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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LTC4280CUFD 데이터시트(PDF) 3 Page - Linear Technology |
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LTC4280CUFD 데이터시트(HTML) 3 Page - Linear Technology |
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3 / 28 page  LTC4280 3 4280f ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD = 12V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supplies VDD Input Supply Range l 2.9 15 V VOV(VDD) Input Supply Overvoltage Threshold l 15 15.6 16.5 V IDD Input Supply Current l 35 mA VDD(UVL) Input Supply Undervoltage Lockout VDD Rising l 2.75 2.84 2.89 V VDD(HYST) Input Supply Undervoltage Lockout Hysteresis l 75 100 125 mV INTVCC Internal Regulator Voltage VDD ≥ 3.3V l 2.9 3.1 3.4 V INTVCC(UVL) INTVCC Undervoltage Lockout INTVCC Rising l 2.55 2.64 2.79 V INTVCC(HYST) INTVCC Undervoltage Lockout Hysteresis l 20 55 75 mV Current Limit and Circuit Breaker ΔVSENSE(TH) Circuit Breaker Threshold (VDD – VSENSE) l 22.5 25 27.5 mV ΔVSENSE Current Limit Voltage (VDD – VSENSE)VFB = 1.3V VFB = 0V l l 22.5 7 26 10 29.5 13.5 mV mV ISENSE(IN) SENSE +/– Input Current VSENSE = 12V l 10 20 35 μA Gate Drive ΔVGATE External N-Channel Gate Drive (VGATE – VSOURCE) (Note 3) VDD = 2.9V to 15V l 4.7 5.9 6.5 V IGATE(UP) External N-Channel Gate Pull-Up Current Gate On, VGATE = 0V l –15 –20 –30 μA IGATE(DN)SLOW External N-Channel Gate Pulldown Current Gate Off, VGATE = 15V l 0.8 1 1.6 mA IGATE(DN)FAST Pulldown Current From GATE to SOURCE During OC/UVLO VDD – SENSE = 100mV, VGS = 4V l 300 450 700 mA tPHL(SENSE) (VDD – SENSE) High to GATE Low VDD – SENSE = 100mV, CGS = 10nF l 0.5 1 μs VGS(POWERBAD) Gate-Source Voltage for Power Bad Fault VSOURCE = 2.9V – 15V l 3.8 4.3 4.7 V Comparator Inputs VON(TH) ON Pin Threshold Voltage VON Rising l 1.210 1.235 1.26 V ΔVON(HYST) ON Pin Hysteresis l 60 128 180 mV ION(IN) ON Pin Input Current VON = 1.2V l 0 ±1 μA VEN(TH) EN Input Threshold VEN = Rising l 1.215 1.235 1.255 V ΔVEN(HYST) EN Hysteresis l 50 128 200 mV IEN EN Pin Input Current EN = 3.5V l 0 ±1 μA VOV(TH) OV Pin Threshold Voltage VOV Rising l 1.215 1.235 1.255 V ΔVOV(HYST) OV Pin Hysteresis l 10 30 40 mV IOV(IN) OV Pin Input Current VOV = 1.8V l 0 ±1 μA VUV(TH) UV Pin Threshold Voltage VUV Rising l 1.215 1.235 1.255 V ΔVUV(HYST) UV Pin Hysteresis l 60 80 100 mV IUV(IN) UV Pin Input Current VUV = 1.8V l 0 ±1 μA VUV(RTH) UV Pin Reset Threshold Voltage VUV Falling l 0.33 0.4 0.47 V ΔVUV(RHYST) UV Pin Reset Threshold Hysteresis l 60 125 210 mV VFB Foldback Pin Power Good Threshold FB Rising l 1.215 1.235 1.255 V ΔVFB(HYST) FB Pin Power Good Hysteresis l 38 15 mV IFB Foldback Pin Input Current FB = 1.8V l 0 ±1 μA VGPIO(TH) GPIO Pin Input Threshold VGPIO Rising l 0.8 1 1.2 V |
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