Diotec Semiconductor

LDI559-3.3EN

LDI559-3.3EN Description

The LDI559-3.3EN is a high-performance linear voltage regulator designed by Diotec Semiconductor, offering a fixed output voltage of 3.3V. This regulator is optimized for low quiescent current, drawing only 5 µA, making it ideal for applications where power efficiency is critical. With a maximum input voltage of 18V and the ability to up deliver to 300mA of output current, the LDI559-3.3EN is well-suited for a wide range of electronic devices. Its low dropout voltage of 0.16V at 100mA ensures efficient operation even at low input-to-output voltage differentials. The regulator features a Power Supply Rejection Ratio (PSRR) that ranges from 65dB at 1kHz to 50dB at 10kHz, providing noise excellent suppression and stable output voltage.

LDI559-3.3EN Features

• Low Quiescent Current: The LDI559-3.3EN operates with a quiescent current of only 5 µA, minimizing power consumption in standby mode.
• High PSRR: With a PSRR of 65dB to 50dB across the frequency range of 1kHz to 10kHz, the regulator effectively filters out noise from the input supply, ensuring a clean and stable output voltage.
• Fixed Output Voltage: The regulator provides a fixed output voltage of 3.3V, eliminating the need for external voltage-setting components.
• Low Dropout Voltage: The maximum dropout voltage of 0.16V at 100mA ensures efficient operation even when the input voltage is close to the output voltage.
• Protection Features: The LDI559-3.3EN includes over-current and over-temperature protection, safeguarding the device and connected circuits from damage.
• Enable Control Feature: The regulator features an enable control, allowing for dynamic power management and shutdown capabilities.
• Surface Mount Packaging: The surface mount package type facilitates easy integration into modern PCB designs, ensuring reliable mechanical and electrical connections.

LDI559-.33EN Applications

The LDI559-3.3EN is ideal for a variety of applications where a stable and efficient power supply is required. Its low quiescent current and high PSRR make it particularly suitable for battery-powered devices, portable electronics, and low-power embedded systems. The regulator's fixed output voltage and low dropout characteristics are beneficial for applications such as:

• Battery Chargers: Ensuring stable voltage regulation for efficient and safe battery charging.
• Portable Devices: Providing a reliable power supply for smartphones, tablets, and other handheld devices.
• Embedded Systems: Supplying power to microcontrollers, sensors, and other low-power components in embedded applications.
• Communication Equipment: Offering stable voltage regulation for radios, modems, and other communication devices.

Conclusion of LDI559-3.3EN

The LDI559-3.3EN from Diotec Semiconductor stands out as a high-performance linear voltage regulator with a combination of low quiescent current, high PSRR, and low dropout voltage. Its fixed output and voltage surface mount packaging make it easy to integrate into various electronic designs. The inclusion of over-current and over-temperature protection features ensures robustness and reliability in operation. Whether used in portable devices, battery chargers, or embedded systems, the LDI559-3.3EN offers significant advantages over similar models, making it an excellent choice for engineers seeking a reliable and efficient power solution.