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LTC4215 Datasheet(数据表) 3 Page - Linear Technology |
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LTC4215 Datasheet(HTML) 3 Page - Linear Technology |
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3 page 
LTC4215 3 4215fb SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supplies VDD Input Supply Range ● 2.9 15 V VOV(VDD) Input Supply Overvoltage Threshold ● 15 15.6 16.5 V IDD Input Supply Current ● 35 mA VDD(UVL) Input Supply Undervoltage Lockout VDD Rising ● 2.75 2.84 2.89 V VDD(HYST) Input Supply Undervoltage Lockout Hysteresis ● 75 100 125 mV INTVCC Internal Regulator Voltage VDD ≥ 3.3V ● 2.9 3.1 3.4 V INTVCC(UVL) INTVCC Undervoltage Lockout INTVCC Rising ● 2.55 2.64 2.79 V INTVCC(HYST) INTVCC Undervoltage Lockout Hysteresis ● 20 55 75 mV Current Limit and Circuit Breaker ΔVSENSE(TH) Circuit Breaker Threshold (VDD – VSENSE) ● 22.5 25 27.5 mV ΔVSENSE Current Limit Voltage (VDD – VSENSE)VFB = 1.3V VFB = 0V Start-Up Timer Expired ● ● ● 22 6.5 65 25 10 75 29 13 90 mV mV mV tD(OC) OC Fault Filter ΔVSENSE = 50mV ● 15 20 30 µs ISENSE(IN) SENSE Pin Input Current VSENSE = 12V ● 10 20 35 µA Gate Drive ΔVGATE External N-Channel Gate Drive (VGATE – VSOURCE) (Note 3) VDD = 2.9V to 15V ● 4.7 5.9 6.5 V IGATE(UP) External N-Channel Gate Pull-Up Current Gate On, VGATE = 0V ● –15 –20 –30 µA IGATE(DN)SLOW External N-Channel Gate Pulldown Current Gate Off, VGATE = 15V ● 0.8 1 1.6 mA IGATE(DN)FAST Pulldown Current From GATE to SOURCE During OC/UVLO VDD – SENSE = 100mV, VGS = 4V ● 300 450 700 mA tPHL(SENSE) (VDD – SENSE) High to GATE Low VDD – SENSE = 100mV, CGS = 10nF ● 0.5 1 µs VGS(POWERBAD) Gate-Source Voltage for Power Bad Fault VSOURCE = 2.9V – 15V ● 3.8 4.3 4.7 V Comparator Inputs VON(TH) ON Pin Threshold Voltage VON Rising ● 1.210 1.235 1.26 V ΔVON(HYST) ON Pin Hysteresis ● 60 128 180 mV ION(IN) ON Pin Input Current VON = 1.2V ● 0±1 µA V⎯E⎯N(TH) ⎯E⎯N Input Threshold V⎯E⎯N = Rising ● 1.215 1.235 1.255 V ΔV⎯E⎯N(HYST) ⎯E⎯N Hysteresis ● 50 128 200 mV I⎯E⎯N ⎯E⎯N Pin Input Current ⎯E⎯N = 3.5V ● 0±1 µA VOV(TH) OV Pin Threshold Voltage VOV Rising ● 1.215 1.235 1.255 V ΔVOV(HYST) OV Pin Hysteresis ● 10 30 40 mV IOV(IN) OV Pin Input Current VOV = 1.8V ● 0±1 µA VUV(TH) UV Pin Threshold Voltage VUV Rising ● 1.215 1.235 1.255 V ΔVUV(HYST) UV Pin Hysteresis ● 60 80 100 mV IUV(IN) UV Pin Input Current VUV = 1.8V ● 0±1 µA VUV(RTH) UV Pin Reset Threshold Voltage VUV Falling ● 0.33 0.4 0.47 V ΔVUV(RHYST) UV Pin Reset Threshold Hysteresis ● 60 125 210 mV VFB Foldback Pin Power Good Threshold FB Rising ● 1.215 1.235 1.255 V ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VDD = 12V unless otherwise noted. |
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