L4969URDTR-E

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The L4969URDTR-E is a high efficiency DC/DC step-down (buck) converter integrated circuit (IC) product manufactured by STMicroelectronics. It is a highly integrated product with low output ripple and low EMI noise performance. It is suitable for many portable and embedded applications with high power efficiency requirements and demanding signal integrity.

The L4969URDTR-E is an IC that can take up to 16V of input and convert it to a fixed 3.3V output. It provides high efficiency, low voltage drop, low quiescent current and low EMI noise. It can operate as a stand-alone DC/DC converter or as an integrated part of a power supply system. It is optimized for battery powered applications with low quiescent current to maximize battery life.

The L4969URDTR-E offers a unique combination of features that make it well-suited for portable electronic devices. Its wide input voltage range allows it to operate from both low voltage batteries such as 3.6V and 4.2V lithium-ion cells as well as other input sources. Its output current capability is enough to support loads up to 1A. It also has a built-in power transistor, so no external FET is needed to switch the output voltage.

The L4969URDTR-E\'s core competence is its adjustable operating frequency. This allows for flexibility in system design, allowing designers to optimize the operating frequency for their particular application. The frequency can be adjusted between 350 kHz and 1.2 MHz. Lowering the frequency reduces the power dissipation and hence increases efficiency. The operating frequency can also be reduced to reduce EMI noise, making it a great choice for applications such as mobile phones, tablets and other portable electronics.

The L4969URDTR-E has two enable inputs, EN1 and EN2, which control the device\'s operation. When the enable inputs are low, the device is disabled. When the enable inputs are high, the device starts operating and the output voltage is regulated to the desired keep-on voltage (Vcc). EN1 also serves as an active-low reset for the device.

The L4969URDTR-E also has an internal current limit feature. This feature allows the maximum load current to be set to the desired value without the need of an external current sense resistor. This allows for improved power efficiency, as well as improved EMI performance.

The L4969URDTR-E is packaged in a 5mm x 5mm QFN package that is suitable for high volume and automated assembly. It also has an on-chip thermal protection feature that ensures the device remains safe when operated outside of the manufacturer\'s specifications. This guarantees the device\'s reliability in applications with extreme temperatures or unexpected loads.

The L4969URDTR-E is a highly integrated and low-cost DC/DC converter IC that is suitable for many portable electronic applications requiring high power efficiency and good EMI properties. It has adjustable frequency operation, wide input voltage range, low quiescent current, and current limit feature. Its small package allows it to be used in high-volume and automated assembly, making it an optimal choice for many cost-sensitive applications.

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