LM5008A

• Operating Input Voltage Range: 6 V to 95 V
• Integrated 100-V N-Channel Buck Switch
• Internal Start-Up Regulator
• No Loop Compensation Required
• Ultra-Fast Transient Response
• On-Time Varies Inversely With Input Voltage
• Operating Frequency Remains Constant With Varying Line Voltage and Load Current
• Adjustable Output Voltage From 2.5 V
• Highly Efficient Operation
• Precision Internal Reference
• Low Bias Current
• Intelligent Current Limit
• Thermal Shutdown
• 8-Pin VSSOP and 8-Pin WSON Packages
• Create a Custom Design Using the LM5008A With the WEBENCH^® Power Designer

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The LM5008A DC/DC converter is a functional variant of the LM5008 COT Buck Switching Regulator. The functional differences of the LM5008A are: the minimum input operating voltage is 6 V, the on-time equation is slightly different, and the requirement for a minimum load current is removed.

The LM5008A 350-mA step-down switching regulator features all of the functions required to implement a low-cost and efficient buck regulator. This high-voltage converter has an integrated 100-V N-channel buck switch and operates over an input voltage range of 6 V to 95 V. The device is easy to implement and is provided in 8-pin VSSOP and the thermally enhanced 8-pin WSON packages. The converter uses PWM control scheme with an on-time inversely proportional to V_IN. This feature allows the operating frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced off-time, which is inversely proportional to V_OUT. This scheme ensures short-circuit control while providing minimum foldback. Other features include: thermal shutdown, V_CC undervoltage lockout, gate drive undervoltage lockout, maximum duty cycle limiter, and a pre-charge switch.