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LTC4413 Datasheet(PDF) 4 Page - Analog Devices |
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LTC4413 Datasheet(HTML) 4 Page - Analog Devices |
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4 / 32 page  LTC4421 4 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. See the LTC4421 Data Sheet Nomenclature section for more details on pin conditions. V1 = 12V, V2 = 13V, EXTVCC = CPOREF = OUT1 = OUT2 = SENSE1 = SENSE2 = 11V, OV1 = OV2 = TMR1 = TMR2 = OV, UVR1 = UVR2 = UVF1 = UVF2 = DISABLE1 = DISABLE2 = SHDN = RETRY = CASIN = 4V, CPO = 23.5V, QUAL = INTVCC, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IGATE(OFF,REV) GATE Off Pull-Down Current, Negative Sense Voltage V(SENSE)–V(OUT) = –50mV, GATE = 16V, OUT = 10V, V1 = V2 = 12V l 30 50 92 mA ΔVSNS Current Limit Sense Voltage, ΔVSNS = (SENSE – OUT) OUT = 1V, 12V, 32V EXTVCC = 3.0V, OUT = 1V l l 20 20 25 25 30 30 mV mV ΔVSNS,FLD Current Limit Sense Voltage in Foldback, ΔVSNS,FLD = (SENSE – OUT) OUT = 0V l 7.5 12.5 17.5 mV VFLD,TH Foldback Threshold Voltage OUT1 l 380 480 580 mV VFLD,HYST Foldback Hysteresis 50 mV VSNSDIS,FWD Forward Overcurrent Disconnect Voltage SENSE – OUT, Rising 50 mV VSNSDIS,REV Reverse Current Disconnect Voltage SENSE – OUT, Falling –30 mV ISNS SENSE Input Current SENSE = OUT = 12V l ±1 μA tG(SWITCH) Gate Break-Before-Make Time CGATE = 47nF l 10.3 15 µs tPG(DIS, OFF) Gate Turn-Off Delay from DISABLE Falling DISABLE to Gate < 12V l 1.4 2.7 µs tPG(DIS, ON) Gate Turn-On Delay from DISABLE Rising DISABLE to Gate > 12V l 1.3 2.1 µs tPG(CAS) CASIN to CASOUT Propagation Delay High-to-Low 1 μs tPG(DIS, CAS) DISABLE to CASOUT Propagation Delay DISABLE High-to-Low 2.8 µs CURRENT LIMIT TIMER (TMR1, TMR2) ITMR(UP) TMR Pull-Up Current l –3 –6 –9 µA ITMR(DN) TMR Pull-Down Current l 1 2 3 µA tTMR,FLT TMR Fault Time CTMR = 10nF l 550 830 1250 µs %TMR(COOL) TMR Cool Down Ratio to Fault Time 0.1 % OV, UV PROTECTION CIRCUITRY (OV1, OV2, UVF1, UVF2, UVR1, UVR2, QUAL) VTH,OVUV OV, UV Threshold Voltage OV Rising, UVF Falling, UVR Rising l 490 500 510 mV VHYST, OV OV Hysteresis l 40 50 60 mV ILK,OVUV UVR, UVF, OV Input Leakage Current V = 0.5V l ±10 nA IQUAL,SRC QUAL Source Current l –1 –2 –3 µA IQUAL,SNK QUAL Sink Current l 1 2 3 µA tVALID OV, UV Validation Time QUAL = INTVCC CQUAL = 470pF l l 1.75 5 5 7.5 8 11 µs ms tINVALID OV, UV Invalidation Filter Time Overdrive = 50mV l 1.75 5 8 µs DIGITAL INPUTS (DISABLE1, DISABLE2, SHDN, CASIN, RETRY) VTH Rising Threshold Voltage l 0.5 1.0 1.5 V VHYST Hysteresis Voltage 150 mV ILK,HV Input Leakage Current V = 36V, DISABLE, SHDN l ±0.1 ±1 µA ILK,LV Input Leakage Current V = 5.5V, CASIN Retry = INTVCC l l ±0.1 ±0.1 ±1 ±1 µA µA ICASIN CASIN Pull-Up Current CASIN = 0V l 2.5 5 10 µA |
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