LX1682CDM

LX1682CDM Application Field and Working Principle

The LX1682CDM is a pulse width modulation (PWM) controller from Linear Technology\'s Hierarchical PWM (HiPWM) family of integrated circuits. It is a low voltage DC to DC switching regulator control integrated circuit (IC) which is an ideal solution for complex industrial, automotive and communications efficiency and power density applications. The LX1682CDM is specifically engineered for the requirements of microprocessor core and SoC power supplies, providing an efficient, cost-effective and high performance power management solution.

The LX1682CDM is designed to operate as a two-transistor PWM power switch by providing on/off switching assistance to the primary control regulation. It combines a high-efficiency, constant-frequency PWM controller with a low-side power MOSFET switch, as well as several protection features. The LX1682CDM can be used to provide a voltage, current and thermal-limit with a PWM ratio of up to 0.97. It offers several advantages over traditional PWM designs, including improved efficiency, better thermal performance and no-load power consumption.

The LX1682CDM can be used in conjunction with a DC-DC converter, as a parallel-connected synchronous buck converter, or as a single or multi-phase buck regulator. When used with a DC-DC converter, the LX1682CDM regulates the output voltage according to the Load State or Output Conduction and can be configured for low input-to-output voltage conversion ratios. The converter can apply automatic or manual voltage sequencing, voltage margining, current and power monitoring and thermal protection.

The LX1682CDM provides a high degree of integration, allowing system designers to reduce the complexity, number of components and board space requirements associated with other standalone power management ICs. The IC also offers excellent common mode and differential mode noise attenuation, making it an ideal choice for noise sensitive applications.

The LX1682CDM provides an adjustable VIN_UVLO input operational voltage, which sets the minimum voltage necessary to enable the device. The IC also features a power good indicator, which provides an output when the regulated output voltage meets the design specification. Additionally, a user-adjustable Shutdown pin allows the user to reduce power consumption by cutting off the supply voltage when not required.

In summary, the LX1682CDM is a powerful, intelligent and efficient integrated PWM controller, providing an excellent power management solution for complex applications. The IC loves a wide variety of topologies, offering superior regulation, performance and protection for a broad range of applications. Its integrated power switch and control functionality provide a cost-effective solution for power supply designers looking for a reliable, high-performance and low-cost solution.