LD1086PUR

Voltage Dropout (Max):	1.5V @ 1.5A
Base Part Number:	LD1086
Package / Case:	8-VDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	88dB (120Hz)
Current - Quiescent (Iq):	10mA
Current - Output:	1.5A
Series:	--
Voltage - Output (Max):	28.5V
Voltage - Output (Min/Fixed):	1.25V
Voltage - Input (Max):	30V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LD1086PUR application field and working principle

Introduction

The LD1086PUR is a three-terminal, adjustable (1A) linear voltage regulator with an output current of 1A and an output voltage range of 0.2V - 38V. It is part of the Linear Components family of products concerned with power management, DC/DC converters, voltage regulators and power supplies. The LD1086PUR is designed to provide up to 1A of continuous current to the load, with a typical dropout voltage of 1.75V at 1A and a maximum of 2.5V at 1A.The LD1086PUR is suitable for a wide range of applications, and provides an ideal solution for customers requiring precision regulation in space-constrained or limited temperature applications.

Applications

The LD1086PUR is typically used in applications that require high accuracy in the output voltage such as: • Battery-powered portable and remote control services • Automotive electronics • Data processing systems • Motor controllers • medical devices• Power supplies • Industrial equipment • Portable electronic products In addition, the chip is capable of reducing noise when used in applications that require low-noise operation such as amplifiers and analogue to digital converters.

Pinout

The LD1086PUR features 3 pins in a small SOT-223 package as shown in the pin diagram. Pin 1: GND (Ground): Connects to ground. This pin must be connected in order to establish a voltage reference and must be connected to the ground of the circuit. Pin 2: ADJ (Adjust): The output voltage is the voltage at this pin. Can be used to adjust the output voltage. Pin 3: Vout: Connects to the output voltage of the device. The output voltage varies depending on the voltage at the ADJ pin.

Working Principle

The LD1086PUR is a linear voltage regulator that follows the “three-terminal” voltage regulator topology. In this topology, the device receives a supply voltage at the input pin, regulates it to a preset output voltage, and then provides it to the load.The LD1086PUR features a bandgap reference that is used to set the nominal output voltage. The ADJ pin can be used to adjust the output voltage in positive or negative direction. The reference voltage is divided by a pair of external resistors and compared to a voltage proportional to the output voltage. The voltage difference is used to control a series pass transistor based on the error amplifier.The LD1086PUR also features overload protection, current limiting and thermal protection for maximum reliability and safety.

Conclusion

The LD1086PUR is an adjustable three-terminal linear voltage regulator that provides an output voltage range of 0.2V - 38V with an output current of 1A. It is well-suited for a variety of applications due to its high accuracy, low dropout voltage and noise reduction capabilities. It features an ADJ pin that can be used to adjust the output voltage, as well as overload protection, current limiting and thermal protection.

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