LM2651MTCX-ADJ datasheet(7/10 Pages) NSC

номер детали	LM2651MTCX-ADJ

подробное описание детали	1.5A High Efficiency Synchronous Switching Regulator

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производитель	NSC [National Semiconductor (TI)]

домашняя страница	http://www.national.com

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7 / 10 page

Typical Performance Characteristics (Continued)

Block Diagram

Operation

The LM2651 operates in a constant frequency (300 kHz),

current-mode PWM for moderate to heavy loads; and it auto-

matically switches to hysteretic mode for light loads. In hys-

teretic mode, the switching frequency is reduced to keep the

efficiency high.

Main Operation

When the load current is higher than the sleep mode thresh-

old, the part is always operating in PWM mode. At the begin-

ning of each switching cycle, the high-side switch is turned

on, the current from the high-side switch is sensed and com-

pared with the output of the error amplifier (COMP pin).

When the sensed current reaches the COMP pin voltage

level, the high-side switch is turned off; after 40 ns (dead-

Current Limit vs Junction

Temperature (V

OUT = 3.3V)

DS100925-13

Current Limit vs Input

Voltage (V

OUT = 3.3V)

DS100925-14

DS100925-3

FIGURE 1. LM2651 Block Diagram

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Аналогичный номер детали - LM2651MTCX-ADJ

производитель	номер детали	датащи	подробное описание детали
National Semiconductor ...	LM2651MTCX-ADJ	630Kb / 11P	1.5A High Efficiency Synchronous Switching Regulator
Texas Instruments	LM2651MTCX-ADJ	887Kb / 23P	[Old version datasheet] 1.5 A High-Efficiency Synchronous Switching Regulator
Texas Instruments	LM2651MTCX-ADJ/NOPB	887Kb / 23P	[Old version datasheet] 1.5 A High-Efficiency Synchronous Switching Regulator

производитель	номер детали	датащи	подробное описание детали
National Semiconductor ...	LM2651	630Kb / 11P	1.5A High Efficiency Synchronous Switching Regulator
Texas Instruments	LM2651	966Kb / 20P	[Old version datasheet] 1.5A High Efficiency Synchronous Switching Regulator
National Semiconductor ...	LM2653	243Kb / 13P	1.5A High Efficiency Synchronous Switching Regulator
National Semiconductor ...	LM2653	663Kb / 12P	1.5A High Efficiency Synchronous Switching Regulator
Texas Instruments	LM2653MTCX-ADJ	1Mb / 20P	[Old version datasheet] LM2653 1.5A High Efficiency Synchronous Switching Regulator
Texas Instruments	LM2651	946Kb / 19P	[Old version datasheet] LM2651 1.5A High Efficiency Synchronous Switching Regulator
National Semiconductor ...	LM2655	377Kb / 16P	2.5A High Efficiency Synchronous Switching Regulator
Texas Instruments	LM2655	757Kb / 18P	[Old version datasheet] 2.5A High Efficiency Synchronous Switching Regulator
National Semiconductor ...	LM2655	769Kb / 16P	2.5A High Efficiency Synchronous Switching Regulator
National Semiconductor ...	LM26001	502Kb / 18P	1.5A Switching Regulator with High Efficiency Sleep Mode