MC33761SNT1-028G Ver la hoja de datos (PDF) - ON Semiconductor

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MC33761SNT1-028G

Ultra Low−Noise Low Dropout Voltage Regulator with 1.0 V ON/OFF Control

ON Semiconductor 

MC33761

MC33761 Has a Fast Start−Up Phase

Thanks to the lack of bypass capacitor the MC33761 is

able to supply its downstream circuitry as soon as the OFF

to ON signal appears. In a standard LDO, the charging time

of the external bypass capacitor hampers the response time.

A simple solution consists in suppressing this bypass

element but, unfortunately, the noise rises to an

unacceptable level. MC33761 offers the best of both worlds

since it no longer includes a bypass capacitor and starts in

less than 40 ms typically (Repetitive at 200 Hz). It also

ensures a low−noise level of 40 mVRMS 100 Hz−100 kHz.

The following picture details the typical 33761 start−up

phase.

Figure 12. Repetitive Start−Up Waveforms

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