Datasheet LTC3866 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | Current Mode Synchronous Controller for Sub Milliohm DCR Sensing |
| 页数 / 页 | 36 / 7 — 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. Maximum Current Sense. Threshold Voltage vs Feedback
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LTC3866
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Maximum Current Sense Threshold Voltage vs Feedback TK/SS Pull-Up Current Shutdown (RUN) Threshold Voltage (Current Foldback) vs Temperature vs Temperature
40 1.8 1.40 35 1.6 1.35 ILIM = INTVCC 30 1.4 1.30 ILIM = 3/4 INTVCC ON 25 1.2 1.25 ILIM = 1/2 INTVCC 1.0 20 1.20 I OFF LIM = 1/4 INTVCC 0.8 15 TK/SS (µA) 1.15 ILIM = 0V 0.6 RUN THRESHOLD (V) 10 1.10 0.4 5 0.2 1.05 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 0 1.00 0 0.1 0.2 0.3 0.4 0.5 0.6 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3866 G14 3866 G15 3866 G16
Regulated Feedback Voltage Oscillator Frequency Oscillator Frequency vs Temperature vs Temperature vs Input Voltage
601.5 600 900 VFREQ = 1.2V VFREQ = 2.5V 575 800 601.0 550 700 600.5 600 525 VFREQ = 1.2V 500 600.0 500 400 599.5 475 FREQUENCY (kHz) FREQUENCY (kHz) 300 VFREQ = 0V 450 200 599.0 REGULATED FEEDBACK VOLTAGE (mV) 425 100 598.5 400 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3866 G17 3866 G18 3866 G19
Undervoltage Lockout Threshold Shutdown Current (INTVCC) vs Temperature vs Input Voltage
4.5 100 4.3 RISE 90 4.1 80 3.9 FALL 70 3.7 60 3.5 50 3.3 40 UVLO THRESHOLD (V) 3.1 30 2.9 SHUTDOWN CURRENT (µA) 20 2.7 10 2.5 0 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) INPUT VOLTAGE (V) 3866 G20 3866 G21 3866fc For more information www.linear.com/LTC3866 7 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. Maximum Current Sense Threshold Voltage vs Feedback TK/SS Pull-Up Current Shutdown (RUN) Threshold Voltage (Current Foldback) vs Temperature vs Temperature
40 1.8 1.40 35 1.6 1.35 ILIM = INTVCC 30 1.4 1.30 ILIM = 3/4 INTVCC ON 25 1.2 1.25 ILIM = 1/2 INTVCC 1.0 20 1.20 I OFF LIM = 1/4 INTVCC 0.8 15 TK/SS (µA) 1.15 ILIM = 0V 0.6 RUN THRESHOLD (V) 10 1.10 0.4 5 0.2 1.05 MAXIMUM CURRENT SENSE THRESHOLD (mV) 0 0 1.00 0 0.1 0.2 0.3 0.4 0.5 0.6 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 FEEDBACK VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3866 G14 3866 G15 3866 G16
Regulated Feedback Voltage Oscillator Frequency Oscillator Frequency vs Temperature vs Temperature vs Input Voltage
601.5 600 900 VFREQ = 1.2V VFREQ = 2.5V 575 800 601.0 550 700 600.5 600 525 VFREQ = 1.2V 500 600.0 500 400 599.5 475 FREQUENCY (kHz) FREQUENCY (kHz) 300 VFREQ = 0V 450 200 599.0 REGULATED FEEDBACK VOLTAGE (mV) 425 100 598.5 400 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 3866 G17 3866 G18 3866 G19
Undervoltage Lockout Threshold Shutdown Current (INTVCC) vs Temperature vs Input Voltage
4.5 100 4.3 RISE 90 4.1 80 3.9 FALL 70 3.7 60 3.5 50 3.3 40 UVLO THRESHOLD (V) 3.1 30 2.9 SHUTDOWN CURRENT (µA) 20 2.7 10 2.5 0 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) INPUT VOLTAGE (V) 3866 G20 3866 G21 3866fc For more information www.linear.com/LTC3866 7 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