LDK130M28RY

Current - Output:	300mA
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	55dB (120Hz ~ 10kHz)
Current - Supply (Max):	120µA
Current - Quiescent (Iq):	60µA
Series:	Automotive, AEC-Q100
Voltage Dropout (Max):	0.4V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.8V
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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Introduction

The LDK130M28RY is a linear voltage regulator, manufactured by Texas Instruments, which provides a fixed output voltage of 3.3V and drives an output current of up to 2A (depending on the package variant). It is one of TI\'s most power efficient, high current voltage regulators, with a typical quiescent current of less than 25 μA, making it an ideal choice for portable and battery-powered applications. This product is available in a standard 5-PIN SOT-223 package and is also offered in an ultra-small 3-PIN SOT-563 package to reduce board space as much as possible.

Application Field

The LDK130M28RY has a wide range of application fields, ranging from mobile and handheld device like DVD players, set-top boxes, global navigation systems, digital still cameras and laptop computers to tablets, e-book readers, and 3D glasses. Its low dropout voltage and quiescent current make it the ideal solution for power-sensitive applications, while the high output current ensure that it can support even the most intensive loads with ease. In addition, this device provides integrated protection features such as over-temperature protection, current-limit protection, soft-start and under-voltage lockout.

Working Principle

The LDK130M28RY utilizes a three-terminal linear voltage regulator principle to provide a stable 3.3V output from an input range of 3.0V to 8.0V. It consists of an error amplifier, a compensation network, a current limit circuit, an under-voltage lockout circuit, an over-temperature protection circuit and a pass transistor.The error amplifier compares the voltage of the output node to the reference voltage and generates an error signal. The compensation network consisting of Resistors and/or Capacitors will then modify the error signal and provide the amplified signal to the pass transistor. The pass transistor then passes the regulated current to the output while current limit circuit prevents the output current from exceeding the specified limit. Under-voltage lockout circuit will detect an input voltage below a certain threshold and will shut the pass transistor off. In addition, the over-temperature protection circuit will shut the pass transistor off when the die temperature exceeds the protection threshold.

Conclusion

Overall, the LDK130M28RY is an ideal choice for portable and battery-powered applications because of its low dropout voltage, high output current, and integrated protection features. With its wide range of application fields and excellent thermal performance, this device is sure to satisfy the needs of any system design.

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