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LM1771 - Low Voltage synchronous buck controller

Description

The LM1771 is an efficient synchronous buck switching controller with a precision enable requiring no external compensation.

The constant on-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space.

Features

  • n n n n n n n n n Input voltage range of 2.8V to 5.5V 0.8V reference voltage Precision enable No compensation required Constant frequency across input range Low quiescent current of 400 µA Internal soft-start Short circuit protection Tiny LLP-6 package and MSOP-8 package.

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www.DataSheet4U.com LM1771 Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation June 2006 LM1771 Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation General Description The LM1771 is an efficient synchronous buck switching controller with a precision enable requiring no external compensation. The constant on-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. The precision enable pin allows flexibility in sequencing multiple rails and setting UVLO. The LM1771 also incorporates a unique input feed-forward to maintain a constant frequency independent of the input voltage. The LM1771 is optimized for a low voltage input range of 2.8V to 5.