LM25019MR/NOPB

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LM25019MR/NOPB, which is a DC-DC switching regulator, is a type of power management integrated circuit (PMIC) used for power supervisory and regulation applications. As such, the device is specially designed to efficiently convert the power supply voltage into the desired level for the system’s components, enabling them to properly operate in different conditions. The operating frequency is adjustable up to 1MHz range in order to optimize size, efficiency and cost. Additionally, the device contains an internal 57µA current source, adjustable over-temperature/voltage protection, input/output overtemperature protection and an analog and PWM control loop.

LM25019MR/NOPB is ideal for battery-powered systems with light loads because of its low quiescent current and wide input voltage range from 4.5V to 20V. It also provides output accuracy with 0.8% accuracy for applications in notebook, tablets and other battery-powered designs. Furthermore, it is tailored to applications such as powering FPGA, ASIC’s and uP’s and has a recommended operating temperature range of 0 to 70 °C (TJ).

LM25019MR/NOPB works based on the Pulse-Width Modulation (PWM) technique. It comprises several components, including a resistive divider, an error amp and a power switch. The error amplifier compares the output voltage with the feedback voltage, and depending on the result, it controls the duty cycle of the power switch. The duty cycle determines the amount of current allowed to pass, and so it is used to change the output voltage. For safety, the device also features a current sense comparator and an over-voltage protector, to prevent over-voltage on the output.

This device, controlled by single-ended input, is capable of regulating the output voltage with excellent accuracy and efficiency. It also provides several advanced features and packages: enable/disable with an external TTL/CMOS compatible input, power saving mode, enable pin, power good output and enableH_pc power control.

In summary, the LM25019MR/NOPB can be used in various applications that require the power supervisory and regulation, such as powering of FPGA, ASIC’s and uP’s. This device offers high efficiency and power handling, as well as low quiescent current and wide input voltage range, making it ideal for powering notebook and tablet applications.

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