The LP3986BLX-3333, manufactured by National Semiconductor (now Texas Instruments), is a low-dropout (LDO) voltage regulator. These regulators are designed to provide a stable and consistent output voltage even when the input voltage fluctuates or drops below the desired output level. The '3333' likely refers to a fixed output voltage of 3.3V. The LP3986 family is known for its low quiescent current and small package size, making it suitable for portable and battery-powered applications.

Applications

• Mobile Phones: Powering core logic, memory, and peripherals.
• PDAs and Smart Devices: Providing stable voltage for processors and other sensitive components.
• Portable Media Players: Ensuring consistent performance and extending battery life.
• Wireless Communication Devices: Regulating voltage for RF transceivers and baseband processors.
• Digital Cameras: Powering image sensors, processors, and memory.

Features

• Low Dropout Voltage: Maintains regulation with minimal input-output voltage differential.
• Fixed Output Voltage: Provides a stable 3.3V output.
• Low Quiescent Current: Minimizes power consumption in standby mode, extending battery life.
• Short-Circuit Protection: Protects the regulator and connected circuitry from damage in case of a short circuit.
• Over-Temperature Protection: Shuts down the regulator if the junction temperature exceeds a safe limit.
• Enable Pin: Allows for power sequencing and controlled shutdown.
• Small Package Size: Enables compact designs for portable devices.
• High Output Accuracy: Ensures precise voltage regulation for sensitive components.

Benefits

• Extended Battery Life: Low quiescent current minimizes power consumption in portable devices.
• Improved System Stability: Stable output voltage ensures reliable operation of connected components.
• Simplified Design: Fixed output voltage eliminates the need for external feedback resistors.
• Enhanced System Protection: Short-circuit and over-temperature protection prevent damage to the regulator and connected circuitry.
• Reduced Board Space: Small package size enables compact designs for space-constrained applications.
• Reliable Performance: High output accuracy ensures consistent performance under varying load conditions.

Additional Details

The LP3986BLX-3333 typically requires a small external capacitor for stability. Refer to the datasheet for recommended capacitor values and placement. The device operates over a specified temperature range, typically -40°C to +85°C or higher. The dropout voltage is typically a few hundred millivolts at the rated output current. The enable pin can be used to disable the regulator, reducing the supply current to a very low level. The specific package type is often a micro SMD or similar small footprint package, enabling high density board designs. For detailed specifications and application information, consult the official Texas Instruments datasheet for the LP3986 family.