NCP500SQL30T1 datasheet(16/20 Pages) ONSEMI

Il numero della parte	NCP500SQL30T1

Spiegazioni elettronici	150 mA CMOS Low Noise Low-Dropout Voltage Regulator

PDF	20 Pages

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Produttore elettronici	ONSEMI [ON Semiconductor]

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NCP500

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Output

Input

1.0

5.6 V

A regulated output can be achieved with input voltages that ex-

ceed the 6.0 V maximum rating of the NCP500 series with the

addition of a simple pre−regulator circuit. Care must be taken

to prevent Q1 from overheating when the regulated output

(Vout) is shorted to Gnd.

Output

Input

1.0

Output

Enable

1.0

2.5

110

Time (ms)

1.5

0.5

100

TA = 25°C

Vin = 3.4 V

Vout = 2.8 V

R = 1.0 M

C = 1.0

R = 1.0 M

C = 0.1

No Delay

If a delayed turn−on is needed during power up of several volt-

ages then the above schematic can be used. Resistor R, and

capacitor C, will delay the turn−on of the bottom regulator. A

few values were chosen and the resulting delay can be seen in

Figure 33.

The graph shows the delay between the enable signal and

output turn−on for various resistor and capacitor values.

Figure 32. Delayed Turn−on

Figure 33. Delayed Turn−on

Figure 34. Input Voltages Greater than 6.0 V

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