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LM27241 - Synchronous Buck Regulator Controller

Description

The LM27241 is an adjustable 200kHz-500kHz single channel voltage-mode controlled high-speed synchronous buck regulator controller.

It is ideally suited for battery powered applications such as laptop and notebook computers.

Features

  • line feedforward to improve the response to input transients. At very light loads, the user can choose between the highefficiency Pulse-skip mode or the constant frequency Forced-PWM mode. Lossless current limiting without the use of external sense resistor is made possible by sensing the voltage drop across the bottom FET. A unique adaptive duty cycle clamping technique is incorporated to significantly reduce peak currents under abnormal load conditions. The input voltage range is 5.5V to 28V w.

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Datasheet preview – LM27241

Datasheet Details

Part number LM27241
Manufacturer National Semiconductor
File Size 1.24 MB
Description Synchronous Buck Regulator Controller
Datasheet download datasheet LM27241 Datasheet
Additional preview pages of the LM27241 datasheet.

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LM27241 Synchronous Buck Regulator Controller for Mobile Systems May 2005 LM27241 Synchronous Buck Regulator Controller for Mobile Systems General Description The LM27241 is an adjustable 200kHz-500kHz single channel voltage-mode controlled high-speed synchronous buck regulator controller. It is ideally suited for battery powered applications such as laptop and notebook computers. The LM27241 requires only N-channel FETs for both the upper and lower positions of the synchronous stage. It features line feedforward to improve the response to input transients. At very light loads, the user can choose between the highefficiency Pulse-skip mode or the constant frequency Forced-PWM mode.
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