LP38841SX-1.2

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LP38841SX-1.2 is a low dropout linear voltage regulator specifically designed for applications requiring low quiescent current over a wide load current range—from light to heavy load. Operating over a wide input voltage range of up to 28V, the LP38841SX-1.2 provides superior performance characteristics that are beneficial for current-sensitive applications such as networking systems, storage devices, LED drivers, and DC-DC converters. The ultra-low quiescent current minimizes power consumption under light loads, while the built-in temperature-compensated current limit provides fast and effective protection from output overcurrent.

LP38841SX-1.2 is capable of delivering up to 250mA of continuous output current with a dropout voltage of just 0.3V. The monolithic IC is designed for fast transient response and excellent ripple rejection through the use of an external N-channel MOSFET pass transistor. A thermal shutdown feature is provided which operates at 160°C nominal and will protect the circuit’s components from thermal damage due to overload or over temperature. The feature forces a hiccup-mode regulator to shut down and restart after the fault is over.

To maintain accuracy, the LP38841SX-1.2 utilizes an internal voltage reference and voltage divider circuit. This ensures that the output voltage tracks the reference voltage over temperature and line voltage variations. Additionally, the device is also designed for low noise operation with noise reduction circuits that reduce switching noise.

LP38841SX-1.2 has a wide range of applications such as low quiescent current systems, battery power management, and automotive systems. It is especially well-suited for battery-operated applications that require ultra-low supply current and excellent line and load transient performance. Its small size and pin-out configuration make it an optimal solution for space-constrained applications. The device is available in an SO-8 package, making it a compact and flexible solution for multiple workloads.

In terms of its working principle, LP38841SX-1.2 is a linear voltage regulator. It takes a higher input voltage, reduces it to a lower voltage, and then supplies it to the load. The regulator typically consists of three components: an operational amplifier, an output transistor, and a pass element. The operational amplifier acts as a control amplifier, where it compares the output voltage with a reference voltage. Upon sensing a discrepancy, the amplifier signals the output transistor to draw more or less current through the pass element, thus regulating the output voltage.

LP38841SX-1.2 provides an excellent level of performance, stability, and protection—suitable for a wide range of applications. Its combination of ultra-low quiescent current and excellent transient response makes it the right choice for battery-operated systems, as well as small-size, current-sensitive applications. Its wide input voltage range and high output current guarantee reliable operation over a variety of conditions, making it an ideal choice for a variety of applications.

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