0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

−5.6

−2.8

0

2.8

5.6

8.4

11.2

14.1

16.9

19.7

22.5

Output Voltage (V)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

−11.2

−8.4

−5.6

−2.8

0

2.8

5.6

8.4

11.2

14.1

16.9

Output Inductance (µH)

200

350

500

650

800

950

1100 1250 1400 1550

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

−11.4

−8.6

−5.7

−2.9

0.0

2.9

5.7

8.6

11.4

14.3

17.2

Switching Frequency (kHz)

3

5

7

9

11

13

15

17

19

21

23

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

−11.4

−8.6

−5.7

−2.9

0.0

2.9

5.7

8.6

11.4

14.3

17.1

Input Voltage (V)

6

CSD87331Q3D

SLPS283B – SEPTEMBER 2011 – REVISED FEBRUARY 2017

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Product Folder Links: CSD87331Q3D

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Copyright © 2011–2017, Texas Instruments Incorporated

Typical Power Block Device Characteristics (continued)

Test conditions: VIN = 12 V, VDD = 5 V, ƒSW = 500 kHz, VOUT = 1.3 V, LOUT = 1 µH, IOUT = 15 A, TJ = 125°C, unless stated

otherwise.

Figure 6. Normalized Power Loss vs Switching Frequency

Figure 7. Normalized Power Loss vs Input Voltage

Figure 8. Normalized Power Loss vs Output Voltage

Figure 9. Normalized Power Loss vs Output Inductance