Datasheet LT3697 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | USB 5V, 2.5A Output, 35V Input Buck with Cable Drop Compensation |
| 页数 / 页 | 32 / 6 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. No … |
| 文件格式/大小 | PDF / 451 Kb |
| 文件语言 | 英语 |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. No Load Input Current. LT3697 Temperature Rise
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LT3697
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. No Load Input Current LT3697 Temperature Rise SYS Pin Current vs Input Voltage
40 200 3.0 DC1893A DEMO BOARD VUSB5V = 5.5V IN REGULATION 24°C AMBIENT TEMPERATURE NO AIR FLOW 160 2.5 30 fSW = 500kHz 2.0 120 20 (mA) 1.5 TURE RISE (°C) I SYS 80 1.0 INPUT CURRENT (mA) IC TEMPERA 10 40 VIN = 8V 0.5 VIN = 12V VIN = 16V 0 0 0.0 0 0.5 1 1.5 2 2.5 0 1 2 3 4 5 6 7 8 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) VSYS (V) INPUT VOLTAGE (V) 3697 G10 3697 G11 3697 G12
No Load Input Current vs Temperature Switch VCESAT BST Pin Current
25 300 50 VBST - VSW = 4.5V VBST - VSW = 4.5V 250 20 40 INCREASED SUPPLY CURRENT DUE TO CATCH DIODE 200 15 (mV) LEAKAGE AT HIGH T 30 TEMPERATURE CESA 150 10 20 100 V SWITCH V BST CURRENT (mA) IN = 12V CATCH DIODE: NO LOAD INPUT CURRENT (mA) 5 10 CENTRAL SEMI 50 CMSH3-40MA 0 0 0 –50 –25 0 25 50 75 100 125 150 0.0 0.5 1.0 1.5 2.0 2.5 0.0 0.5 1.0 1.5 2.0 2.5 TEMPERATURE (°C) SWITCH CURRENT (A) SWITCH CURRENT (A) 3697 G13 3697 G14 3697 G15
Switch Current Limit Switch Current Limit vs Temperature vs Duty Cycle Switching Frequency
7.0 7 500 RT = 255k 475 6.0 6 450 30% DC 5.0 5 425 70% DC 400 4.0 4 375 CURRENT LIMIT (A) 350 SWITCH CURRENT LIMIT (A) 3.0 3 SWITCHING FREQUENCY (kHz) 325 2.0 2 300 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) DUTY CYCLE (%) TEMPERATURE (°C) 3697 G16 3697 G17 3697 G18 3697f 6 For more information www.linear.com/LT3697
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. No Load Input Current LT3697 Temperature Rise SYS Pin Current vs Input Voltage
40 200 3.0 DC1893A DEMO BOARD VUSB5V = 5.5V IN REGULATION 24°C AMBIENT TEMPERATURE NO AIR FLOW 160 2.5 30 fSW = 500kHz 2.0 120 20 (mA) 1.5 TURE RISE (°C) I SYS 80 1.0 INPUT CURRENT (mA) IC TEMPERA 10 40 VIN = 8V 0.5 VIN = 12V VIN = 16V 0 0 0.0 0 0.5 1 1.5 2 2.5 0 1 2 3 4 5 6 7 8 5 10 15 20 25 30 35 40 OUTPUT CURRENT (A) VSYS (V) INPUT VOLTAGE (V) 3697 G10 3697 G11 3697 G12
No Load Input Current vs Temperature Switch VCESAT BST Pin Current
25 300 50 VBST - VSW = 4.5V VBST - VSW = 4.5V 250 20 40 INCREASED SUPPLY CURRENT DUE TO CATCH DIODE 200 15 (mV) LEAKAGE AT HIGH T 30 TEMPERATURE CESA 150 10 20 100 V SWITCH V BST CURRENT (mA) IN = 12V CATCH DIODE: NO LOAD INPUT CURRENT (mA) 5 10 CENTRAL SEMI 50 CMSH3-40MA 0 0 0 –50 –25 0 25 50 75 100 125 150 0.0 0.5 1.0 1.5 2.0 2.5 0.0 0.5 1.0 1.5 2.0 2.5 TEMPERATURE (°C) SWITCH CURRENT (A) SWITCH CURRENT (A) 3697 G13 3697 G14 3697 G15
Switch Current Limit Switch Current Limit vs Temperature vs Duty Cycle Switching Frequency
7.0 7 500 RT = 255k 475 6.0 6 450 30% DC 5.0 5 425 70% DC 400 4.0 4 375 CURRENT LIMIT (A) 350 SWITCH CURRENT LIMIT (A) 3.0 3 SWITCHING FREQUENCY (kHz) 325 2.0 2 300 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) DUTY CYCLE (%) TEMPERATURE (°C) 3697 G16 3697 G17 3697 G18 3697f 6 For more information www.linear.com/LT3697