Datasheet LT8645S, LT8646S (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | 65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5μA Quiescent Current |
| Pages / Page | 30 / 10 — LT8645S Transient Response;. LT8646S Transient Response;. Internal … |
| File Format / Size | PDF / 457 Kb |
| Document Language | English |
LT8645S Transient Response;. LT8646S Transient Response;. Internal Compensation. External Compensation
Text Version of Document
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) 8645Sfa 10 For more information www.linear.com/LT8645S
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) 8645Sfa 10 For more information www.linear.com/LT8645S
