Datasheet LT8641 (Analog Devices) - 8
| Hersteller | Analog Devices |
| Beschreibung | 65V, 3.5A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current |
| Seiten / Seite | 26 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response; Load Current. … |
| Revision | C |
| Dateiformat / Größe | PDF / 3.4 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Transient Response; Load Current. Stepped from 300mA (Burst Mode. Stepped from 1A to 2A
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LT8641
TYPICAL PERFORMANCE CHARACTERISTICS Transient Response; Load Current Transient Response; Load Current Stepped from 300mA (Burst Mode Stepped from 1A to 2A Operation) to 1.3A
ILOAD ILOAD 1A/DIV 1A/DIV VOUT VOUT 100mA/DIV 200mA/DIV 8641 G38 50µs/DIV 8641 G37 50µs/DIV FRONT PAGE APPLICATION FRONT PAGE APPLICATION 1A TO 2A TRANSIENT 300mA (Burst Mode OPERATION) TO 12VIN, 5VOUT 1.3A TRANSIENT COUT = 47µF 12VIN, 5VOUT COUT = 47µF
Start-Up Dropout Performance Start-Up Dropout Performance
V V IN IN V V IN IN 2V/DIV 2V/DIV V VOUT V OUT V OUT OUT 2V/DIV 2V/DIV 8641 G40 100ms/DIV 8641 G39 100ms/DIV 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 SPREAD SPECTRUM MODE FIXED FREQUENCY MODE –40 0 3 6 9 12 15 18 21 24 27 30 FREQUENCY (MHz) 8641 G41 DC2373A DEMO BOARD (WITH EMI FILTER INSTALLED) 14V INPUT TO 5V OUTPUT AT 3.5A, fSW = 2MHz Rev. C 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Transient Response; Load Current Transient Response; Load Current Stepped from 300mA (Burst Mode Stepped from 1A to 2A Operation) to 1.3A
ILOAD ILOAD 1A/DIV 1A/DIV VOUT VOUT 100mA/DIV 200mA/DIV 8641 G38 50µs/DIV 8641 G37 50µs/DIV FRONT PAGE APPLICATION FRONT PAGE APPLICATION 1A TO 2A TRANSIENT 300mA (Burst Mode OPERATION) TO 12VIN, 5VOUT 1.3A TRANSIENT COUT = 47µF 12VIN, 5VOUT COUT = 47µF
Start-Up Dropout Performance Start-Up Dropout Performance
V V IN IN V V IN IN 2V/DIV 2V/DIV V VOUT V OUT V OUT OUT 2V/DIV 2V/DIV 8641 G40 100ms/DIV 8641 G39 100ms/DIV 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 SPREAD SPECTRUM MODE FIXED FREQUENCY MODE –40 0 3 6 9 12 15 18 21 24 27 30 FREQUENCY (MHz) 8641 G41 DC2373A DEMO BOARD (WITH EMI FILTER INSTALLED) 14V INPUT TO 5V OUTPUT AT 3.5A, fSW = 2MHz Rev. C 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts