LM25141QRGETQ1

PMIC - Voltage Regulators - DC DC Switching Controllers

The LM25141QRGETQ1 is a DC DC switching controller designed to facilitate the efficient design of non-isolated step-down power supplies. The device features a wide range of operating modes to support various application demands, allowing the designer to quickly set up the device while minimizing time-to-market. With an integrated voltage supervisor, it can be configured to run with an external PWM controller, FETs, and LC filters. Its wide input voltage range, up to 42V, makes it suitable for a variety of types of power suppliers, including automotive, telecommunications, and industrial applications.

Application fields

The LM25141QRGETQ1 is suitable for use in a range of applications including power tool chargers, portable and PC power supplies, charging systems, DC-DC adaptors, front-end converters and smart power modules. Due to its high efficiency, the device can also be used in a variety of automotive, telecommunications and industrial applications.

Working Principle

The LM25141QRGETQ1 is a DC-DC switching controller that works with both low frequency (35kHz to 50kHz) and constant frequency (125kHz/250kHz) pulse width modulation (PWM). It is designed to provide efficient power conversion in a wide range of input voltages, up to 42V, while minimizing the external components requirements. The device features several parameters that can be adjusted such as valley current, overshoot current and frequency.

The LM25141QRGETQ1 is equipped with a voltage supervisor circuit to detect low input voltage, shorted output voltage, malfunction of the device, and timer overrun. It also has an over current protection (OCP) circuit that limits the inductor current to an adjustable setting. Furthermore, it also contains an internal soft-start circuit that makes the device suitable for high-side synchronous buck or low-side synchronous buck converters.

The LM25141QRGETQ1 can be used with an external PWM controller for applications requiring higher duty cycle or higher load current. It is also capable of providing full protection during an inrush current. The device can be configured in either postive or negative buck-boost topologies depending on the relative levels of input voltage and output voltage. In addition, it can also operate in either discontinuous current mode or continuous conduction mode depending on the load\'s requirements.

All in all, the LM25141QRGETQ1 is a highly efficient DC-DC switching controller that is suitable for a wide range of applications, ranging from power tool chargers to automotive, telecommunications, and industrial applications. It has a wide input voltage range, up to 42V, which enables a variety of different power supplies. Furthermore, its adjustable parameters, voltage supervisor, and protection circuits help to simplify the design process by reducing the required external components.