LM5008MM Datasheet

High-Voltage (100V) Step-Down Switching Regulator


The LM5008MM Step-Down Switching Regulator features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This high voltage regulator contains an 100 V N-Channel Buck Switch. The device is easy to implement and is provided in the VSSOP-8 and the thermally enhanced WSON-8 packages. The regulator is based on a hysteretic control scheme using an ON time inversely proportional to V IN . This feature allows the operating frequency to remain relatively constant. The hysteretic control requires no loop compensation. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit protection while providing minimum foldback. Other protection features include: Thermal Shutdown, V CC under- voltage lockout, Gate drive under-voltage lockout, and Max Duty Cycle limiter LM5008MM Features • Integrated 100V, N-Channel buck switch• Internal VCC regulator• No loop compensation required• Ultra-Fast transient response• On time varies inversely with line voltage• Operating frequency remains constant with varying line voltage and load current• Adjustable output voltage• Highly efficient operation• Precision internal reference• Low bias current• Intelligent current limit protection• Thermal shutdown• VSSOP-8 and WSON-8 (4mm x 4mm) Packages LM5008MM Applications • Non-Isolated Telecommunication Buck Regulator• Secondary High Voltage Post Regulator• +42V Automotive Systems


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Manufacturer information


Maxim Integrated provides ease of design, and speeds time to market, through analog integration. The company's analog ICs offer extra features and functionality carefully designed to streamline circuit and simplify design. Look to Maxim for solutions for consumer electronics, personal computers and peripherals, mobile devices, wireless and fiber communications, test equipment, instrumentation, video displays, and automotive applications. Maxim’s analog and mixed-signal solutions include data converters, interface circuits, power, RF wireless circuits, clocks and oscillators, microcontrollers (MCUs), operational amplifiers (op amps), and sensors.

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