Texas Instruments

LP5900SD-1.8  

Linear & Switching Voltage Regulators

LP5900SD-1.8 Description

The LP5900SD-1.8 is a fixed-output linear voltage regulator designed by Texas Instruments, offering a stable 1.8V output with a maximum output current of 150mA. This regulator is optimized for low power consumption, with a quiescent current of only 50 µA and a supply current of up to 230 µA. It features a low dropout voltage of 0.15V at 150mA, ensuring efficient operation even at low input voltages down to 5.5V. The LP5900SD-1.8 is housed in a compact 6-lead WSON package, making it suitable for surface-mount applications. It includes an enable control feature and robust protection mechanisms such as over-temperature and short-circuit protection. Despite being marked as obsolete, the LP5900SD-1.8 remains a reliable choice for applications requiring a low-power, low-dropout voltage regulator.

LP5900SD-1.8 Features

• Fixed Output Voltage: Provides a stable 1.8V output, ideal for applications requiring a consistent power supply.
• Low Dropout Voltage: With a maximum dropout voltage of 0.15V at 150mA, it ensures efficient operation even at low input voltages.
• Low Quiescent Current: Consumes only 50 µA in quiescent state, making it suitable for battery-powered and low-power applications.
• Enable Control: Features an enable pin for power control, allowing dynamic power management.
• Protection Features: Includes over-temperature and short-circuit protection to safeguard the regulator and connected circuits.
• Compact Packaging: Housed in a 6-lead WSON package, suitable for surface-mount applications and space-constrained designs.
• Wide Input Voltage Range: Operates with a maximum input voltage of 5.5V, providing flexibility in power source selection.
• High PSRR: Offers a power supply rejection ratio (PSRR) of 85dB at 100Hz to 40dB at 100kHz, ensuring minimal noise and ripple in the output voltage.

LP5900SD-1.8 Applications

The LP5900SD-1.8 is well-suited for a variety of applications where low power consumption and stable voltage regulation are critical. These applications include:

• Battery-Powered Devices: Ideal for portable electronics and IoT devices where battery life is a key consideration.
• Low-Power Systems: Suitable for microcontroller units (MCUs), sensors, and other low-power electronic systems.
• Embedded Systems: Can be used in embedded systems requiring a reliable and efficient power supply.
• Consumer Electronics: Applicable in consumer electronics where low noise and stable voltage are essential for performance.
• Industrial Controls: Useful in industrial applications where compact size and robust protection features are necessary.

Conclusion of LP5900SD-1.8

The LP5900SD-1.8 from Texas Instruments is a versatile and efficient linear voltage regulator designed for low-power applications. Its low dropout voltage, low quiescent current, and compact packaging make it an ideal choice for a wide range of applications, from battery-powered devices to industrial controls. Despite its obsolete status, the LP5900SD-1.8 continues to offer reliable performance and robust protection features, ensuring it remains a valuable component in the electronics industry.

LP5900SD-1.8 Documents

Download datasheets and manufacturer documentation for LP5900SD-1.8