Rev. 10/30/00

SPX2937

°C.

PARAMETER

CONDITIONS

SPX2937-10

Min

Typ

Max

SPX2937-12

Min

Typ

Max

SPX2937-15

Min

Typ

Max

UNITS

Output Voltage

5mA

9.70

9.50

10.0

10.3

10.5

11.64

11.40

12.0

12.36

12.60

14.55

14.25

15.0

15.45

15.75

V

Line Regulation

30

100

36

120

45

150

mV

Load Regulation

5mA

10

100

12

120

15

150

mV

Dropout Voltage

0.5

250

1.0

110

0.5

250

1.0

110

0.5

250

1.0

mV

V

Quiescent Current

2

10

10

20

2

10

10

20

2

10

10

20

mA

mA

Output Noise

Voltage

10Hz- 100kHz

300

360

450

Long Term

Stability

51

45

63

44

56

mV/ 1000Hr

Short Circuit

Current

1.0

0.6

1.0

0.6

1.0

0.6

A

Maximum Line

Transient

Ω

T

≤ 100ms

60

75

60

75

60

75

V

Reverse Polarity

DC Input Voltage

Ω

-15

-15

-30

-30

-15

-15

-30

-30

-15

-15

-30

-30

V

Reverse Polarity

Transient Input

Voltage

Ω

T

≤ 100ms

-50

-75

-50

-75

-50

-75

V

APPLICATION HINTS

EXTERNAL CAPACITORS

The stability of the SPX2937 requires a 10

µF or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most

types of tantalum or aluminum electrolytic works fine here. For operations below -25

°C solid tantalum is recommended since the many aluminum

types have electrolytes that freeze at about -30

°C. The ESR of about 5Ω or less and resonant frequency above 500 kHz are the most important

parameters in the value of the capacitor. The capacitor value may be increased without limit.

At lower values of output current, less output capacitance is required for stability. For the currents below 10mA the value of the capacitor can be

reduced to 22

µF and 0.15µF for 1mA.