Datasheet Texas Instruments LM2647LQ/NOPB — 数据表

LM2647
www.ti.com SNVS210F – JUNE 2003 – REVISED APRIL 2013 LM2647 Dual Synchronous Buck Regulator Controller
Check for Samples: LM2647 FEATURES DESCRIPTION The LM2647 is an adjustable 200-500kHz dual
channel
voltage-mode
controlled
high-speed
synchronous buck regulator controller ideally suited
for battery powered applications such as laptop and
notebook computers. The LM2647 requires only Nchannel FETs for both the upper and lower positions
of each synchronous stage. It features line
feedforward to improve the response to input
transients. At very light loads, the user can choose
between the high-efficiency Pulse-skip mode or the
constant frequency Forced-PWM mode. Lossless
current limiting without the use of external sense
resistors 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 …