Datasheet LT8611 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 42V, 2.5A Synchronous Step-Down Regulator with Current Sense and 2.5μA Quiescent Current |
| 页数 / 页 | 26 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Dropout Voltage. Switching … |
| 文件格式/大小 | PDF / 343 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Dropout Voltage. Switching Frequency. Burst Frequency. Minimum Load to Full Frequency
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LT8611
TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage Switching Frequency Burst Frequency
800 740 800 RT = 60.4k VIN = 12V 700 730 VOUT = 3.3V 700 600 720 600 500 710 500 400 700 400 300 690 300 DROPOUT VOLTAGE (mV) 200 680 200 SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) 100 670 100 0 660 0 0 0.5 1 1.5 2 2.5 3 –55 –25 5 35 65 95 125 155 0 50 100 150 200 LOAD CURRENT (A) TEMPERATURE (°C) LOAD CURRENT (mA) 8611 G19 8611 G20 8611 G21
Minimum Load to Full Frequency (SYNC DC High) Frequency Foldback Soft-Start Tracking
100 800 1.2 VOUT = 5V VOUT = 3.3V fSW = 700kHz 700 VIN = 12V 80 VSYNC = 0V 1.0 600 RT = 60.4k 0.8 60 500 400 0.6 40 300 FB VOLTAGE (V) 0.4 LOAD CURRENT (mA) 200 20 SWITCHING FREQUENCY (kHz) 0.2 100 0 0 0 5 10 15 20 25 30 35 40 45 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 INPUT VOLTAGE (V) FB VOLTAGE (V) TR/SS VOLTAGE (V) 8611 G22 8611 G23 8611 G24
Soft-Start Current PG High Thresholds PG Low Thresholds
2.4 12.0 –7.0 VSS = 0.5V 2.3 11.5 –7.5 (%) (%) 11.0 –8.0 2.2 REF REF 10.5 FB RISING –8.5 2.1 10.0 –9.0 FB FALLING FB RISING 2.0 9.5 –9.5 1.9 9.0 –10.0 FB FALLING SS PIN CURRENT (µA) 8.5 –10.5 1.8 8.0 –11.0 1.7 PG THRESHOLD OFFSET FROM V 7.5 PG THRESHOLD OFFSET FROM V –11.5 1.6 7.0 –12.0 –50 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8611 G25 8611 G26 8611 G27 8611fa 6 For more information www.linear.com/LT8611 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage Switching Frequency Burst Frequency
800 740 800 RT = 60.4k VIN = 12V 700 730 VOUT = 3.3V 700 600 720 600 500 710 500 400 700 400 300 690 300 DROPOUT VOLTAGE (mV) 200 680 200 SWITCHING FREQUENCY (kHz) SWITCHING FREQUENCY (kHz) 100 670 100 0 660 0 0 0.5 1 1.5 2 2.5 3 –55 –25 5 35 65 95 125 155 0 50 100 150 200 LOAD CURRENT (A) TEMPERATURE (°C) LOAD CURRENT (mA) 8611 G19 8611 G20 8611 G21
Minimum Load to Full Frequency (SYNC DC High) Frequency Foldback Soft-Start Tracking
100 800 1.2 VOUT = 5V VOUT = 3.3V fSW = 700kHz 700 VIN = 12V 80 VSYNC = 0V 1.0 600 RT = 60.4k 0.8 60 500 400 0.6 40 300 FB VOLTAGE (V) 0.4 LOAD CURRENT (mA) 200 20 SWITCHING FREQUENCY (kHz) 0.2 100 0 0 0 5 10 15 20 25 30 35 40 45 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 INPUT VOLTAGE (V) FB VOLTAGE (V) TR/SS VOLTAGE (V) 8611 G22 8611 G23 8611 G24
Soft-Start Current PG High Thresholds PG Low Thresholds
2.4 12.0 –7.0 VSS = 0.5V 2.3 11.5 –7.5 (%) (%) 11.0 –8.0 2.2 REF REF 10.5 FB RISING –8.5 2.1 10.0 –9.0 FB FALLING FB RISING 2.0 9.5 –9.5 1.9 9.0 –10.0 FB FALLING SS PIN CURRENT (µA) 8.5 –10.5 1.8 8.0 –11.0 1.7 PG THRESHOLD OFFSET FROM V 7.5 PG THRESHOLD OFFSET FROM V –11.5 1.6 7.0 –12.0 –50 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8611 G25 8611 G26 8611 G27 8611fa 6 For more information www.linear.com/LT8611 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts