Datasheet LT8645S, LT8646S (Analog Devices) - 10
| Hersteller | Analog Devices |
| Beschreibung | 65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5μA Quiescent Current |
| Seiten / Seite | 30 / 10 — TYPICAL PERFORMANCE CHARACTERISTICS. LT8645S Transient Response;. LT8646S … |
| Revision | B |
| Dateiformat / Größe | PDF / 2.4 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. LT8645S Transient Response;. LT8646S Transient Response;. Internal Compensation
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LT8645S/LT8646S
TYPICAL PERFORMANCE CHARACTERISTICS LT8645S Transient Response; LT8646S Transient Response; Internal Compensation Internal Compensation External Compensation
ILOAD ILOAD 2A/DIV 2A/DIV VOUT VOUT 100mV/DIV 100mV/DIV 20µs/DIV 8645S G43 20µs/DIV 8645S G44 2A TO 4A TRANSIENT 2A TO 4A TRANSIENT 12VIN, 5VOUT, fSW = 2MHz 12VIN, 5VOUT, fSW = 2MHz COUT = 100µF, CLEAD = 4.7pF CC = 330pF, RC = 7.5k COUT = 100µF, CLEAD = 4.7pF
LT8645S Transient Response; LT8646S Transient Response; 300mA (Burst Mode Operation) to 300mA (Burst Mode Operation) to 1.3A Transient to 1.3A Transient 1.3A Transient
ILOAD ILOAD 1A/DIV 1A/DIV VOUT VOUT 100mV/DIV 100mV/DIV 50µs/DIV 8645S G45 50µs/DIV 8645S G46 300mA TO 1.3A TRANSIENT 300mA TO 1.3A TRANSIENT 12VIN, 5VOUT, fSW = 2MHz 12VIN, 5VOUT, fSW = 2MHz COUT = 100µF, CLEAD = 4.7pF CC = 330pF, RC = 7.5k COUT = 100µF, CLEAD = 4.7pF
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 8645S G47 100ms/DIV 8645S G48 2.5Ω LOAD 20Ω LOAD (2A IN REGULATION) (250mA IN REGULATION) Rev. B 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS LT8645S Transient Response; LT8646S Transient Response; Internal Compensation Internal Compensation External Compensation
ILOAD ILOAD 2A/DIV 2A/DIV VOUT VOUT 100mV/DIV 100mV/DIV 20µs/DIV 8645S G43 20µs/DIV 8645S G44 2A TO 4A TRANSIENT 2A TO 4A TRANSIENT 12VIN, 5VOUT, fSW = 2MHz 12VIN, 5VOUT, fSW = 2MHz COUT = 100µF, CLEAD = 4.7pF CC = 330pF, RC = 7.5k COUT = 100µF, CLEAD = 4.7pF
LT8645S Transient Response; LT8646S Transient Response; 300mA (Burst Mode Operation) to 300mA (Burst Mode Operation) to 1.3A Transient to 1.3A Transient 1.3A Transient
ILOAD ILOAD 1A/DIV 1A/DIV VOUT VOUT 100mV/DIV 100mV/DIV 50µs/DIV 8645S G45 50µs/DIV 8645S G46 300mA TO 1.3A TRANSIENT 300mA TO 1.3A TRANSIENT 12VIN, 5VOUT, fSW = 2MHz 12VIN, 5VOUT, fSW = 2MHz COUT = 100µF, CLEAD = 4.7pF CC = 330pF, RC = 7.5k COUT = 100µF, CLEAD = 4.7pF
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 8645S G47 100ms/DIV 8645S G48 2.5Ω LOAD 20Ω LOAD (2A IN REGULATION) (250mA IN REGULATION) Rev. B 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts