Datasheet LT3697 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | USB 5V, 2.5A Output, 35V Input Buck with Cable Drop Compensation |
| 页数 / 页 | 32 / 3 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 451 Kb |
| 文件语言 | 英语 |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LT3697
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VEN = 12V unless otherwise noted. (Notes 3, 6) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Undervoltage Lockout l 4.2 4.8 V VIN Overvoltage Lockout l 35.5 37 39.5 V Dropout Comparator Threshold (VIN – VSYS) Falling, VIN = 5V 550 650 750 mV Dropout Comparator Hysteresis 200 mV VIN Current VSYS = 5V, VEN = 0.3V 0.01 2 μA VSYS = 5V, Not Switching 0.5 0.75 1.0 mA VSYS = 0V, Not Switching 0.8 1.1 1.4 mA SYS Current VEN = 0.3V 9 13 μA VSYS = 5V, Not Switching 200 300 500 μA VSYS = 0V, Not Switching –75 –120 μA USB5V Voltage l 4.95 4.99 5.03 V USB5V Line Regulation 6V < VIN < 35V l 1 5 mV USB5V Current VSENSE = 50mV, RCBL = 16.5k l 58 60 62 μA VSENSE = 10mV, RCBL = 16.5k l 11 13 15 μA VSENSE = 0V, RCBL = 16.5k l 0 3 μA RCBL Voltage VSENSE = 50mV, RCBL = 16.5k 960 1000 1030 mV VSENSE = 10mV, RCBL = 16.5k 180 210 240 mV VSENSE = 0V, RCBL = 16.5k 0 50 mV RCBL Current Limit VRCBL = 0V, VSENSE = 50mV 200 300 400 μA SYS Voltage VUSB5V = 0V l 6.0 6.1 6.2 V SYS Voltage to Disable Switching VUSB5V = 0V 6.5 6.8 7.1 V SENSE Voltage (Note 7) VISP = 5V, RLIM = Open l 56.5 60.5 64.5 mV VISP = 0V, RLIM = Open l 20 105 mV VISP = 5V, RLIM = 56.2k l 33 35.2 37.5 mV VISP = 5V, RLIM = 29.4k l 18 20.5 23 mV ISP and ISN Bias Current VISP, VISN = 5V 20 30 μA VISP, VISN = 0V –1.1 –1.6 mA RLIM Current VRLIM = 1.2V –9 –11 –13 μA Active Load Current from SYS VSYS = 5V 120 180 240 mA USB5V Voltage Offset to Enable Active Load VUSB5V Rising 0.5 1.5 3 % SYS Voltage Threshold to Disable Active Load VSYS Rising 6.6 7.2 7.8 V Error Amp gm 400 mS Error Amp Gain 500 V/V VC Source Current VVC = 1.3V –80 μA VC Sink Current VVC = 1.3V 80 μA VC to Switch gm 5 A/V VC Clamp Voltage 1.8 V 3697f 3 For more information www.linear.com/LT3697
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VEN = 12V unless otherwise noted. (Notes 3, 6) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Undervoltage Lockout l 4.2 4.8 V VIN Overvoltage Lockout l 35.5 37 39.5 V Dropout Comparator Threshold (VIN – VSYS) Falling, VIN = 5V 550 650 750 mV Dropout Comparator Hysteresis 200 mV VIN Current VSYS = 5V, VEN = 0.3V 0.01 2 μA VSYS = 5V, Not Switching 0.5 0.75 1.0 mA VSYS = 0V, Not Switching 0.8 1.1 1.4 mA SYS Current VEN = 0.3V 9 13 μA VSYS = 5V, Not Switching 200 300 500 μA VSYS = 0V, Not Switching –75 –120 μA USB5V Voltage l 4.95 4.99 5.03 V USB5V Line Regulation 6V < VIN < 35V l 1 5 mV USB5V Current VSENSE = 50mV, RCBL = 16.5k l 58 60 62 μA VSENSE = 10mV, RCBL = 16.5k l 11 13 15 μA VSENSE = 0V, RCBL = 16.5k l 0 3 μA RCBL Voltage VSENSE = 50mV, RCBL = 16.5k 960 1000 1030 mV VSENSE = 10mV, RCBL = 16.5k 180 210 240 mV VSENSE = 0V, RCBL = 16.5k 0 50 mV RCBL Current Limit VRCBL = 0V, VSENSE = 50mV 200 300 400 μA SYS Voltage VUSB5V = 0V l 6.0 6.1 6.2 V SYS Voltage to Disable Switching VUSB5V = 0V 6.5 6.8 7.1 V SENSE Voltage (Note 7) VISP = 5V, RLIM = Open l 56.5 60.5 64.5 mV VISP = 0V, RLIM = Open l 20 105 mV VISP = 5V, RLIM = 56.2k l 33 35.2 37.5 mV VISP = 5V, RLIM = 29.4k l 18 20.5 23 mV ISP and ISN Bias Current VISP, VISN = 5V 20 30 μA VISP, VISN = 0V –1.1 –1.6 mA RLIM Current VRLIM = 1.2V –9 –11 –13 μA Active Load Current from SYS VSYS = 5V 120 180 240 mA USB5V Voltage Offset to Enable Active Load VUSB5V Rising 0.5 1.5 3 % SYS Voltage Threshold to Disable Active Load VSYS Rising 6.6 7.2 7.8 V Error Amp gm 400 mS Error Amp Gain 500 V/V VC Source Current VVC = 1.3V –80 μA VC Sink Current VVC = 1.3V 80 μA VC to Switch gm 5 A/V VC Clamp Voltage 1.8 V 3697f 3 For more information www.linear.com/LT3697