Datasheet LT8613 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 42V, 6A Synchronous Step-Down Regulator with Current Sense and 3µA Quiescent Current |
| 页数 / 页 | 26 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Frequency Foldback. Soft-Start … |
| 修订版 | A |
| 文件格式/大小 | PDF / 2.0 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Frequency Foldback. Soft-Start Tracking. Soft-Start Current. RT Programmed Switching
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LT8613
TYPICAL PERFORMANCE CHARACTERISTICS Frequency Foldback Soft-Start Tracking Soft-Start Current
800 1.2 2.4 VOUT = 3.3V VSS = 0.5V 700 VIN = 12V 2.3 VSYNC = 0V 1.0 600 RT = 60.4k 2.2 0.8 500 2.1 400 0.6 2.0 300 FB VOLTAGE (V) 1.9 0.4 200 SS PIN CURRENT (µA) 1.8 SWITCHING FREQUENCY (kHz) 0.2 100 1.7 0 0 1.6 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 –50 –25 5 35 65 95 125 155 FB VOLTAGE (V) TR/SS VOLTAGE (V) TEMPERATURE (°C) 8613 G19 8613 G20 8613 G21
RT Programmed Switching PG High Thresholds PG Low Thresholds Frequency
12.0 –7.0 250 11.5 –7.5 225 (%) (%) REF 11.0 REF –8.0 200 10.5 FB RISING –8.5 175 10.0 –9.0 150 FB FALLING FB RISING 9.5 –9.5 125 9.0 –10.0 FB FALLING 100 8.5 –10.5 RT PIN RESISTOR (kΩ) 75 8.0 –11.0 50 PG THRESHOLD OFFSET FROM V 7.5 PG THRESHOLD OFFSET FROM V –11.5 25 7.0 –12.0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0.2 0.6 1 1.4 1.8 2.2 TEMPERATURE (°C) TEMPERATURE (°C) SWITCHING FREQUENCY (MHz) 8613 G22 8613 G23 8613 G24
VIN UVLO Switching Waveforms Switching Waveforms
3.6 3.4 IL I 1A/DIV 3.2 L 1A/DIV 3.0 VSW VSW 2.8 5V/DIV 5V/DIV 2.6 INPUT VOLTAGE (V) 5µs/DIV 8613 G26 1µs/DIV 8613 G27 2.4 12VIN TO 5VOUT AT 20mA; FRONT PAGE APP 12VIN TO 5VOUT AT 2A 2.2 VSYNC = 0V FRONT PAGE APP 2.0–55 –25 5 35 65 95 125 155 TEMPERATURE (°C) 8613 G25 Rev. A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Frequency Foldback Soft-Start Tracking Soft-Start Current
800 1.2 2.4 VOUT = 3.3V VSS = 0.5V 700 VIN = 12V 2.3 VSYNC = 0V 1.0 600 RT = 60.4k 2.2 0.8 500 2.1 400 0.6 2.0 300 FB VOLTAGE (V) 1.9 0.4 200 SS PIN CURRENT (µA) 1.8 SWITCHING FREQUENCY (kHz) 0.2 100 1.7 0 0 1.6 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 –50 –25 5 35 65 95 125 155 FB VOLTAGE (V) TR/SS VOLTAGE (V) TEMPERATURE (°C) 8613 G19 8613 G20 8613 G21
RT Programmed Switching PG High Thresholds PG Low Thresholds Frequency
12.0 –7.0 250 11.5 –7.5 225 (%) (%) REF 11.0 REF –8.0 200 10.5 FB RISING –8.5 175 10.0 –9.0 150 FB FALLING FB RISING 9.5 –9.5 125 9.0 –10.0 FB FALLING 100 8.5 –10.5 RT PIN RESISTOR (kΩ) 75 8.0 –11.0 50 PG THRESHOLD OFFSET FROM V 7.5 PG THRESHOLD OFFSET FROM V –11.5 25 7.0 –12.0 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 0.2 0.6 1 1.4 1.8 2.2 TEMPERATURE (°C) TEMPERATURE (°C) SWITCHING FREQUENCY (MHz) 8613 G22 8613 G23 8613 G24
VIN UVLO Switching Waveforms Switching Waveforms
3.6 3.4 IL I 1A/DIV 3.2 L 1A/DIV 3.0 VSW VSW 2.8 5V/DIV 5V/DIV 2.6 INPUT VOLTAGE (V) 5µs/DIV 8613 G26 1µs/DIV 8613 G27 2.4 12VIN TO 5VOUT AT 20mA; FRONT PAGE APP 12VIN TO 5VOUT AT 2A 2.2 VSYNC = 0V FRONT PAGE APP 2.0–55 –25 5 35 65 95 125 155 TEMPERATURE (°C) 8613 G25 Rev. A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts