LM25085AMM

• Wide input voltage range of 4.5V to 42V
• Adjustable current limit used R_DS（ON）or current sense resistors
• Programmable switching frequency up to 1MHz
• No loop compensation is required
• Ultra-fast transient response
• Nearly constant line and load varying operating frequency
• Voltaje de salida ajustable de 0.9V
• Accuracy± 2% feedback reference
• Can work at 100% duty cycle
• Internal soft-start timer
• Integrated high voltage bias regulator
• Thermal shutdown

illustrate

El LM25085A es una variante funcional del controlador de interruptor reductor LM25085 de COT PFET. Las diferencias funcionales del LM25085A son un voltaje de referencia de retroalimentación de 0.9V, tiempos de apagado forzado más largos después de la detección del límite de corriente y tiempos de arranque suave más cortos (1.8 ms).

El LM25085A es un controlador regulador de conmutación de alta eficiencia que se puede utilizar para desarrollar rápida y fácilmente un regulador reductor pequeño y de alta eficiencia para una amplia gama de aplicaciones. This high voltage controller contains a gate driver for PFET and a wide 4.5V to 42V input range with high voltage bias regulation. The principle of constant on-time regulation, eliminating the need for loop compensation, simplifies the implementation of circuits, and results in ultra-fast load transient response. The operating frequency remains almost constant due to the inverse relationship between the input voltage and the time due to the inverse relationship between the line and the load. The architecture of the PFET allows 100% duty cycle operation of low dropout. Either PFET, or an external sense resistor R_{DS（ON），}It can be used to detect current overcurrent detection.