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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT8685SRVPBF датащи(PDF) 4 Page - Analog Devices |
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LT8685SRVPBF датащи(HTML) 4 Page - Analog Devices |
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4 / 24 page  LT8685S 4 Rev. 0 For more information www.analog.com ELECTRICAL CHARACTERISTICS 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. Note 2: The LT8685SR is specified over the –40°C to 150°C operating junction temperature range. High junction temperatures degrade operating lifetimes; operating lifetime is derated for junction temperatures greater than 125°C. Note the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal impedance and other environmental factors. Note 3: This IC includes overtemperature protection that is intended to protect the device during overload conditions. Junction temperature will exceed the maximum operating junction temperature when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature will reduce lifetime. PARAMETER CONDITIONS MIN TYP MAX UNITS Power FET On-resistance Main Switch (Top) Synchronous Switch (Bottom) ISW3, ISW4 = 0.1A ISW3, ISW4 = 0.1A 45 25 mΩ mΩ EN3, EN4 Threshold EN3, EN4 Falling l 0.78 0.81 0.84 V EN3, EN4 Hysteresis 50 mV EN3, EN4 Input Current VEN3, VEN4 = 42V –250 0 250 nA Pgood Upper Threshold Offset from VFB3, VFB4 VFB3, VFB4 Rising l 4.5 7.5 10 % Pgood Lower Threshold Offset from VFB3, VFB4 VFB3, VFB4 Falling l –10 –7.5 –4.5 % Pgood Hysteresis 1.2 % Pgood Leakage VPG3, VPG4 = 6V –250 0 250 nA Pgood Pull-Down Resistance VPG3, VPG4 = 0.1V 500 1200 Ω TRK/SS3, TRK/SS4 Pull-Up Current VTRK/SS3, VTRK/SS4 = 0V 2 µA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN1 = VIN2 = 12V, VIN3 = VIN4 = 5V, fSW = 2MHz unless otherwise specified. |
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