Advanced Monolithic Systems, Inc.

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

AMS2950/AMS2951

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.

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

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 AMS2951 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 AMS2950 devices have the nominal output voltage coded as the last two digits of the part number. In the AMS2951 products, the 2.5V 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

AMS2950-XX

AMS2951-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