0

200

400

600

800

1000

0

10

20

30

40

50

FREQUENCY (MHz)

Class A Limit

Class B Limit

Horiz Peak

Horiz Quasi-Peak

0

1

2

3

4

5

0

10

20

30

40

50

60

70

80

90

100

0

1

2

3

4

5

OUTPUT CURRENT (A)

30 40 50 60 70 80 90 100 110 120 130

0

1

2

3

4

5

6

AMBIENT TEMPERATURE (°C)

JA=12°C/W

LMZ22005

SNVS686J – MARCH 2011 – REVISED AUGUST 2015

www.ti.com

determined.

8.2.3 Application Curves

Figure 49. Efficiency

Figure 50. Thermal Derating Curve

Figure 51. Radiated EMI (EN 55022) of Demo Board (See AN-2125)

9 Power Supply Recommendations

The LMZ22005 device is designed to operate from an input voltage supply range between 6 V and 20 V. This

input supply must be well regulated and able to withstand maximum input current and maintain a stable voltage.

The resistance of the input supply rail must be low enough that an input current transient does not cause a high

enough drop at the LMZ22005 supply voltage that can cause a false UVLO fault triggering and system reset. If

the input supply is more than a few inches from the LMZ22005, additional bulk capacitance may be required in

addition to the ceramic bypass capacitors. The amount of bulk capacitance is not critical, but a 47-

μF or 100-μF

electrolytic capacitor is a typical choice.

22

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