5

Rev. 08/13/02

SPX1431 Precision Adjustable Shunt Regulator

© Copyright 2002 Sipex Corporation

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

-60

-30

0

30

60

90

120

0.150

0.125

0.100

0.075

0.050

0.025

0.0

f≤1kHz

Figure 11. Low Frequency Dynamic Output Impedance

VS T

AMBIENT

10

100

1K

10K

100K

1M

10M

START 10.000Hz

STOP 50 000 000.000Hz

REF LEVEL

60.000dB

0.0deg

/DIV

10.000dB

45.000deg

MARKER 19 422

MAG (A/R)

MARKER 19 422

PHASE (A/R)

611.000Hz

-0.125dB

611.000Hz

46.717deg

PHASE

GAIN

Figure 12. Small Signal Gain and Phase VS Frequency;

I

9µF

15kΩ

8.25kΩ

GND

230Ω

Figure 13. Test Circuit for Gain and Phase Frequency

Response

Figure 14. Frequency = 100kHz, I

Figure 15. Test Circuit for Pulse Response

Figure 16. Stability Boundary Conditions

GND

250Ω

50Ω

100

90

80

70

60

50

40

30

20

10

0

C

D

B

A

STABLE

STABLE