3

Date: 12/9/05

SPX2954, 250mA Low Dropout Voltage Regulator

© Copyright 2005 Sipex Corporation

NOTE

2), T

by the total temperature range.

Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output sense

(V

Changes in output voltage due to heating effects are covered under the specification for thermal

regulation.

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.

the nominal reference voltage measured at 6V input. To express these thresholds in terms of output

voltage change, multiply by the error amplifier gain = V

For example, 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 as a percent of V

dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.

SPX2954A

SPX2954

PARAMETER

CONDITIONS

MIN.

TYP.

MAX

MIN.

TYP. MAX.

UNIT

Error Comparator

Output Leakage Current

0.01

1

0.01

1

µA

Output Low Voltage

150

250

150

250

mV

Upper Threshold Voltage

40

60

40

60

mV

Lower Threshold Voltage

75

95

75

95

mV

Hysteresis

15

15

mV

Shutdown

Input logic Voltage

Low (Regulator ON)

1.3

0.7

1.3

0.7

V

High (Regulator OFF)

2.0

2.0

Shutdown Input Current

VS = 2.4V

30

50

30

50

µA

VS= 30V

400

800

400

800

Regulator Output Current

3

10

3

10

µA

in Shutdown

Thermal Resistance Θ

Θ

Θ

Θ

TO-263-3

31.4

°C/W

SOIC-8

128.4

°C/W

TO-92-3

131.9

°C/W

SOT-223

62.3

°C/W

TO-220-3

29.4

°C/W