LP2985-29DBVR

Current - Output:	150mA
Base Part Number:	LP2985-29
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, Short Circuit
Control Features:	Enable
PSRR:	45dB (1kHz)
Current - Supply (Max):	2.5mA
Current - Quiescent (Iq):	95µA
Series:	--
Voltage Dropout (Max):	0.58V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.9V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LP2985-29DBVR Application Field and Working Principle

The LP2985-29DBVR is a family of low-dropout (LDO) linear voltage regulators developed by Texas Instruments (TI). It provides very low dropouts and low quiescent current output as well as improved transient response and improved reverse leakage current. Additionally, it supports a wide input voltage range, output voltages of 0.8V to 5.0V, and operating temperature range of -40 °C to +125 °C. This LDO linear voltage regulator can be used in a wide range of applications such as post-regulators for switching supplies, battery supply systems, automotive applications, and portable system power supplies.

LP2985-29DBVR Working Principle

The LP2985-29DBVR uses a standard LDO linear regulator architecture consisting of an adjustable voltage reference, an error amplifier, a series pass transistor, and a feedback loop. The voltage reference provides the voltage reference against which the error amplifier compares the output voltage. The error amplifier is then responsible for driving the series pass transistor as its output voltage moves away from the voltage reference. This series pass transistor is usually a power MOSFET which controls the power transfer from the input to the output. The LP2985-29DBVR Series regulates the output voltage across its feedback network and the voltage reference input is set to maintain the output voltage at the desired voltage level. This type of regulator does not maintain the output voltage at an exact level, but is designed to maintain a set of tolerances around the target voltage. The regulator also provides a certain amount of load regulation to compensate for the changes in load current.

LP2985-29DBVR Features

The LP2985-29DBVR series offers several features that make it an ideal choice for a wide range of applications. These features include:• Low-dropout voltage and low quiescent current output • Improved transient response and improved reverse leakage current• Wide input voltage range• Output voltages of 0.8V to 5.0V• Operating temperature range of -40 °C to +125 °C• Built-in protection against over-temperature, over-current, and output short-circuit.

LP2985-29DBVR Benefits

The LP2985-29DBVR offers many benefits due to its improved performance. Among these are improved system efficiency and reliability, as well as overall cost reduction. The low-dropout regulator architecture leads to increased efficiency in the overall power stage, important for applications where system power is at a premium. Additionally, the low output voltage drop leads to improved system reliability, as the transformer and other components will not be subject to the same stresses as when using a higher dropout device. As for the overall cost, the device helps to reduce the cost by eliminating external components such as a shutdown resistor, eliminating the need for an external bypass, and by reducing board space requirements.

LP2985-29DBVR Applications

The LP2985-29DBVR is ideal for a wide range of system power applications, especially those requiring cost and space efficiency. These include post-regulators for switching supplies, battery supply systems, automotive applications, and portable system power supplies. The features of the LP2985-29DBVR, such as its wide input voltage range, low quiescent current output, improved transient response and improved reverse leakage, make it a good fit for these applications.

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