Datasheet LT8648S (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | 42V, 15A Synchronous Step-Down Silent Switcher 2 |
| Pages / Page | 28 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS. Bias Pin Current vs Switching. … |
| File Format / Size | PDF / 2.2 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Bias Pin Current vs Switching. Frequency. Case Temperature Rise. Switching Rising Edge
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LT8648S
TYPICAL PERFORMANCE CHARACTERISTICS Bias Pin Current vs Switching Bias Pin Current vs Switching Frequency Case Temperature Rise Switching Rising Edge Switch Rising Edge
100 120 V V BIAS = 5V IN = 12V, fSW = 400kHz, L = 2.2µH V V OUT = 5V IN = 24V, fSW = 400kHz, L = 2.2µH 80 100 V V IN = 12V IN = 12V, fSW = 2MHz, L = 0.68µH FC MODE DEMO BOARD ON STILL AIR 80 L = XAL8080 VSW 60 2V/DIV TURE RISE (°C) 60 RISE TIME = 2.5ns 40 40 BIAS PIN CURRENT (mA) 20 CASE TEMPERA 20 2ns/DIV 8648S G30 VIN = 12V 0 0 ILOAD = 3A 0.2 0.6 1 1.4 1.8 2.2 2.6 3.0 0 3 6 9 12 15 SWITCHING FREQUENCY (MHz) LOAD CURRENT (A) 8648S G28 8648S G29
Switching Waveforms, Full aveforms, Full Switching Waveforms, Burst aveforms CLKOUT Waveforms Frequency Continuous Operation Mode Operation Burst Mode Operation
VCLKOUT 2V/DIV IL 1A/DIV IL 1A/DIV VSYNC 2V/DIV VSW V 5V/DIV SW VSW 10V/DIV 5V/DIV 500ns/DIV 8648S G31 500ns/DIV 8648S G32 20µs/DIV 8648S G33 fSW = 500kHz FRONT PAGE APPLICATION FRONT PAGE APPLICATION SYNCHRONIZATION MODE 12VIN TO 5VOUT AT 1A 12VIN TO 5VOUT AT 10mA FC MODE Burst Mode OPERATION Rev. 0 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Applications Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Bias Pin Current vs Switching Bias Pin Current vs Switching Frequency Case Temperature Rise Switching Rising Edge Switch Rising Edge
100 120 V V BIAS = 5V IN = 12V, fSW = 400kHz, L = 2.2µH V V OUT = 5V IN = 24V, fSW = 400kHz, L = 2.2µH 80 100 V V IN = 12V IN = 12V, fSW = 2MHz, L = 0.68µH FC MODE DEMO BOARD ON STILL AIR 80 L = XAL8080 VSW 60 2V/DIV TURE RISE (°C) 60 RISE TIME = 2.5ns 40 40 BIAS PIN CURRENT (mA) 20 CASE TEMPERA 20 2ns/DIV 8648S G30 VIN = 12V 0 0 ILOAD = 3A 0.2 0.6 1 1.4 1.8 2.2 2.6 3.0 0 3 6 9 12 15 SWITCHING FREQUENCY (MHz) LOAD CURRENT (A) 8648S G28 8648S G29
Switching Waveforms, Full aveforms, Full Switching Waveforms, Burst aveforms CLKOUT Waveforms Frequency Continuous Operation Mode Operation Burst Mode Operation
VCLKOUT 2V/DIV IL 1A/DIV IL 1A/DIV VSYNC 2V/DIV VSW V 5V/DIV SW VSW 10V/DIV 5V/DIV 500ns/DIV 8648S G31 500ns/DIV 8648S G32 20µs/DIV 8648S G33 fSW = 500kHz FRONT PAGE APPLICATION FRONT PAGE APPLICATION SYNCHRONIZATION MODE 12VIN TO 5VOUT AT 1A 12VIN TO 5VOUT AT 10mA FC MODE Burst Mode OPERATION Rev. 0 8 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Applications Related Parts
