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LM2657

National Semiconductor
Part Number LM2657
Manufacturer National Semiconductor
Description Dual Synchronous Buck Regulator Controller
Published Mar 22, 2005
Detailed Description LM2657 Dual Synchronous Buck Regulator Controller January 2005 LM2657 Dual Synchronous Buck Regulator Controller Gener...
Datasheet PDF File LM2657 PDF File

LM2657
LM2657

Overview
LM2657 Dual Synchronous Buck Regulator Controller January 2005 LM2657 Dual Synchronous Buck Regulator Controller General Description The LM2657 is an adjustable 200kHz-500kHz dual channel voltage-mode controlled high-speed synchronous buck regulator controller ideally suited for high current applications.
The LM2657 requires only N-channel FETs for both the upper and lower positions of each 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.
Lossless current limiting without the use of external sense resistors is made possible by sensin...


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