Advanced Monolithic Systems, Inc.

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

LP2950/LP2951

Note 13: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation

Note 14: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are

covered under the specification for thermal regulation.

Note 15: Line regulation for the LP2951 is tested at 150

°C for I

µA and T

°C, line regulation is guaranteed by design to 0.2%. See

typical performance characteristics for line regulation versus temperature and load current.

Note 16: All LP2950 devices have the nominal output voltage coded as the last two digits of the part number. In the LP2951 products, the 3.0V and 3.3V versions

are designated by the last two digits, but the 5V version is denoted with no code of the part number.

BLOCK DIAGRAM AND TYPICAL APPLICATIONS

LP2950-XX

LP2951-XX

INPUT

OUTPUT

GROUND

ERROR

AMPLIFIER

1.23V

REFERENCE

UNREGULATED DC

V

OUT

I

SEE APPLICATION

HINTS

+

+

+

+

-

INPUT

OUTPUT

GROUND

ERROR

AMPLIFIER

1.23V

REFERENCE

UNREGULATED DC

V

OUT

I

SEE APPLICATION

HINTS

+

+

+

+

-

FEED-

BACK

SHUT-

DOWN

SENSE

V

TAP

ERROR

TO CMOS

OR TTL

+

-

+

330k

Ω

4

5

6

2

1

8

7

3

FROM

CMOS

OR TTL

50mV

ERROR DETECTION COMPARATOR