LP5907SNX-3.3/NOPB

Current - Output:	250mA
Base Part Number:	LP5907
Supplier Device Package:	4-X2SON (1x1)
Package / Case:	4-XDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	90dB ~ 60dB (100Hz ~ 100kHz)
Current - Supply (Max):	425µA
Current - Quiescent (Iq):	25µA
Series:	--
Voltage Dropout (Max):	0.25V @ 250mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
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

LP5907SNX-3.3/NOPB is a voltage regulator from Texas Instruments\' family of products designed to control the power supply in different applications. It is part of the PMIC (Power Management IC) product portfolio and falls under the category of linear voltage regulators. It is a low-noise, low-dropout (LDO) voltage regulator that features high accuracy, low power consumption, excellent temperature performance and low on-resistance. It is suitable for a variety of applications, such as motor control or robotics, process control, medical and automotive electronics.

Application Field and Working Principle

LP5907SNX-3.3/NOPB is an LDO, low-dropout linear voltage regulator with an operating input voltage of 3V to 5.5V and an output voltage of 3.3V, respectively. The output voltage of the regulator is adjustable, and the typical drop out voltage is 28mV at full load, 1.2mA of output current and 5V of supply voltage. The main field of application for the LP5907SNX-3.3/NOPB are systems with moderate powering requirements, for instances that require implemented low-noise signals. Furthermore, it can be used for a variety of interference sensitive systems.The working principle of the regulator is based compared to standard voltage regulator, the LP5907SNX-3.3/NOPB offers improved efficiency with the addition of a precision voltage reference, a transistor and a PMOS pass transistor. An internal comparator of the voltage regulator constantly and accurately monitors the output voltage. The output is then adjusted dynamically by the PMOS pass transistor and a constant current source based on the precision reference. This process is repeated until the device detects the output voltage is decentralized and stabilized to the desired voltage

Modes of Operation

The LP5907SNX-3.3/NOPB has two operating modes: Active mode and Shutdown mode. In Active mode, the pass transistor is active and the supply voltage and ground pins are connected in parallel, thus allowing the regulated output of 3.3V to be generated. Furthermore, in this mode, a 10µA current is drawn from the input when the device is in standby & shutdown, the device is capable of consuming approximately 100µA maximum. In Shutdown mode, the pass transistor enters a tri-state mode, meaning that the supply and ground pins are no longer connected and a minimum current of 10nA is consumed. The LP5907SNX-3.3/NOPB operates in this mode in order to conserve power, or when it needs to be turned off.

Features and Advantages

The LP5907SNX-3.3/NOPB is designed to provide good power supply stability, and its features and advantages include:•  Low-noise output voltage with ESR (equivalent series resistance) of 0.26Ω•  High accuracy with a total output tolerance of ±1.2%•  Low quiescent current of 1.2mA•  Low drop out voltage of 28mV•  Low ripple and noise of 40mVp-p•  Internal thermal shutdown and overvoltage protection•  Good temperature performance

Conclusion

In conclusion, the LP5907SNX-3.3/NOPB is an excellent choice for low-power applications that require precise voltage regulation and low-noise output. Its stability and temperature performance make it a great option for motor control, robotics, process control, medical and automotive electronics. Its small size makes it ideal for applications requiring smaller PCB footprints. The device features a wide range of features that make it an ideal voltage regulator solution for designers seeking low-power, low-noise, and easy to use regulator.

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