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LTC4261IUFD-2 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4261IUFD-2 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 32 page  LTC4261/LTC4261-2 3 42612fb The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at IIN = 5mA, TA = 25°C. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS General VZ Shunt Regulator Voltage at VIN IIN = 5mA ● 10.65 11.2 11.8 V ΔVZ Shunt Regulator Load Regulation IIN = 5mA to 25mA ● 370 600 mV IIN VIN Supply Current VIN = VZ – 0.3V ● 25 mA VIN(UVLO) VIN Undervoltage Lockout Threshold VIN Rising ● 8.599.5 V ΔVIN(UVLO) VIN Undervoltage Lockout Hysteresis ● 0.3 0.7 1 V INTVCC Internal Regulator Voltage ILOAD = 1mA to 20mA, IIN = 25mA ● 4.75 5 5.25 V Gate Drive VGATEH GATE Pin Output High Voltage VIN = 10.65V ● 10 10.25 10.5 V IGATE(UP) GATE Pin Pull-Up Current VGATE = 4V ● –7.5 –11.5 –15.5 µA IGATE(OFF) GATE Turn-Off Current VSENSE = 300mV, VGATE = 4V ● 60 110 140 mA Gate Off, VGATE = 4V ● 60 110 140 mA tPHL(SENSE) SENSE High to Current Limit VSENSE = 100mV, CGATE = 1pF ● 0.5 1.5 µs Propagation Delay VSENSE = 300mV, CGATE = 1pF ● 0.2 0.5 µs tPHL(GATE) GATE Off Propagation Delay Input High (OV, EN, PGI), Input Low (ON, UVL), CGATE = 1pF ● 0.2 0.5 µs tPHLCB Circuit Breaker Gate Off Delay VGATE < 2V, CGATE = 1pF ● 440 530 620 µs IRAMP RAMP Pin Current VSS = 2.56V ● –18 –20 –22 µA VSS SS Pin Clamp Voltage ● 2.43 2.56 2.69 V ISS(UP) SS Pin Pull-Up Current VSS = 0V ● –7 –10 –13 µA ISS(DN) SS Pin Pull-Down Current VSS = 2.56V ● 612 20 mA Input Pins VUVH(TH) UVH Threshold Voltage VUVH Rising LTC4261C LTC4261I ● ● 2.534 2.522 2.56 2.56 2.586 2.598 V VUVL(TH) UVL Threshold Voltage VUVL Falling LTC4261C LTC4261I ● ● 2.263 2.254 2.291 2.291 2.319 2.328 V ΔVUV(HYST) Built-In UV Hysteresis UVH and UVL Tied Together ● 256 269 282 mV δVUV UVH, UVL Minimum Hysteresis 15 mV VUVLR(TH) UVL Reset Threshold Voltage VUVL Falling ● 1.12 1.21 1.30 V ΔVUVLR(HYST) UVL Reset Hysteresis 60 mV VOV(TH) OV Pin Threshold Voltage VOV Rising LTC4261C LTC4261I ● ● 1.744 1.735 1.770 1.770 1.796 1.805 V ΔVOV(HYST) OV Pin Hysteresis ● 18 37.5 62 mV ΔVSENSE Current Limit Sense Voltage Threshold VSENSE – VEE ● 45 50 55 mV VINPUT(TH) ON, EN, PGI, FLTIN Threshold Voltage ON, EN, PGI, FLTIN Falling or Rising ● 0.8 1.4 2 V ΔVINPUT(HYST) ON, EN, PGI, FLTIN Hysteresis 170 mV VPGIO(TH) PGIO Pin Input Threshold Voltage VPGIO Rising ● 1.10 1.25 1.40 V ΔVPGIO(HYST) PGIO Pin Input Hysteresis 100 mV IINPUT ON, EN, UVH, UVL, OV, SENSE, PGI, FLTIN Input Current ON, EN, UVH, UVL, OV, SENSE, PGI, FLTIN = 3V ● 0±2 µA ELECTRICAL CHARACTERISTICS |
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