LDK120M31R

Current - Output:	200mA
Base Part Number:	LDK120
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	55dB (120Hz ~ 10kHz)
Current - Supply (Max):	100µA
Current - Quiescent (Iq):	60µA
Series:	--
Voltage Dropout (Max):	0.3V @ 200mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.1V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LDK120M31R Application Field and Working Principle

PMIC - Voltage Regulators - Linear \The LDK120M31R is a linear voltage regulator integrated circuit specifically designed for PMIC (Power Management IC) applications. Manufactured by Magnachip, this IC is a low-dropout three-terminal regulator that offers a fixed 5.0V output voltage at 1.2A output current rating.

Features

This IC is designed with a wide range of features such as wide input voltage range (2.8V to 35V), low quiescent current (3mV output), and current limit protection. It also has an enable/disable pin which makes it suitable for low power applications. Additionally, the device is offered in the SOT-223 package, making it ideal for compact designs.

Applications

This IC is ideal for industrial and telecom applications that require a simple and cost-effective voltage regulator. It can be used in a wide range of applications such as embedded systems, power distribution, battery-powered devices, communication equipment, computer products and automotive electronics.

Working Principle

The LDK120M31R utilizes a simplified control circuit to regulate the output voltage. The resistor divider, connected between the output and the regulation buffer, sets the reference voltage for the regulation section. The regulation section compares the reference voltage to the feedback voltage on the output pin and adjusts the voltage output accordingly. To optimize your design, the connection of the resistor divider should be adjusted depending on the output voltage and the current load.The LDK120M31R has a built-in current limiter that protects the device from excessive output current in the event of a fault. The current limit threshold is set by the resistor between the Current/On/Off pin and ground.

Conclusion

The LDK120M31R is a versatile, cost-effective and easy-to-use linear voltage regulator. Its wide range of features makes it ideal for a variety of PMIC applications. It has a wide input voltage range and current limit protection, making it suitable for high performance embedded systems. Its simple working principle makes it easy to configure for many applications.

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