LP2950 datasheet(8/22 Pages) ONSEMI

Part #	LP2950

Description	100 mA, Low Power Low Dropout Voltage Regulator

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Manufacturer	ONSEMI [ON Semiconductor]

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LP2950, LP2951, NCV2951

http://onsemi.com

8

1

0

100

4.0

-40

1.8

1.0

80

Vin, INPUT VOLTAGE (V)

f, FREQUENCY (Hz)

t, TEMPERATURE (

C)

f, FREQUENCY (Hz)

TA = 25C

CL = 1.0 mF

Vin = 6.0 V

Vout = 5.0 V

CL = 1.0 mF

CL = 100 mF

IL= 0.1 mA

IL= 100 mA

TA = 25C

VO = 5.0 V

LP2951C

Output “Off"

Output “On"

TA = 25C

LP2951CN

60

40

20

0

3.0

2.0

1.0

0

80

60

40

20

0

1.4

1.0

0.8

1.2

1.6

10

100

1.0 k

10 k

100 k

1.0 k

10 k

100 k

-20

40

80

120

160

5.0

15

25

35

40

10

20

30

60

100

140

20

0

TA = 75C

4.0

2.0

0

-2.0

-4.0

-6.0

0.01

0.1

10

100

1000

10000

0

10

20

3040

50

60708090

100

Output Current (mA)

Unstable Region

Stable Region

Unstable Region for 0.1

mF capacitor only

100

mF

0.1

mF

Vout = 5 V

Lower unstable region is for 0.1

mF only.

1

mF and 100 mF show no instability with low ESR values.

0

200

t, TIME (ms)

Figure 12. Load Transient Response

4

2.5

0.5

1.5

2

3

3.5

1

150

100

0

-50

50

Vout

ILoad

0

-200

200

400

-400

CL = 1.0 mF

Vout = 5.0 V

IL = 400 mA to 75 mA

TA = 25C

Figure 13. Ripple Rejection

Figure 14. Output Noise

Figure 15. Shutdown Threshold Voltage

versus Temperature

Figure 16. Maximum Rated

Output Current

Figure 17. Output Stability versus Output Capacitor

Change

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