NCP121 datasheet(5/8 Pages) ONSEMI

Part #	NCP121

Description	150 mA, High Accuracy, Very Low Dropout Bias Rail CMOS Voltage Regulator

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP121

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TYPICAL CHARACTERISTICS

At TJ = +25°C, VIN = VOUT(TYP) + 0.3 V, VBIAS = 2.7 V, VEN = VBIAS, VOUT(NOM) = 1.05 V, IOUT = 150 mA,

CIN = 1 mF, CBIAS = 0.1 mF, and COUT = 1 mF (effective capacitance), unless otherwise noted.

Figure 4. VIN Dropout Voltage vs. IOUT and

Temperature TJ

Figure 5. VIN Dropout Voltage vs. (VBIAS −

VOUT) and Temperature TJ

IOUT, OUTPUT CURRENT (mA)

VBIAS − VOUT (V)

100

0

10

20

30

40

50

60

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

20

40

80

100

+125

°C

+25

°C

−40

°C

4.5

60

120

+125

°C

+25

°C

−40

°C

IOUT = 150 mA

Figure 6. VBIAS Dropout Voltage vs. IOUT and

Temperature TJ

Figure 7. BIAS Pin Current vs. IOUT and

Temperature TJ

IOUT, OUTPUT CURRENT (mA)

100

0

800

900

1000

1100

1200

1300

1400

Figure 8. BIAS Pin Current vs. VBIAS and

Temperature TJ

Figure 9. Current Limit vs. (VBIAS − VOUT)

IOUT, OUTPUT CURRENT (mA)

VBIAS (V)

100

0

20

60

80

120

140

5.0

4.5

4.0

5.5

3.5

3.0

2.5

2.0

0

20

60

80

100

140

180

200

+125

°C

+25

°C

−40

°C

40

100

+125

°C

+85

°C

−40

°C

40

120

160

+85

°C

150

50

+85

°C

150

50

+85

°C

+25

°C

150

50

+125

°C

+85

°C

−40

°C

+25

°C

VBIAS − VOUT (V)

4.5

4.0

3.0

2.5

1.5

1.0

0.5

0

100

300

400

500

+125

°C

+25

°C

−40

°C

2.0

3.5

5.0

200

600

+85

°C

160

180

140

200

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