4

Typical performance

Figure 2. Power gain and efficiency vs output power and

Idq (VDD = 28 V, fo = 945 MHz)

20

30

40

50

60

70

80

90

13

14

15

16

17

18

19

20

0

10

20

30

40

50

60

70

80

90

Output Power (W)

Idq = 100 mA

Idq = 200 mA

Idq = 300 mA

Idq = 400 mA

Idq = 500 mA

Idq = 600 mA

Idq = 100mA Eff

Idq = 200mA Eff

Idq = 300mA Eff

Idq = 400mA Eff

Idq = 500mA Eff

Idq = 600mA Eff

Figure 3. Power gain and efficiency vs output power and

VDD (Idq = 300 mA, fo = 945 MHz tuned at VDD = 28 V)

20

30

40

50

60

70

80

90

13

14

15

16

17

18

19

20

0

20

40

60

80

100

120

Output Power (W)

Vdd = 20V

Vdd = 22V

Vdd = 24V

Vdd = 26V

Vdd = 28V

Vdd = 30V

Vdd = 32V

Vdd = 20V Eff

Vdd = 22V Eff

Vdd = 24V Eff

Vdd = 26V Eff

Vdd = 28V Eff

Vdd = 30V Eff

Vdd = 32V Eff

Figure 4. Output power and efficiency vs VDD and input

power (Idq = 300 mA, fo = 945 MHz tuned at VDD = 28 V)

10

20

30

40

50

60

70

80

90

100

10

20

30

40

50

60

70

80

90

100

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

Vdd (V)

Pin = .25W

Pin = .5W

Pin = 1.0W

Pin = 2.0W

Pin = 2.5W

Pin = .25W Eff

Pin = .5W Eff

Pin = 1.0W Eff

Figure 5. Output power and drain current vs VDD and

input power (Idq = 300 mA, fo = 945 MHz tuned at VDD = 28

V)

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

10

20

30

40

50

60

70

80

90

100

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

Vdd (V)

Pin = .25W

Pin = .5W

Pin = 1.0W

Pin = 2.0W

Pin = 2.5W

Pin = .25W Idd

Pin = .5W Idd

Pin = 1.0W Idd

Figure 6. Output power and drain current vs VGS and input

power (VDD = 28 V, fo = 945 MHz)

0

0.5

1

1.5

2

2.5

3

3.5

4

0

10

20

30

40

50

60

70

80

0

0.5

1

1.5

2

2.5

3

3.5

4

Vgs V)

Pin = .25W

Pin = .5W

Pin = 1.0W

Pin = 1.5W

Pin = 2.0W

Pin = .25W Idd

Pin = .5W Idd

Pin = 1.0W Idd

Pin = 1.5W Idd

Pin = 2.0W Idd

Figure 7. Output power vs VGS and input power (VDD = 28

V, fo = 945 MHz)

0

10

20

30

40

50

60

70

80

0

0.5

1

1.5

2

2.5

3

3.5

4

Vgs(V)

Pin = .25W

Pin = .5W

Pin = 1.0W

Pin = 1.5W

Pin = 2.0W

ST9045C

Typical performance

DS11524 - Rev 3

page 5/13