LP38690SD-5.0

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The LP38690SD-5.0 is a DC/DC converter suitable for a variety of applications, including mobile devices, digital video, or medical equipment. The LP38690SD-5.0 is a monolithic linear PMIC (power management integrated circuit) featuring an adjustable output voltage and a 5.0V input voltage. It is part of the LP38690 series of high-performance PMICs which feature overload and over-temperature protection, adjustable tracking and sequencing options, and a wide input operating temperature range.

The LP38690SD-5.0 is a positive voltage regulator that provides a regulated output voltage of +5.0 Vdc from an input voltage ranging from +2.7V to +6.0V. Because voltage regulation is performed with an internal power transistor the part requires no external components and the device is capable of providing up to 1A of output current. The output voltage is easily adjustable via an external resistive divider, allowing for both simple and sophisticated voltage regulation. The product also features over-current protection, short-circuit protection, thermal protection, under-voltage lockout, and a soft-start option. The thermal protection is integrated with an internal thermal sensing transistor that monitors heatsink temperature.

The LP38690SD-5.0 operates in the buck conversion mode, wherein the input voltage is the higher voltage value, and it is converted to the regulated output voltage. The buck conversion mode “steps down” a higher voltage to a lower voltage, while maintaining a constant current source. The switching frequency of the LP38690 is optimized for low-noise operation and can be set via an external resistor. The open-drain output signal, COMP, is available to shut down the output voltage if a fault is detected. This signal can also be used as a power-good indicator.

The LP38690SD-5.0 offers a number of advantages for applications with power density, high efficiency, and space constraints. The integrated on-chip power transistor reduces the need for additional passive components and allows for a small footprint. Additionally, the adjustable output enables fine tuning for specific application requirements. The thermal protection feature helps to minimize thermal runaway, since the internal thermal sensing transistor monitors heatsink temperature.

The LP38690SD-5.0 is a highly efficient linear PMIC featuring a wide input voltage range, adjustable output voltage, over-current protection, and thermal protection. Its small size allows it to fit into applications where space is at a premium, while providing improved power density and long-term reliability. Its adjustable output voltage option makes it a highly configurable solution for a variety of applications. The fault monitoring options and open-drain output signal can be used to ensure stable operating conditions and minimize the impact of faults and other off-nominal operating conditions. The Thermal Protection feature helps to minimize thermal runaway and improve system reliability in high-temperature applications.

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