Texas Instruments

LP2985-33DBVRE4

LP2985-33DBVRE4 Description

The LP2985-33DBVRE4 from Texas Instruments is a fixed 3.3V, 150mA low-dropout (LDO) linear voltage regulator designed for precision power management in space-constrained applications. Packaged in a SOT-23-5 form factor, it features a low dropout voltage of 0.58V (max) at 150mA, making it ideal for battery-powered systems where input voltage headroom is limited. With a wide input voltage range (up to 16V) and ultra-low quiescent current (95 µA), it ensures efficient operation in portable and always-on devices. The device is RoHS3 compliant and REACH unaffected, meeting stringent environmental standards.

LP2985-33DBVRE4 Features

• Fixed 3.3V Output: Stable regulation for sensitive analog/digital loads.
• Low Dropout Voltage: 0.58V (max) at 150mA, enabling operation with minimal input-output differential.
• Ultra-Low Quiescent Current: 95 µA (typ), extending battery life in portable applications.
• High PSRR (45dB @ 1kHz): Excellent noise rejection for clean power delivery.
• Enable Pin: Allows for power sequencing or shutdown to reduce standby power.
• Robust Protection: Includes over-current, over-temperature, and short-circuit protection for enhanced reliability.
• Surface-Mount (SOT-23-5): Compact footprint for space-constrained designs.
• Wide Input Range (2.5V–16V): Supports diverse power sources, including batteries and unregulated supplies.

LP2985-33DBVRE4 Applications

• Battery-Powered Devices: Ideal for IoT sensors, wearables, and handheld electronics due to low Iq and dropout.
• Noise-Sensitive Systems: Suitable for RF modules, ADCs, and audio circuits with high PSRR.
• Industrial/Embedded Systems: Reliable power for microcontrollers, FPGAs, and peripherals in harsh environments.
• Automotive Electronics: Stable 3.3V supply for infotainment, telematics, and control modules (non-safety-critical).
• Consumer Electronics: Used in smart home devices, USB peripherals, and low-power displays.

Conclusion of LP2985-33DBVRE4

The LP2985-33DBVRE4 stands out as a high-performance, compact LDO with low noise, low dropout, and robust protection features. Its combination of efficiency, reliability, and small footprint makes it a top choice for designers optimizing power budgets in portable, industrial, and noise-sensitive applications. Texas Instruments’ reputation for quality ensures this regulator meets the demands of modern electronic systems.