The Texas Instruments LP38851 is a high-performance, low-dropout (LDO) linear voltage regulator designed to deliver a continuous load current of up to 800mA with an input voltage range of 2.7V to 5.5V. This regulator is ideal for a wide array of applications, including but not limited to, powering sensitive analog and RF circuitry in mixed-signal systems.

Key Features

• Output Voltage Range: The LP38851 provides a stable and precise output voltage, adjustable from 1.2V to 3.3V, ensuring compatibility with a variety of low-voltage ICs and microprocessors.
• Low Dropout: With a dropout voltage typically less than 230mV at full load, the LP38851 maintains efficient operation even when the input-to-output voltage differential is minimal.
• High Accuracy: The output voltage accuracy is maintained within ±1.5%, which is critical for applications requiring a consistent power supply.
• Thermal Protection: The device includes an internal thermal shutdown mechanism that protects the IC from damage due to overheating.
• Current Limit Protection: The built-in current limit feature helps to safeguard the device and the load from fault conditions.
• Low Quiescent Current: The LP38851 has a low quiescent current of typically 850µA, making it suitable for battery-powered devices.
• Stable with Low-ESR Output Capacitors: The regulator is stable with ceramic capacitors as low as 10µF, allowing for smaller and more cost-effective designs.
• Package Options: Available in multiple package options, including TO-220, TO-263, and WSON, providing flexibility for various design requirements.

Applications

The LP38851 is perfectly suited for a range of applications that require a clean and stable power supply. It is commonly used in:

• Point-of-Load applications from 5V or 3.3V rails
• Post-regulation for switching supplies
• High-end audio and video applications
• RF and analog circuits
• Microprocessor and FPGA supply rails
• Portable and battery-powered equipment

With its combination of features, the Texas Instruments LP38851 is a robust and reliable choice for designers looking to optimize power management in their electronic systems.