STMicroelectronics

LD39030DTPU33R

LD39030DTPU33R Description

The LD39030DTPU33R is a high-performance, low-dropout (LDO) linear voltage regulator from STMicroelectronics, designed to deliver a fixed 3.3V output with a maximum current of 300mA. This compact, surface-mount device operates within an input voltage range of up to 5.5V, making it suitable for a wide variety of low-power applications. With a low dropout voltage of 0.33V at 300mA, it ensures efficient power conversion even when the input voltage is close to the output level. The regulator features ultra-low quiescent current (40 µA), enhancing energy efficiency in battery-operated systems. Its robust design includes over-current, over-temperature, and soft-start protection, ensuring reliable operation under demanding conditions.

LD39030DTPU33R Features

• Fixed 3.3V Output: Ensures stable voltage regulation for sensitive electronics.
• Low Dropout Voltage: 0.33V @ 300mA minimizes power loss, ideal for low-input scenarios.
• Ultra-Low Quiescent Current: 40 µA extends battery life in portable devices.
• High PSRR: 80dB to 55dB (1kHz–100kHz) suppresses noise for clean power delivery.
• Integrated Protection: Over-current, over-temperature, and soft-start features enhance reliability.
• Enable Control: Allows power management via an external signal.
• Compact 4DFN Package: Space-saving design for high-density PCB layouts.
• RoHS3 & REACH Compliant: Meets environmental and safety standards.

LD39030DTPU33R Applications

This LDO regulator is ideal for applications requiring precise, low-noise voltage regulation, including:

• Portable & Battery-Powered Devices: Smartwatches, IoT sensors, and wireless modules benefit from its low Iq.
• Consumer Electronics: Power management for microcontrollers, memory, and peripherals in gadgets.
• Industrial Systems: Reliable voltage regulation for sensors, PLCs, and control circuits.
• Medical Devices: Low-noise operation suits wearable health monitors and diagnostic equipment.
• Automotive Electronics: Stable power for infotainment and telematics systems (non-safety-critical).

Conclusion of LD39030DTPU33R

The LD39030DTPU33R stands out as a versatile, high-efficiency LDO regulator, combining low power consumption, robust protection, and compact packaging. Its superior PSRR and dropout performance make it a preferred choice for noise-sensitive and energy-efficient designs. Whether in portable electronics, industrial controls, or medical devices, this regulator delivers reliable, precise power while meeting stringent environmental standards. For engineers seeking a balance of performance and size, the LD39030DTPU33R is an optimal solution.