Datasheet LT8645S, LT8646S (Analog Devices) - 9
| Hersteller | Analog Devices |
| Beschreibung | 65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5μA Quiescent Current |
| Seiten / Seite | 30 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS. Bias Pin Current. Case Temperature … |
| Revision | B |
| Dateiformat / Größe | PDF / 2.4 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Bias Pin Current. Case Temperature Rise. Switching Waveforms, Full. Switch Rising Edge
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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 Rev. B For more information www.analog.com 9 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 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 Rev. B For more information www.analog.com 9 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