LM5025CMTC/NOPB

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The LM5025CMTC/NOPB is a high-speed current mode pulse width modulation (PWM) controller. It is suited for VRM or VRD applications or point of load applications with an input voltage range of 4.5-14V and an output voltage range of 1.2-4V. The LM5025CMTC/NOPB is designed to control the power supply of modern computing and communication processors and provides superior voltage regulation with fast transient response. With a current-mode feedback architecture, the LM5025CMTC/NOPB can respond significantly faster than voltage-mode feedback regulators and have increased stability, enabling higher current and power handling capability. The LM5025CMTC/NOPB provides several features and options tailored to ease system design and reduce development time, including synchronized clock operation, leading-edge blanking circuit with an adjustable Blanking Time, and an adjustable maximum duty cycle with a programmable protection cycle for improved efficiency and current protection. The LM5025CMTC/NOPB can operate from 250kHz to 1.2MHz and is packaged in a thermally enhanced micro lead frame package.

Application FieldThe LM5025CMTC/NOPB is suitable for a wide range of voltage regulator applications, including VRM, VRD and point of load applications. The high power capability, adjustable frequency range and current-mode control enable implementation of high efficiency controllers for processors, ASICs, and high current supplies. In addition, the LM5025CMTC/NOPB can be used in automotive, notebook and high reliability systems.

Working PrincipleThe LM5025CMTC/NOPB work on the principle of pulse width modulation (PWM) control. In this technique, a triangular waveform is generated and a comparison done between it and the input voltage or reference voltage. The duty cycle of the PWM signal is then adjusted so as to maintain the output voltage. The LM5025CMTC/NOPB is a current-mode PWM controller, which means that the duty cycle is adjusted according to the amount of current flowing through the PWM circuit. This current-mode architecture allows for fast transient response as well as improved stability over voltage-mode architectures.

The LM5025CMTC/NOPB has several features to make the design process easier. It has an adjustable switching frequency range of 250kHz-1.2MHz, which allows for easy optimization for different applications. It also has built-in leading-edge blanking with an adjustable Blanking Time, allowing the user to adjust the current sense amplifiers’ settling time to reduce noise. In addition, the device has a programmable maximum duty cycle and protection cycle, which helps improve efficiency and reduces current waste.

ConclusionThe LM5025CMTC/NOPB is a high-speed current mode pulse width modulation (PWM) controller suitable for VRM or VRD applications or point of load applications with an input voltage range of 4.5-14V and a maximum output voltage of 4V. The current-mode feedback architecture provides superior voltage regulation with fast transient response, while the adjustable frequency range, leading-edge blanking, programmable maximum duty cycle and protection cycle, make design and implementation simpler. The LM5025CMTC/NOPB is packaged in a thermally enhanced micro lead frame package, and therefore, suitable for automotive, notebook and high reliability systems.

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