7

Date: 1/19/05

SPX431A,B,C Precision Adjustable Shunt Regulator

© Copyright 2005 Sipex Corporation

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

Figure 21. Constant Current, Sink, I

Figure 22. Reference Amplifier for Isolated Feedback in

Off-Line DC-DC Converters

Figure 23. Precision High Current Series Regulator

V

Figure 24. High Current Shunt regulator

V

Figure 25. Single Supply Comparator with Temperature

Compensated Threshold. V

Q1

R2

R1

0.1%

SPX431A,B,C

R2

0.1%

R3

R1

0.1%

SPX431A,B,C

C2

C1

Isolated

Feedback

+

R3 sets feedback gain,

C1 provides feedback

compensation

Opto Isolator

R1

0.1%

SPX431A,B,C

R3

R2

0.1%

C1

R5

R4

R1

0.1%

SPX431A,B,C

R3

R2

0.1%

Q1

R2

SPX431A,B,C

R1

* Resistor values are chosen such that the effect to

I