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LTC3870 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3870 Datasheet(HTML) 5 Page - Linear Technology |
5 / 22 page LTC3870 5 3870fa For more information www.linear.com/LTC3870 Typical perForMance characTerisTics Load Step (Discontinuous Conduction Mode) 4-Phase Operation LTC3880 and LTC3870 Load Step (Forced Continuous Mode) 4-Phase Operation LTC3880 and LTC3870 Inductor Current at Light Load Start-Up Into a Pre-Biased Output 4-Phase Operation LTC3880 and LTC3870 Current Sense Threshold vs ITH Voltage INTVCC Line Regulation DC Output Current Matching Between LTC3880 and LTC3870 Dynamic Current Sharing During a Load Transient in a 4-Phase Operation LTC3880 and LTC3870 Quiescent Current vs Input Voltage Without EXTVCC VITH (V) 0 –40 60 40 20 0 –20 80 0.5 1 1.5 2 2.5 3870 G08 RANGE LOW RANGE HIGH INPUT VOLTAGE (V) 0 0 4 5 3 2 1 6 20 10 30 40 50 60 3870 G09 INPUT VOLTAGE (V) 0 0 2.5 3 2 1.5 1 0.5 3.5 20 10 30 40 50 60 3870 G12 1µs/DIV IL_3870(CH0) FORCED CONTINUOUS MODE 5A/DIV IL_3870(CH0) DISCONTINUOUS CONDUCTION MODE 5A/DIV 3870 G06 VIN = 12V VOUT = 1.8V ILOAD = 1A 2ms/DIV RUN ALL RUN PINS TIED TOGETHER 2V/DIV VOUT LTC3870 IN DCM 500mV/DIV 3870 G07 VIN = 12V VOUT = 1.8V TOTAL OUTPUT CURRENT (A) 0 0 20 15 10 5 25 10 20 30 40 50 60 70 80 90 3870 G10 LTC3870 CH1 LTC3870 CH0 LTC3880 CH1 LTC3880 CH0 50µs/DIV IL_3880(CH0) IL_3880(CH1) IL_3870(CH0) IL_3870(CH1) 5A/DIV 3870 G11 ILOAD 0A TO 32A TO 0A 50µs/DIV ILOAD 20A/DIV 0A TO 20A TO 0A IL_3880(CH0) 10A/DIV IL_3870(CH0) 10A/DIV VOUT 100mV/DIV AC-COUPLED 3870 G04 VIN = 12V VOUT = 1.8V 50µs/DIV ILOAD 20A/DIV 0A TO 20A TO 0A IL_3880(CH0) 10A/DIV IL_3870(CH0) 10A/DIV VOUT 100mV/DIV AC-COUPLED 3870 G05 VIN = 12V VOUT = 1.8V |
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Similar Description - LTC3870_15 |
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