MC33341

16

MOTOROLA ANALOG IC DEVICE DATA

Figure 23. 10 V/1.0 A Constant–Voltage Constant–Current Regulator

Figure 24. Output Load Regulation

Figure 23 shows the MC33341 configured as a source high–side constant–voltage constant–current regulator. The regulator is

designed for an output voltage of 10 V at 1.0 A. Figure 24 shows the regulator’s output characteristics as the load is varied.

Source return low–side, load high–side, and load low–side configurations will each exhibit a nearly identical load regulation

characteristic. A heatsink is required for the MTP2955 series pass element.

11.1 k

Variable

Resistive

Load

82.5 k

0.01

V

I

Output

Ground

87

6

5

12

3

4

R

R

R

R

R

VCC

VCC

VCC

VCC

VCC

VCC

0.4 V

1.2 V

R

0.2 V

VCC

0.2 V 0.4 V 1.2 V

VCC

1.2 V

VCC

Inverting Amp

Transconductance

Amp

Differential Amp

Disable Logic

Differential Amp

Vsen

Vth

Isen

Ith

Reference

0

10

IO, OUTPUT LOAD CURRENT (A)

0.2

0 4

0.6

0.8

1.0

8.0

6.0

4.0

2.0

0

10

3.0 k

10

0.2

MTP2955

Output

10 V/1.0 A

Input

Ground

Input

12 V to 16 V