Datasheet LT3682 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 1A Micropower Step-Down Switching Regulator |
| 页数 / 页 | 24 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 265 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch Current Limit. (SYNC Pin Grounded)
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LT3682
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch Current Limit Switch Current Limit (SYNC Pin Grounded) Switch Voltage Drop
1.9 1.9 700 DC = 10% 1.7 1.7 600 SYNC < 0.3V 1.5 1.5 500 1.3 1.3 DC = 90% 400 SYNC > 0.8V 1.1 OR CLOCKED 1.1 300 TAGE DROP (mV) 0.9 0.9 VOL 200 SWITCH CURRENT LIMIT (A) SWITCH CURRENT LIMIT (A) 0.7 0.7 100 0.5 0.5 0 0 20 40 60 80 100 50 25 0 25 50 75 100 125 0 0.25 0.5 0.75 1 1.25 DUTY CYCLE (%) TEMPERATURE (°C) SWITCH CURRENT (A) 3682 G10 3682 G11 3682 G12
Boost Pin Current Feedback Voltage Switching Frequency
35 810 1.20 RRT = 29.4k 30 1.15 1.10 25 800 1.05 20 TAGE (mV) 790 1 15 0.95 FREQUENCY (MHz) 10 0.90 BOOST PIN CURRENT (mA) FEEDBACK VOL 780 5 0.85 0 770 0.80 0 0.25 0.5 0.75 1 1.25 50 25 0 25 50 75 100 125 50 25 0 25 50 75 100 125 SWITCH CURRENT (A) TEMPERATURE(°C) TEMPERATURE(°C) 3682 G13 3682 G14 3682 G15
Frequency Foldback Minimum Switch On-Time Soft-Start
1200 120 2 RRT = 29.4k 1.8 1000 100 1.6 1.4 800 80 1.2 600 60 1 0.8 FREQUENCY (kHz) 400 40 0.6 SWITCH CURRENT LIMIT (A) 0.4 200 MINIMUM SWITCH ON TIME (ns) 20 0.2 0 0 0 0 100 200 300 400 500 600 700 800 900 50 25 0 25 50 75 100 125 0 0.5 1 1.5 2 2.5 3 3.5 FB PIN VOLTAGE (mV) TEMPERATURE (°C) RUN/SS PIN VOLTAGE (V) 3682 G16 3682 G17 3682 G18 3682f 5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Switch Current Limit Switch Current Limit (SYNC Pin Grounded) Switch Voltage Drop
1.9 1.9 700 DC = 10% 1.7 1.7 600 SYNC < 0.3V 1.5 1.5 500 1.3 1.3 DC = 90% 400 SYNC > 0.8V 1.1 OR CLOCKED 1.1 300 TAGE DROP (mV) 0.9 0.9 VOL 200 SWITCH CURRENT LIMIT (A) SWITCH CURRENT LIMIT (A) 0.7 0.7 100 0.5 0.5 0 0 20 40 60 80 100 50 25 0 25 50 75 100 125 0 0.25 0.5 0.75 1 1.25 DUTY CYCLE (%) TEMPERATURE (°C) SWITCH CURRENT (A) 3682 G10 3682 G11 3682 G12
Boost Pin Current Feedback Voltage Switching Frequency
35 810 1.20 RRT = 29.4k 30 1.15 1.10 25 800 1.05 20 TAGE (mV) 790 1 15 0.95 FREQUENCY (MHz) 10 0.90 BOOST PIN CURRENT (mA) FEEDBACK VOL 780 5 0.85 0 770 0.80 0 0.25 0.5 0.75 1 1.25 50 25 0 25 50 75 100 125 50 25 0 25 50 75 100 125 SWITCH CURRENT (A) TEMPERATURE(°C) TEMPERATURE(°C) 3682 G13 3682 G14 3682 G15
Frequency Foldback Minimum Switch On-Time Soft-Start
1200 120 2 RRT = 29.4k 1.8 1000 100 1.6 1.4 800 80 1.2 600 60 1 0.8 FREQUENCY (kHz) 400 40 0.6 SWITCH CURRENT LIMIT (A) 0.4 200 MINIMUM SWITCH ON TIME (ns) 20 0.2 0 0 0 0 100 200 300 400 500 600 700 800 900 50 25 0 25 50 75 100 125 0 0.5 1 1.5 2 2.5 3 3.5 FB PIN VOLTAGE (mV) TEMPERATURE (°C) RUN/SS PIN VOLTAGE (V) 3682 G16 3682 G17 3682 G18 3682f 5