKJZ

Current - Output:	150mA, 300mA
Base Part Number:	ISL9011A
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature, Soft Start, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	--
Current - Supply (Max):	60µA
Current - Quiescent (Iq):	40µA
Series:	--
Voltage Dropout (Max):	0.2V @ 150mA, 0.4V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.85V, 2.8V
Voltage - Input (Max):	6.5V
Number of Regulators:	2
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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Introduction

The ISL9011AIRKJZ is a high-efficiency, low-power linear voltage regulator from Intersil Corporation. The device is a single-output, wide-range programmable voltage regulator that integrates advanced features and performance benefits. It is designed to provide an adjustable output voltage from 0.3V to 5.5V with a precise accuracy of ±1%. The input voltage range is from 2.5V to 5.5V and can accommodate an output load current up to 1A.In addition to providing excellent line and load regulation, the ISL9011AIRKJZ has several other features including adjustable current limit, thermal shutdown, output over-voltage protection, and extended headroom operation which make it suitable for multiple applications. This device also includes a power-on reset (POR) which can be used to reset the output voltage during power-up, and a low shutdown current.

Application Field

The ISL9011AIRKJZ is ideal for low-voltage, low-power applications such as wireless LAN, disk drives, digital cameras and battery-powered devices. It is also suitable for embedded and computing applications. In addition, the device can be used in DC/DC converters and power supplies. Given its wide input voltage range and adjustable output voltage, it is an ideal regulator for 5V to 1V conversion, and 5V to 3.3V conversion applications.The ISL9011AIRKJZ is available in two package options: a Space-Efficient VQFN package (24-pin) and a Through-Hole DIP package (20-pin). The device is also qualified for the automotive temperature range (-40°C to 125°C), and is suitable for automotive applications such as instrument clusters, infotainment systems and ADAS applications.

Working Principle

The ISL9011AIRKJZ is a linear regulator which works on the principle of pass-transistor based voltage regulation. It consists of four major components, the input voltage, the reference voltage, the error amplifier, and the output transistor. The input voltage is regulated by a pass-transistor, with the reference voltage providing the necessary feedback to regulate the output voltage to the desired voltage level. The error amplifier monitors the output voltage and compares it to the reference voltage. If the output voltage is lower than the reference voltage, then the error amplifier increases the pass transistor’s gate voltage, which increases the transistor’s current and therefore increases the output voltage. If the output voltage is higher than the reference voltage, then the error amplifier decreases the pass transistor’s gate voltage and decreases the output voltage.In addition to the pass-transistor based voltage regulation, the ISL9011AIRKJZ also includes a current limiting feature which is enabled by an internal current sensing circuit. This feature limits the output current, protecting the regulator from overloading. Over-voltage and thermal protection are also provided by the device, helping to ensure that the output voltage remains within safe limits.

Conclusion

The ISL9011AIRKJZ is a high-efficiency, low-power linear voltage regulator designed to provide an adjustable output voltage from 0.3V to 5.5V with a precision accuracy of ±1%. It is an ideal device for low-voltage, low-power applications such as wireless LAN, disk drives, digital cameras, battery-powered devices and embedded computing applications. The device is also available in two package options and is qualified for the automotive temperature range (-40°C to 125°C). It works on the principle of pass-transistor based voltage regulation and provides features such as current limit, thermal shutdown, and output over-voltage protection.

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