SPX2815AT-L/TR

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The SPX2815AT-L/TR is a three-terminal, integrated, low dropout (LDO) linear voltage regulator. It is part of the voltage regulator family in the Power Management Integrated Circuits (PMICs) category. The SPX2815AT-L/TR is well-suited to a variety of applications, and its working principle is straightforward.

The SPX2815AT-L/TR is ideal for low voltage, low current applications like handheld devices, remote control systems and other portable equipment that require extended battery life. Its output voltage is adjustable between 1.2 V and 5 V (±2% accuracy), with a maximum output current up to 500 mA. It is a single-channel device that supports a wide range of input voltages between 1.5 V and 5.5 V and is designed to run from a single Li-ion or Li-polymer battery. It is RoHS compliant and uses lead-free technology, making it a popular choice in many green energy applications.

The SPX2815AT-L/TR is designed to support pulse and short-duration overload conditions up to 2.3 A continuous current. It can be configured to provide an output current of up to 500 mA when used in parallel to achieve higher output current requirements. To protect against potentially harmful over-voltage, it has an integrated over-voltage protection (OVP) function. It also has an integrated reverse current protection circuit that helps to prevent reverse leakage current from the LDO output under all normal operating conditions.

The SPX2815AT-L/TR features a low quiescent current of typically just 0.9 mA (TYP). The excellent temperature stability ensures a stable output voltage over a wide temperature range, ranging from -40⁰C to +125⁰C. It also has an excellent power supply rejection ratio (PSRR) of 65 dB (TYP) and is available in various packages, including the industry standard SOT-23-5 package.

The SPX2815AT-L/TR provides high performance and reliable operation in a wide range of electrically noisy operating environments. Its simple working principle is based on a three terminal voltage regulator IC, which use a reference voltage and output voltage to control the current flow from the output to the ground. A voltage divider is used to reduce the input voltage to the desired output voltage. A series of resistors and transistors form the voltage divider. The transistors form the feedback loop and, together with the reference voltage, they act as an error amplifier to actively adjust the output voltage. The output voltage is continuously monitored to ensure that it stays within acceptable limits.

The SPX2815AT-L/TR is a cost-effective solution for a wide range of portable, low voltage, low current applications, with great stability and dependability. Its adjustable output, low quiescent current, and OVP features make it an ideal choice for applications that require reliable performance in noisier conditions and with changing environmental conditions.

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