SPX3819R2-L-1-8/TR

Current - Output:	500mA
Supplier Device Package:	8-DFN (2x3)
Package / Case:	8-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	--
Current - Supply (Max):	30mA
Current - Quiescent (Iq):	8µA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	1.8V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The SPX3819R2-L-1-8/TR is a low dropout (LDO) linear voltage regulator from Sipex Corporation. It is a three-terminal regulator with a wide input voltage range of 1.8V - 15V and 1.5A typical output current. It is ideal for battery-powered systems requiring low quiescent current and fast load transient response.

Applications

The SPX3819R2-L-1-8/TR is a versatile regulator and can be used in wide range of applications such as industrial, automotive, computer and communication. Its main applications include: -Battery-powered handhelds -Portable computers and cell phones-Multi-voltage and multi-rail applications-USB Port Power-Battery-backed and remote applications-Local on-card voltage regulation-Post-regulator for switching regulators

Features

The SPX3819R2-L-1-8/TR offers high performance, reliable operation and fast transient response. Its salient features include: -Input voltage range of 1.8V - 15V-1.5A typical output current -Thermal shutdown and current limit protection -Low quiescent current of 25 μA -Excellent line and load regulation -High PSRR of 105 dB -Low dropout voltage of 115 mV -Output voltage accuracy of +/- 2%

Working Principle

The SPX3819R2-L-1-8/TR is an LDO or low dropout voltage regulator. It works by maintaining a fixed voltage difference between its input and output terminals. This is achieved by using an active feedback system, which senses the load at the output and regulates the input current to maintain the required output voltage. The LDO consists of an error amplifier, a pass transistor, a voltage reference and a compensation network. When the input voltage exceeds its target output voltage, the error amplifier activates the pass transistor and gradually increases the load current until a balance is reached. Similarly, when the load increases and the output voltage drops, the error amplifier reduces the pass transistor current. This process is repeated until the output voltage is stabilized at the required level. The SPX3819R2-L-1-8/TR provides excellent line and load regulation of 0.3% over its full operation range, thanks to its high PSRR of 105 dB and low dropout voltage of 115 mV. This ensures that the output voltage remains within its accuracy of +/- 2%. Its low quiescent current of 25 μA also makes it ideal for battery-powered products.

Conclusion

The SPX3819R2-L-1-8/TR from Sipex Corporation is a low dropout (LDO) linear voltage regulator, ideal for a wide range of applications that require low quiescent current, fast transient response and high PSRR. With a wide input voltage range of 1.8V - 15V, 1.5A typical output current, thermal shutdown and current limit protection, low dropout voltage of 115 mV and 0.3% line and load regulation, it offers reliable and stable operation with excellent performance in its class.

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