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LTC4236 数据表(PDF) 4 Page - Linear Technology |
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LTC4236 数据表(HTML) 4 Page - Linear Technology |
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4 / 24 page  LTC4236 4 4236f For more information www.linear.com/LTC4236 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Inputs VD2OFF(H,TH) D2OFF Pin High Threshold D2OFF Rising l 1.21 1.235 1.26 V VD2OFF(L,TH) D2OFF Pin Low Threshold D2OFF Falling l 1.19 1.215 1.24 V ∆VD2OFF(HYST) D2OFF Pin Hysteresis l 10 20 30 mV VIN(TH) ON, FB Pin Threshold Voltage Voltage Rising l 1.21 1.235 1.26 V ∆VON(HYST) ON Pin Hysteresis l 40 80 120 mV ∆VFB(HYST) FB Pin Hysteresis l 10 20 30 mV VON(RESET) ON Pin Fault Reset Threshold Voltage ON Falling l 0.57 0.6 0.63 V IIN(LEAK) Input Leakage Current (ON, FB, D2OFF) V = 5V l 0 ±1 µA VEN(TH) EN Pin Threshold Voltage EN Rising l 1.185 1.235 1.284 V ∆VEN(HYST) EN Pin Hysteresis l 60 110 200 mV IEN(UP) EN Pull-Up Current EN = 1V l –7 –10 –13 µA VTMR(H) FTMR, DTMR Pin High Threshold l 1.198 1.235 1.272 V VTMR(L) FTMR, DTMR Pin Low Threshold l 0.15 0.2 0.25 V IFTMR(UP) FTMR Pull-Up Current FTMR = 1V, In Fault Mode l –80 –100 –120 µA IFTMR(DN) FTMR Pull-Down Current FTMR = 2V, No Faults l 1.3 2 2.7 µA DRETRY Auto-Retry Duty Cycle l 0.07 0.15 0.23 % IDTMR(UP) DTMR Pull-Up Current DTMR = 0.6V l –8 –10 –12 µA IDTMR(DN) DTMR Pull-Down Current DTMR = 1.5V l 1 5 10 mA ∆VDTMR(TH) DTMR Pin Threshold Voltage (VDTMR – VINTVCC) tD(HGATE) Start-Up Delay l –0.1 –0.3 –0.5 V tRST(ON) ON Low to FAULT High l 20 40 µs tPG(FB) FB Low to PWRGD High l 20 40 µs Outputs IOUT OUT Pin Current OUT = 11V, IN = 12V, ON = 2V OUT = 13V, IN = 12V, ON = 2V l l 40 2.5 100 4 µA mA VOL Output Low Voltage (FAULT, PWRGD, DSTAT1, DSTAT2) I = 1mA I = 3mA l l 0.15 0.4 0.4 1.2 V V VOH Output High Voltage (FAULT, PWRGD) I = –1µA l INTVCC – 1 INTVCC– 0.5 V IOH Input Leakage Current (FAULT, PWRGD, DSTAT1, DSTAT2) V = 18V l 0 ±1 µA IPU Output Pull-Up Current (FAULT, PWRGD) V = 1.5V l –7 –10 –13 µA Current Monitor ∆VREG Floating Regulator Voltage (VSENSE+ – VREG) IREG = ±1µA l 3.6 4.1 4.6 V ∆VSENSE(FS) Input Sense Voltage Full Scale (VSENSE+ – VSENSE–) SENSE+ = 12V l 25 mV VIMON(OS) IMON Input Offset Voltage ∆VSENSE = 0V l ±150 µV GIMON IMON Voltage Gain ∆VSENSE = 20mV and 5mV l 99 100 101 V/V VIMON(MAX) IMON Maximum Output Voltage ∆VSENSE = 70mV, 5V ≤ SENSE+ ≤ 18V ∆VSENSE = 35mV, SENSE+ = 2.9V l l 3.5 2.7 5.5 2.9 V V VIMON(MIN) IMON Minimum Output Voltage ∆VSENSE = 200µV l 40 mV RIMON(OUT) IMON Output Resistance ∆VSENSE = 200µV l 15 20 27 kΩ elecTrical characTerisTics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, unless otherwise noted. |
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