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LM3485 - Hysteretic PFET Buck Controller

General Description

The LM3485 is a high efficiency PFET switching regulator controller that a system designer can use to quickly and easily develop a small, low cost, switching buck regulator for a wide range of applications.

Key Features

  • n Easy to use control methodology n No control loop compensation required Typical.

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LM3485 Hysteretic PFET Buck Controller May 2002 LM3485 Hysteretic PFET Buck Controller General Description The LM3485 is a high efficiency PFET switching regulator controller that a system designer can use to quickly and easily develop a small, low cost, switching buck regulator for a wide range of applications. The use of a hysteretic control scheme provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.