Datasheet LT8645S, LT8646S (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | 65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5μA Quiescent Current |
| Pages / Page | 30 / 9 — Bias Pin Current. Case Temperature Rise. Switching Waveforms, Full. … |
| File Format / Size | PDF / 457 Kb |
| Document Language | English |
Bias Pin Current. Case Temperature Rise. Switching Waveforms, Full. Switch Rising Edge. Frequency Continuous Operation
Text Version of Document
LT8645S/LT8646S TYPICAL PERFORMANCE CHARACTERISTICS
Bias Pin Current Case Temperature Rise
30 80 V DC2468A DEMO BOARD BIAS = 5V VOUT = 5V 70 V 25 IN = 12V, fSW = 500kHz VIN = 12V VIN = 24V, fSW = 500kHz ILOAD = 1A 60 VIN = 12V, fSW = 2MHz 20 VIN = 24V, fSW = 2MHz 50 15 TURE RISE (°C) 40 30 10 BIAS PIN CURRENT (mA) 20 5 CASE TEMPERA 10 0 0 0.2 0.6 1 1.4 1.8 2.2 0 1 2 3 4 5 6 7 8 SWITCHING FREQUENCY (MHz) LOAD CURRENT (A) 8645S G37 8645S G38
Switching Waveforms, Full Switch Rising Edge Frequency Continuous Operation
IL 1A/DIV VSW 2V/DIV VSW 5V/DIV 2ns/DIV 8645S G39 500ns/DIV 8645S G40 VIN = 12V I FRONT PAGE APPLICATION LOAD = 3A 12VIN TO 5VOUT AT 2A
Switching Waveforms, Burst Mode Operation Switching Waveforms
IL IL 500mA/DIV 1A/DIV VSW VSW 5V/DIV 20V/DIV 8645S G42 10µs/DIV 8645S G41 500ns/DIV FRONT PAGE APPLICATION FRONT PAGE APPLICATION 12VIN TO 5VOUT AT 10mA 48VIN TO 5VOUT AT 2A VSYNC = 0V 8645Sfa For more information www.linear.com/LT8645S 9
Bias Pin Current Case Temperature Rise
30 80 V DC2468A DEMO BOARD BIAS = 5V VOUT = 5V 70 V 25 IN = 12V, fSW = 500kHz VIN = 12V VIN = 24V, fSW = 500kHz ILOAD = 1A 60 VIN = 12V, fSW = 2MHz 20 VIN = 24V, fSW = 2MHz 50 15 TURE RISE (°C) 40 30 10 BIAS PIN CURRENT (mA) 20 5 CASE TEMPERA 10 0 0 0.2 0.6 1 1.4 1.8 2.2 0 1 2 3 4 5 6 7 8 SWITCHING FREQUENCY (MHz) LOAD CURRENT (A) 8645S G37 8645S G38
Switching Waveforms, Full Switch Rising Edge Frequency Continuous Operation
IL 1A/DIV VSW 2V/DIV VSW 5V/DIV 2ns/DIV 8645S G39 500ns/DIV 8645S G40 VIN = 12V I FRONT PAGE APPLICATION LOAD = 3A 12VIN TO 5VOUT AT 2A
Switching Waveforms, Burst Mode Operation Switching Waveforms
IL IL 500mA/DIV 1A/DIV VSW VSW 5V/DIV 20V/DIV 8645S G42 10µs/DIV 8645S G41 500ns/DIV FRONT PAGE APPLICATION FRONT PAGE APPLICATION 12VIN TO 5VOUT AT 10mA 48VIN TO 5VOUT AT 2A VSYNC = 0V 8645Sfa For more information www.linear.com/LT8645S 9
