Datasheet LT8697 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation |
| 页数 / 页 | 30 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 502 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. VUSB5V vs VTR/SS. ITR/SS vs Temperature
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LT8697
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. VUSB5V vs VTR/SS ITR/SS vs Temperature PG High Thresholds
6 2.2 11.0 VTR/SS = 0.5V 2.1 (%) 10.5 5 10.0 2.0 USB5V 9.5 4 USB5V RISING 1.9 9.0 (V) (µA) 3 1.8 8.5 V USB5V I TR/SS 1.7 8.0 USB5V FALLING 2 7.5 1.6 7.0 1 1.5 6.5 PG THRESHOLD OFFSET FROM V 0 1.4 6.0 0 0.2 0.4 0.6 0.8 1.0 1.2 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 VTR/SS (V) TEMPERATURE (°C) TEMPERATURE (°C) 8697 G25 8697 G26 8697 G27
PG Low Thresholds ISYS vs VIN ISYS vs Switching Frequency
–8.0 13 12 fSW = 2MHz (%) –8.5 12 10 –9.0 USB5V VIN = 24V USB5V RISING –9.5 11 8 –10.0 VIN = 12V USB5V FALLING –10.5 (mA) 10 (mA) 6 I SYS I SYS –11.0 9 4 –11.5 –12.0 8 2 –12.5 PG THRESHOLD OFFSET FROM V –13.0 7 0 –55 –25 5 35 65 95 125 155 5 10 15 20 25 30 35 40 45 0 0.5 1 1.5 2 2.5 TEMPERATURE (°C) VIN (V) SWITCHING FREQUENCY (MHz) 8697 G28 8697 G29 8697 G30
Transient Response Transient Response 0A to 1A Load Step 1A to 2A Load Step
5.50 5 5.50 5 FRONT PAGE APPLICATION CIRCUIT 5.25 4 5.25 VOUT 4 V CURRENT (A) OUT CURRENT (A) 5.00 3 5.00 3 VLOAD VLOAD VOLTAGE (V) 4.75 2 VOLTAGE (V) 4.75 2 ILOAD ILOAD 25mA/µs 25mA/µs 4.50 1 4.50 1 FRONT PAGE APPLICATION CIRCUIT 4.25 0 4.25 0 100µs/DIV 8697 G31 100µs/DIV 8697 G32 8697fb For more information www.linear.com/LT8697 7 Document Outline Features Applications Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. VUSB5V vs VTR/SS ITR/SS vs Temperature PG High Thresholds
6 2.2 11.0 VTR/SS = 0.5V 2.1 (%) 10.5 5 10.0 2.0 USB5V 9.5 4 USB5V RISING 1.9 9.0 (V) (µA) 3 1.8 8.5 V USB5V I TR/SS 1.7 8.0 USB5V FALLING 2 7.5 1.6 7.0 1 1.5 6.5 PG THRESHOLD OFFSET FROM V 0 1.4 6.0 0 0.2 0.4 0.6 0.8 1.0 1.2 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 VTR/SS (V) TEMPERATURE (°C) TEMPERATURE (°C) 8697 G25 8697 G26 8697 G27
PG Low Thresholds ISYS vs VIN ISYS vs Switching Frequency
–8.0 13 12 fSW = 2MHz (%) –8.5 12 10 –9.0 USB5V VIN = 24V USB5V RISING –9.5 11 8 –10.0 VIN = 12V USB5V FALLING –10.5 (mA) 10 (mA) 6 I SYS I SYS –11.0 9 4 –11.5 –12.0 8 2 –12.5 PG THRESHOLD OFFSET FROM V –13.0 7 0 –55 –25 5 35 65 95 125 155 5 10 15 20 25 30 35 40 45 0 0.5 1 1.5 2 2.5 TEMPERATURE (°C) VIN (V) SWITCHING FREQUENCY (MHz) 8697 G28 8697 G29 8697 G30
Transient Response Transient Response 0A to 1A Load Step 1A to 2A Load Step
5.50 5 5.50 5 FRONT PAGE APPLICATION CIRCUIT 5.25 4 5.25 VOUT 4 V CURRENT (A) OUT CURRENT (A) 5.00 3 5.00 3 VLOAD VLOAD VOLTAGE (V) 4.75 2 VOLTAGE (V) 4.75 2 ILOAD ILOAD 25mA/µs 25mA/µs 4.50 1 4.50 1 FRONT PAGE APPLICATION CIRCUIT 4.25 0 4.25 0 100µs/DIV 8697 G31 100µs/DIV 8697 G32 8697fb For more information www.linear.com/LT8697 7 Document Outline Features Applications Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts