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LTC7802EUFDM 数据表(PDF) 3 Page - Analog Devices |
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LTC7802EUFDM 数据表(HTML) 3 Page - Analog Devices |
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3 / 34 page  LTC7802 3 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply (VIN) VIN Input Supply Operating Range 4.5 40 V IVIN VIN Current in Regulation Front Page Circuit, 14V to 3.3V, No Load, RUN2 = 0V 14 µA Controller Operation VOUT1,2 Output Voltage Operating Range 0.8 40 V VFB1,2 Regulated Feedback Voltage (Note 4) VIN = 4.5V to 40V, ITH1,2 Voltage = 0.6V to 1.2V 0°C to 85°C, All Grades l 0.788 0.792 0.800 0.800 0.812 0.808 V V Feedback Current ±5 ±50 nA Feedback Overvoltage Protection Threshold Measured at VFB1,2 Relative to Regulated VFB1,2 7 10 13 % gm1,2 Transconductance Amplifier gm (Note 4) ITH1,2 = 1.2V, Sink/Source = 5μA 1.8 mmho VSENSE(MAX) Maximum Current Sense Threshold VFB1,2 = 0.7V, VSENSE1,2– = 3.3V l 45 50 55 mV Matching Between Channels VSENSE1,2– = 3.3V –3.5 0 3.5 mV ISENSE1,2+ SENSE1, 2+ Pin Current VSENSE1,2+ = 3.3V ±1 µA ISENSE1– SENSE1– Pin Current VSENSE1– ≤ 2.8V 3.2V ≤ VSENSE1– < INTVCC – 0.5V VSENSE1– > INTVCC + 0.5V 1 50 700 µA µA µA ISENSE2– SENSE2– Pin Current VSENSE2– = 3.3V VSENSE2– > INTVCC + 0.5V 650 ±2 µA µA Soft-Start Charge Current VTRACK/SS1,2 = 0V 10 12.5 15 µA RUN Pin ON Threshold VRUN1,2 Rising l 1.15 1.20 1.25 V RUN Pin Hysteresis 100 mV DC Supply Current (Note 5) VIN Shutdown Current RUN1,2 = 0V 1.5 µA VIN Sleep Mode Current VSENSE1– < 3.2V, EXTVCC = 0V One Channel On Both Channels On 15 18 24 30 µA µA Sleep Mode Current (Note 3) Only Channel 1 On VSENSE1– ≥ 3.2V VIN Current, EXTVCC = 0V VIN Current, EXTVCC ≥ 4.8V EXTVCC Current, EXTVCC ≥ 4.8V SENSE1– Current 5 1 5 10 9 4 10 18 µA µA µA µA Sleep Mode Current (Note 3) Both Channels On VSENSE1– ≥ 3.2V, EXTVCC ≥ 4.8V VIN Current EXTVCC Current SENSE1– Current 1 7 12 4 14 22 µA µA µA Pulse-Skipping or Forced Continuous Mode VIN or EXTVCC Current (Note 3) One Channel On Both Channels On 2 3 mA mA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, RUN1,2 > 1.25V, EXTVCC = 0V, unless otherwise noted. (Note 2) |
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