Datasheet LTC3866 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | Current Mode Synchronous Controller for Sub Milliohm DCR Sensing |
| 页数 / 页 | 36 / 6 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 538 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Load Step. (Burst Mode. Operation)
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LTC3866
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Load Step Load Step Load Step (Burst Mode
®
Operation) (Continuous Conduction Mode) (Pulse-Skipping Mode)
ILOAD ILOAD ILOAD 10A/DIV 10A/DIV 10A/DIV 1.5A TO 15A 1.5A TO 15A 1.5A TO 15A 0A 0A 0A IL IL IL 10A/DIV 10A/DIV 10A/DIV 0A 0A 0A VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED 20µs/DIV 3866 G04 VIN = 12V 20µs/DIV 3866 G05 VIN = 12V 20µs/DIV 3866 G06 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT
Tracking Up and Down with Inductor Current at Light Load Prebiased Output at 1.2V TK/SS External Ramp
VTK/SS CONTINUOUS VOUT V CONDUCTION 500mV/DIV TK/SS 0A 0.2V/DIV MODE 5A/DIV VOUT Burst Mode OPERATION 0V VOUT 5A/DIV 0.5V/DIV 0A TRACK/SS 500mV/DIV VFB PULSE-SKIPPING 500mV/DIV 0V MODE 0A 0V 5A/DIV 10µs/DIV 3866 G07 VIN = 12V 500µs/DIV 3866 G08 VIN = 12V 2.5ms/DIV 3866 G09 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V ILOAD = 300mA 1Ω LOAD
Current Sense Threshold Maximum Current Sense Threshold INTVCC Line Regulation vs ITH Voltage vs Common Mode Voltage
6 40 40 ILIM = 0V 35 ILIM = 1/4 INTVCC 35 5 30 ILIM = 1/2 INTVCC I I LIM = 3/4 INTVCC LIM = INTVCC 30 I 4 25 LIM = INTVCC ILIM = 3/4 INTVCC 20 25 ILIM = 1/2 INTVCC 3 15 20 VOLTAGE (V) I CC 10 LIM = 1/4 INTVCC 15 2 INTV 5 I 10 LIM = 0V 0 1 CURRENT SENSE THRESHOLD (mV) CURRENT SENSE THRESHOLD (mV) –5 5 0 –10 0 0 5 10 15 20 25 30 35 40 0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 INPUT VOLTAGE (V) VITH (V) VSENSE COMMON MODE VOLTAGE (V) 3866 G10 3866 G11 3866 G12 3866fc 6 For more information www.linear.com/LTC3866 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Load Step Load Step Load Step (Burst Mode
®
Operation) (Continuous Conduction Mode) (Pulse-Skipping Mode)
ILOAD ILOAD ILOAD 10A/DIV 10A/DIV 10A/DIV 1.5A TO 15A 1.5A TO 15A 1.5A TO 15A 0A 0A 0A IL IL IL 10A/DIV 10A/DIV 10A/DIV 0A 0A 0A VOUT VOUT VOUT 100mV/DIV 100mV/DIV 100mV/DIV AC-COUPLED AC-COUPLED AC-COUPLED 20µs/DIV 3866 G04 VIN = 12V 20µs/DIV 3866 G05 VIN = 12V 20µs/DIV 3866 G06 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT FRONT PAGE CIRCUIT
Tracking Up and Down with Inductor Current at Light Load Prebiased Output at 1.2V TK/SS External Ramp
VTK/SS CONTINUOUS VOUT V CONDUCTION 500mV/DIV TK/SS 0A 0.2V/DIV MODE 5A/DIV VOUT Burst Mode OPERATION 0V VOUT 5A/DIV 0.5V/DIV 0A TRACK/SS 500mV/DIV VFB PULSE-SKIPPING 500mV/DIV 0V MODE 0A 0V 5A/DIV 10µs/DIV 3866 G07 VIN = 12V 500µs/DIV 3866 G08 VIN = 12V 2.5ms/DIV 3866 G09 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V ILOAD = 300mA 1Ω LOAD
Current Sense Threshold Maximum Current Sense Threshold INTVCC Line Regulation vs ITH Voltage vs Common Mode Voltage
6 40 40 ILIM = 0V 35 ILIM = 1/4 INTVCC 35 5 30 ILIM = 1/2 INTVCC I I LIM = 3/4 INTVCC LIM = INTVCC 30 I 4 25 LIM = INTVCC ILIM = 3/4 INTVCC 20 25 ILIM = 1/2 INTVCC 3 15 20 VOLTAGE (V) I CC 10 LIM = 1/4 INTVCC 15 2 INTV 5 I 10 LIM = 0V 0 1 CURRENT SENSE THRESHOLD (mV) CURRENT SENSE THRESHOLD (mV) –5 5 0 –10 0 0 5 10 15 20 25 30 35 40 0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 INPUT VOLTAGE (V) VITH (V) VSENSE COMMON MODE VOLTAGE (V) 3866 G10 3866 G11 3866 G12 3866fc 6 For more information www.linear.com/LTC3866 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts