NCP623DM datasheet(7/14 Pages) ONSEMI

Part #	NCP623DM

Description	Ultra Low Noise 150 mA Low Dropout Voltage Regulator with ON/OFF Control

PDF	14 Pages

Scroll/Zoom	100%

Manufacturer	ONSEMI [ON Semiconductor]

Direct Link	http://www.onsemi.com

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7 / 14 page

NCP623

http://onsemi.com

Figure 6. NCP623 Wake−up Improvement with Small PNP Transistor

1 ms

NCP623 Without

Wake−up Improvement

(Typical Response)

NCP623 With

Wake−up Improvement

(Typical Response)

The PNP being wired upon the bypass pin, it shall not

degrade the noise response of the NCP623. Figure 7

confirms the good behavior of the integrated circuit in this

area which reaches a typical noise level of 26

mVRMS

(100 Hz to 100 kHz) at Iout = 60 mA.

Frequency (Hz)

100

1,000

350

200

150

100

1,000,000

10,000

Figure 7. Noise Density of the NCP623 with a 10 nF

Bypass Capacitor and a Wake−up Improvement Network

100,000

250

300

Cbyp = 10 nF

Vin = 3.8 V

Vout = 2.8 V

Co = 1.0 mF

Iout = 60 mA

Tamb = 25°C

Output Noise = 26

mVrms C =

10 nF @ 100 Hz − 100 kHz

NCP623DM Datasheet(PDF) 7 Page - ON Semiconductor