LT8608 datasheet(16/35 Pages) AD

16 / 35 page

Data Sheet

LT8641A

analog.com

Rev 0

16 of 35

Figure 40. Transient Response; Load Current Stepped from

1A to 2A

Figure 41. Transient Response; Load Current Stepped from

300mA (Burst Mode Operation) to 1.3A

Figure 42. Start-Up Dropout Performance

Figure 43. Start-Up Dropout Performance

Figure 44. Conducted EMI Performance

Figure 45. Radiated EMI Performance (CISPR25 Radiated

Emission Test with Class 5 Peak Limits)

FRONT PAGE APPLICATION

1A TO 2A TRANSIENT

12VIN, 5VOUT

COUT = 47µF

50µs/DIV

ILOAD

1A/DIV

VOUT

100mA/DIV

FRONT PAGE APPLICATION

300mA (BURST MODE OPERATION) TO

1.3A TRANSIENT

12VIN, 5VOUT

COUT = 47µF

50µs/DIV

ILOAD

1A/DIV

VOUT

200mA/DIV

VIN

2V/DIV

VOUT

2V/DIV

100ms/DIV

2.5Ω LOAD

(2A IN REGULATION)

VOUT

VIN

2V/DIV

VOUT

2V/DIV

100ms/DIV

20Ω LOAD

(250mA IN REGULATION)

VOUT

VIN

EVAL-LT8641A-AZ DEMO BOARD

(WITH EMI FILTER INSTALLED)

14V INPUT TO 5V OUTPUT AT 3.5A,

fSW = 2MHz

CLASS 5 PEAK LIMIT

AMBIENT

SPREAD SPECTRUM MODE

FIXED FREQUENCY

FREQUENCY (MHz)

0.1

100 200

–10

EVAL-LT8641A-AZ DEMO BOARD

(WITH EMI FILTER INSTALLED)

14V INPUT TO 5V OUTPUT AT 3.5A,

fSW = 2MHz

CLASS 5 PEAK LIMIT

AMBIENT

SPREAD SPECTRUM MODE

FIXED FREQUENCY

FREQUENCY (MHz)

0.1

100

–10

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