LM46000PWPR datasheet(11/56 Pages) TI2

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Quasi Peak Limit

Average Limit

Frequency (MHz)

dBuV

100

0.15

Measured Peak Emissions

Quasi Peak Limit

Average Limit

Frequency (MHz)

dBuV

100

0.15

Measured Peak Emissions

EN 55022 Class B Limit

Frequency (MHz)

dBuV

Evaluation Board Emissions

1000

100

Vertical Polarization

Horizontal Polarization

EN 55022 Class B Limit

Frequency (MHz)

dBuV

Evaluation Board Emissions

1000

100

Vertical Polarization

Horizontal Polarization

10000

100000

1000000

3.4

3.6

3.8

4.0

4.2

4.4

4.6

4.8

5.0

VIN (V)

Load = 0.01 A

Load = 0.1 A

Load = 0.5 A

C001

10000

100000

1000000

5.0

5.2

5.4

5.6

5.8

6.0

6.2

6.4

6.6

6.8

7.0

VIN (V)

Load = 0.01 A

Load = 0.1 A

Load = 0.5 A

C001

LM46000

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SNVSA45B – JUNE 2014 – REVISED MARCH 2018

Product Folder Links: LM46000

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Typical Characteristics (continued)

Unless otherwise specified, VIN = 24 V, VOUT = 3.3 V, FS = 500 kHz, L = 27 µH, COUT = 100 µF, CFF = 33 pF. See Application

Performance Curves for Bill of Materials (BOM) for other VOUT and FS combinations.

VOUT = 3.3 V

FS = 500 kHz

Figure 19. Switching Frequency vs VIN in Dropout Operation

VOUT = 5 V

FS = 1 MHz

Figure 20. Switching Frequency vs VIN in Dropout Operation

VOUT = 3.3 V

FS = 500 kHz

IOUT = 0.5 A

Measured on the LM46000PWPEVM with default BOM. No input

filter used.

Figure 21. Radiated EMI Curve

VOUT = 5 V

FS = 500 kHz

IOUT = 0.5 A

Measured on the LM46000PWPEVM with L = 44 µH, COUT = 66

µF, CFF = 33 pF. No input filter used.

Figure 22. Radiated EMI Curve

VOUT = 3.3 V

FS = 500 kHz

IOUT = 0.5 A

Measured on the LM46000PWPEVM with default BOM. EVM input

filter: Lin = 1 µH Cd = 47 µF CIN4 = 68 µF

Figure 23. Conducted EMI Curve

VOUT = 5 V

FS = 500 kHz

IOUT = 0.5 A

Measured on the LM46000PWPEVM with L = 44 µH, COUT = 66

µF, CFF = 33 pF. EVM input filter Lin = 1 µH Cd = 47 µF CIN4 = 68

µF

Figure 24. Conducted EMI Curve

LM46000PWPR Datasheet(PDF) 11 Page - Texas Instruments

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