NCP508 datasheet(3/15 Pages) ONSEMI

Part #	NCP508

Description	Very Low Noise, Fast Turn On, 50 mA Low Dropout Voltage Regulator

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP508

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ELECTRICAL CHARACTERISTICS (Vin = Vout(nom) + 1.0 V, Venable = Vin, Cin = 1.0 mF, Cout = 1.0 mF, TJ = 25°C, unless otherwise

noted)

Characteristic

Symbol

Min

Typ

Max

Unit

Output Voltage Tolerance (TA = 25°C, Iout = 10 mA)

Vout

−2

−

+2

%

Output Voltage Tolerance (TA = −40°C to 85°C, Iout = 10 mA)

Vout

−3

−

+3

%

Line Regulation (Vin = Vout + 1 V to 12 V, Iout = 10 mA) (Note 5)

Regline

−

2

20

mV

Load Regulation (Iout = 1.0 mA to 50 mA) (Note 5)

Regload

−

6

40

mV

Output Current (Vout = Vout(nom) – 0.1 V)

Iout(nom)

50

−

mA

Dropout Voltage (Vout = 3.0 V, Measured at Vout – 100 mV)

Iout = 30 mA

Iout = 40 mA

Iout = 50 mA

Vin−Vout

−

140

155

180

250

300

−

mV

Quiescent Current

(Enable Input = 0V)

IQ

−

0.1

1

mA

Ground Current

(Enable Input = Vin, Vin = Vout + 1 V, Iout = 0 mA)

(Enable Input = Vin, Iout = 1 mA)

(Enable Input = Vin, Iout = 10 mA)

(Enable Input = Vin, Iout = 50 mA)

IGND

−

145

160

300

1100

200

260

500

1900

mA

Enable Input Threshold Voltage

(Voltage Increasing, Output Turns On, Logic High)

(Voltage Decreasing, Output Turns Off, Logic Low)

Vth(en)

0.9

−

0.15

V

Enable Input Current (Venable = 2.4 V)

Ienable

−

8.0

15

mA

Output Turn On Time (Note 6)

−

20

−

ms

Output Short Circuit Current Limit (Vout = 0 V)

Iout(max)

100

250

−

mA

Ripple Rejection (Vin = Vout(nom) + 1 Vdc + 0.5 Vpp, f = 1 kHz, Io = 10 mA)

RR

−

70

−

dB

Output Noise Voltage (f = 100 Hz to 100 kHz) (Vout = 1.5 V)

Vn

−

39

−

mVrms

5. Low duty cycle pulse techniques are used during testing to maintain the junction temperature as close to ambient as possible.

6. Turn on time is defined from Enable at 10% to Vout at 95% nominal value. Min and max values TA = −40°C to 85°C, Tjmax = 125°C. Venable

= 0 V to Vin. Cout = 1.0 mF.

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