Datasheet LT3845A (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequency |
| 页数 / 页 | 26 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Shutdown Threshold (Rising). … |
| 文件格式/大小 | PDF / 295 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Shutdown Threshold (Rising). Shutdown Threshold (Falling). vs Temperature
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LT3845A
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Threshold (Rising) Shutdown Threshold (Falling) vs Temperature vs Temperature VCC vs Temperature
1.38 1.26 8.2 ICC = 20mA 1.37 1.25 8.1 8.0 1.36 1.24 7.9 1.35 1.23 (V) V CC 7.8 1.34 1.22 7.7 1.33 1.21 SHUTDOWN THRESHOLD, RISING (V) 7.6 SHUTDOWN THRESHOLD, FALLING (V) 1.32 1.20 7.5 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3845A G01 3845A G02 3845A G03
VCC vs ICC(LOAD) VCC vs VIN ICC Current Limit vs Temperature
8.05 9 225 TA = 25°C ICC = 20mA TA = 25°C 200 8 8.00 175 7 150 (V) 7.95 (V) 6 V CC V CC 125 5 CURRENT LIMIT (mA) 100 7.90 I CC 4 75 7.85 3 50 0 5 10 15 20 25 30 35 40 4 5 6 7 8 9 10 11 12 –50 –25 0 25 50 75 100 125 ICC(LOAD) (mA) VIN (V) TEMPERATURE (°C) 3845A G04 3845A G05 3845A G06
VCC UVLO Threshold (Rising) Error Amp Transconductance vs Temperature ICC vs VCC (SHDN = 0V) vs Temperature
6.5 25 350 TA = 25°C 6.4 345 20 340 6.3 15 (µA) 335 6.2 I CC 10 330 UVLO THRESHOLD, RISING (V) 6.1 5 V CC 325 ERROR AMP TRANSCONDUCTANCE (µS) 6.0 0 320 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VCC (V) TEMPERATURE (°C) 3845A G07 3845A G08 3845A G09 3845afa 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Threshold (Rising) Shutdown Threshold (Falling) vs Temperature vs Temperature VCC vs Temperature
1.38 1.26 8.2 ICC = 20mA 1.37 1.25 8.1 8.0 1.36 1.24 7.9 1.35 1.23 (V) V CC 7.8 1.34 1.22 7.7 1.33 1.21 SHUTDOWN THRESHOLD, RISING (V) 7.6 SHUTDOWN THRESHOLD, FALLING (V) 1.32 1.20 7.5 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3845A G01 3845A G02 3845A G03
VCC vs ICC(LOAD) VCC vs VIN ICC Current Limit vs Temperature
8.05 9 225 TA = 25°C ICC = 20mA TA = 25°C 200 8 8.00 175 7 150 (V) 7.95 (V) 6 V CC V CC 125 5 CURRENT LIMIT (mA) 100 7.90 I CC 4 75 7.85 3 50 0 5 10 15 20 25 30 35 40 4 5 6 7 8 9 10 11 12 –50 –25 0 25 50 75 100 125 ICC(LOAD) (mA) VIN (V) TEMPERATURE (°C) 3845A G04 3845A G05 3845A G06
VCC UVLO Threshold (Rising) Error Amp Transconductance vs Temperature ICC vs VCC (SHDN = 0V) vs Temperature
6.5 25 350 TA = 25°C 6.4 345 20 340 6.3 15 (µA) 335 6.2 I CC 10 330 UVLO THRESHOLD, RISING (V) 6.1 5 V CC 325 ERROR AMP TRANSCONDUCTANCE (µS) 6.0 0 320 –50 –25 0 25 50 75 100 125 0 2 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) VCC (V) TEMPERATURE (°C) 3845A G07 3845A G08 3845A G09 3845afa 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts