Datasheet LT8640, LT8640-1 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | 42V, 5A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current |
| Pages / Page | 30 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response; Load Current. … |
| Revision | D |
| File Format / Size | PDF / 1.8 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response; Load Current. Stepped from 100mA (Burst Mode. Stepped from 1A to 2A
Model Line for this Datasheet
- LT8640EUDC#PBF LT8640EUDC#TRPBF LT8640EUDC-1#PBF LT8640EUDC-1#TRPBF LT8640EUDCF#PBF LT8640EUDCF#TRPBF LT8640EUDCF-1#PBF LT8640EUDCF-1#TRPBF LT8640HUDC#PBF LT8640HUDC#TRPBF LT8640HUDC-1#PBF LT8640HUDC-1#TRPBF LT8640HUDCF#PBF LT8640HUDCF#TRPBF LT8640IUDC#PBF LT8640IUDC#TRPBF LT8640IUDC-1#PBF LT8640IUDC-1#TRPBF LT8640IUDCF#PBF LT8640IUDCF#TRPBF LT8640IUDCF-1#PBF LT8640IUDCF-1#TRPBF LT8640JUDCF#PBF LT8640JUDCF#TRPBF LT8640JUDCF#WPBF LT8640JUDCF#WTRPBF LT8640JUDCF-1#PBF LT8640JUDCF-1#TRPBF LT8640JUDCF-1#WPBF LT8640JUDCF-1#WTRPBF
Text Version of Document
LT8640/LT8640-1
TYPICAL PERFORMANCE CHARACTERISTICS Transient Response; Load Current Transient Response; Load Current Stepped from 100mA (Burst Mode Stepped from 1A to 2A Operation) to 1.1A
IL IL 1A/DIV 1A/DIV VOUT VOUT 100mV/DIV 200mV/DIV 50µs/DIV 8640 G37 50µs/DIV 8640 G38 FRONT PAGE APPLICATION FRONT PAGE APPLICATION 1A TO 2A TRANSIENT 100mA (Burst Mode OPERATION) TO 12VIN, 5VOUT 1.1A TRANSIENT COUT = 47µF 12VIN, 5VOUT COUT = 47µF
Start-Up Dropout Performance Start-Up Dropout Performance
VIN VIN VIN VIN 2V/DIV 2V/DIV V V V OUT OUT OUT VOUT 2V/DIV 2V/DIV 100ms/DIV 8640 G39 100ms/DIV 8640 G40 2.5Ω LOAD 20Ω LOAD (2A IN REGULATION) (250mA IN REGULATION)
Conducted EMI Performance
60 50 40 30 20 10 0 AMPLITUDE (dBµV) -10 -20 -30 FIXED FREQUENCY MODE SPREAD SPECTRUM MODE -40 0 3 6 9 12 15 18 21 24 27 30 FREQUENCY (MHz) 8640 G41 DC2202A DEMO BOARD (WITH EMI FILTER INSTALLED) 14V INPUT TO 5V OUTPUT AT 4A, fSW = 2MHz Rev. D For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Transient Response; Load Current Transient Response; Load Current Stepped from 100mA (Burst Mode Stepped from 1A to 2A Operation) to 1.1A
IL IL 1A/DIV 1A/DIV VOUT VOUT 100mV/DIV 200mV/DIV 50µs/DIV 8640 G37 50µs/DIV 8640 G38 FRONT PAGE APPLICATION FRONT PAGE APPLICATION 1A TO 2A TRANSIENT 100mA (Burst Mode OPERATION) TO 12VIN, 5VOUT 1.1A TRANSIENT COUT = 47µF 12VIN, 5VOUT COUT = 47µF
Start-Up Dropout Performance Start-Up Dropout Performance
VIN VIN VIN VIN 2V/DIV 2V/DIV V V V OUT OUT OUT VOUT 2V/DIV 2V/DIV 100ms/DIV 8640 G39 100ms/DIV 8640 G40 2.5Ω LOAD 20Ω LOAD (2A IN REGULATION) (250mA IN REGULATION)
Conducted EMI Performance
60 50 40 30 20 10 0 AMPLITUDE (dBµV) -10 -20 -30 FIXED FREQUENCY MODE SPREAD SPECTRUM MODE -40 0 3 6 9 12 15 18 21 24 27 30 FREQUENCY (MHz) 8640 G41 DC2202A DEMO BOARD (WITH EMI FILTER INSTALLED) 14V INPUT TO 5V OUTPUT AT 4A, fSW = 2MHz Rev. D For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
