Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

LP2950/LP2951

PARAMETER

CONDITIONS

(Note 2)

LP2950AC

LP2951AC

Min.

Typ.

Max.

LP2950C

LP2951C

Min.

Typ.

Max.

Units

Output Noise,

10Hz to 100KHz

CL = 1µF

CL = 200 µF

CL = 13.3 µF

(Bypass = 0.01

µF pins 7 to

1(LP2951))

430

160

100

430

160

100

µV rms

µV rms

µV rms

8-Pin Versions only

LP2951AC

LP2951C

Reference Voltage

1.22

1.235

1.25

1.21

1.235

1.26

V

Reference Voltage

Over Temperature (Note 7)

1.19

1.27

1.185

1.285

V

Feedback Pin Bias Current

40

60

40

60

nA

Reference Voltage Temperature

Coefficient

( Note 12 )

20

50

ppm/°C

Feedback Pin Bias Current

Temperature Coefficient

0.1

0.1

nA/°C

Error Comparator

Output Leakage Current

V

OH

= 30V

0.01

1

0.01

1

µA

Output Low Voltage

Vin = 4.5V

IOL = 400µA

150

250

150

250

mV

Upper Threshold Voltage

(Note 6)

40

60

40

60

mV

Lower Threshold Voltage

(Note 6)

75

95

75

95

mV

Hysteresis

(Note 6)

15

15

mV

Shutdown Input

Input logic Voltage

Low (Regulator ON)

High (Regulator OFF)

2

1.3

0.7

2

1.3

0.7

V

V

Shutdown Pin Input Current

(Note 3)

Vs = 2.4V

Vs = 30V

30

450

50

600

30

450

50

600

µA

µA

Regulator Output Current in

Shutdown (Note 3)

(Note 11)

3

10

3

10

µA

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the

device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the

Electrical Characteristics tables.

µA and C

µF for 5V versions and 2.2µF for 3V and 3.3V versions.

°C

≤ 0.8V.

Note 3: Guaranteed and 100% production tested.

Note 4: Guaranteed but not 100% production tested. These limits are not used to calculate outgoing AQL levels.

Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V differential.

At very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account.

Note 6: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at

at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds remain constant

≤V

out

≤ (V

≤V

in

≤30V, 100µA≤I

L

≤ 100 mA, T

J

≤ T

Note 8: The junction-to-ambient thermal resistance are as follows:180

°C/W and 160°C/W for the TO-92 (N) package with 0.40 inch and 0.25 inch leads to the

printed circuit board (PCB) respectively, 105

°C/W for the molded plastic DIP (P) and 160°C/W for the molded plastic SO-8 (S). The above thermal resistances for

the N, S and P packages apply when the package is soldered directly to the PCB.

Note 9: May exceed input supply voltage.

Note 10: When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-clamped to

ground.

≥ 2V, V

in

≤ 30V, V

Note 12: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.