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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LT8495 데이터시트(PDF) 4 Page - Linear Technology |
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LT8495 데이터시트(HTML) 4 Page - Linear Technology |
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4 / 34 page  LT8495 4 8495fa For more information www.linear.com/LT8495 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = VSWEN = 12V, VBIAS = VWDE = 5V, unless otherwise noted (Note 2). PARAMETER CONDITIONS MIN TYP MAX UNITS RSTIN Pin Current (Note 7) VRSTIN = 1.2V VRSTIN = 5V VRSTIN = 12V 0 35 240 25 200 550 nA nA nA RSTIN Threshold as % of VFB Regulation Voltage l 86 92 97 % RSTIN Low to RST Asserted (tUV) Step VRSTIN from 1.3V to 0.9V l 8 23 60 µs Watchdog Timeout and Reset Delay Period (tRST) (Note 8) CPOR = 4700pF, Watchdog Timeout Not Occurring at Same Time as the Reset Delay l 8.5 9.5 11.85 ms Watchdog Upper Boundary (tWDU) (Note 8) CWDT = 1000pF l 14.9 16.7 20.9 ms Watchdog Lower Boundary (tWDL) (Note 8) CWDT = 1000pF l 580 650 812 µs RST Output Voltage Low ISINK = 1.25mA ISINK = 100μA, VBIAS = 1.3V, VIN = 0V ISINK = 100μA, VIN = 1.3V, VBIAS = 0V l l l 33 15 15 150 150 150 mV mV mV RST Leakage Current VRSTIN = 1.2V, VRST = 5V (LT8495E, LT8495I) VRSTIN = 1.2V, VRST = 5V (LT8495H) l l 0 0 0.3 1.0 µA μA WDO Output Voltage Low ISINK = 1.25mA l 120 420 mV WDO Leakage Current VWDO = 5V l 0 0.25 μA WDI Pin Current VWDI = 5V 0 0.1 µA WDI Input Rising Threshold l 0.4 0.8 1.25 V WDI Voltage Hysteresis 58 mV WDI Input Pulse Width l 300 ns WDE Pin Current (Note 7) VWDE = 1.2V VWDE = 5V VWDE = 12V 0 35 240 25 200 550 nA nA nA WDE Rising Voltage Threshold l 0.9 1 1.1 V WDE Voltage Hysteresis 30 mV Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Voltages are with respect to GND pin unless otherwise noted. Note 2: The LT8495E is guaranteed to meet performance specifications from 0°C to 125°C junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LT8495I is guaranteed to meet performance specifications from –40°C to 125°C junction temperature. The LT8495H is guaranteed over the full –40°C to 150°C operating junction temperature range. Operating lifetime is derated at junction temperatures greater than 125°C. Note 3: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed the maximum operating range when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. Note 4: See Power Supplies and Operating Limits in the Applications Information section for more details. Note 5: Current limit guaranteed by design and/or correlation to static test. Slope Compensation reduces current limit at higher duty cycles. Note 6: Max duty cycle current limit measured at 1MHz switching frequency. Note 7: Polarity specification for all currents into pins is positive. All voltages are referenced to GND unless otherwise specified. Note 8: This specification is guaranteed for only the exact capacitance as listed in the conditions. Variation of the capacitance from the exact listed value will cause proportional variation to tRST, tWDU and tWDL. |
유사한 부품 번호 - LT8495_15 |
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유사한 설명 - LT8495_15 |
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