ISL9012IRKJZ

Current - Output:	150mA, 300mA
Base Part Number:	ISL9012
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Part Status:	Obsolete
Packaging:	Tube

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Introduction

The ISL9012IRKJZ is a linear voltage regulator designed for precise voltage control in power management applications. It is capable of generating precise output voltages from 0.5V to 5.5V, with a maximum output current of 1.5mA. In addition, it features an adjustable output voltage, low-power operation, and adjustable over-voltage protection. In this article, we will discuss the application field and working principle of the ISL9012IRKJZ voltage regulator.

Application Field

The ISL9012IRKJZ voltage regulator is designed for precision voltage control in power management applications. It is ideal for use in power supply systems for processor-based systems, such as microcontrollers, digital signal processors, and other embedded electronic systems. Additionally, it is widely used in portable electronic devices, such as mobile phones, digital cameras, and other devices.The device features programmable current limit, over-voltage protection, and fast turn-on/turn-off response time. It is designed for wide-reach applications, as it supports multiple input voltage sources, including 3V, 5V, and 15V. Moreover, the device is capable of providing very low dropout of only 150mV at 5.5V output.The ISL9012IRKJZ is also well suited for use in automotive applications. It is capable of operating over the typical automotive temperature range of -40°C to +125°C. In addition, it meets the automotive quality requirements, including the AEC-Q100, and has been tested at high temperature and ripple voltages.

Working Principle

The ISL9012IRKJZ voltage regulator includes a low-dropout (LDO) linear regulator, a bandgap reference circuit, an error amplifier, a current comparator, and an over-voltage protection circuit.The LDO linear regulator is designed to convert a higher input voltage (Vin) to a lower output voltage (Vout) by passing a current through an external resistor. The output voltage is controlled by the input voltage, the current passing through the resistor, and the voltage drop across the resistor. The output voltage is then regulated by the error amplifier, which compares the output voltage to a reference voltage and adjusts the current through the external resistor to match the reference voltage.The over-voltage protection circuit is used to protect the device from excessive voltage levels. It is an open-drain circuit with an external resistor, which limits the output current and reduces the output voltage when the input voltage exceeds a certain threshold.The ISL9012IRKJZ is also capable of providing very low minimum dropout, which is the minimum voltage difference between the input and output voltage. The low drop-out voltage improves the power efficiency and enables the device to meet the tight voltage accuracy requirements.

Conclusion

The ISL9012IRKJZ voltage regulator is a precision voltage regulator designed for high accuracy and low-power operation in compact, system power management applications. It is capable of providing a wide range of output voltages with very low drop-out voltage and fast turn-on/turn-off response time. Additionally, it is suitable for use in automotive applications and can operate over wide temperature ranges. Its low-drop-out linear regulator, bandgap reference circuit, error amplifier, current comparator, and over-voltage protection circuit make it ideal for power management applications.

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