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LT8614 Datasheet(PDF) 5 Page - Linear Technology |
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LT8614 Datasheet(HTML) 5 Page - Linear Technology |
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5 / 38 page  LT8603 5 8603f For more information www.linear.com/LT8603 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 LT8603E 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 LT8603I is guaranteed to meet performance specifications from –40°C to 125°C junction temperature. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures above 125°C. PARAMETER CONDITIONS MIN TYP MAX UNITS Channel 4 Feedback Voltage FB4 l 788 800 812 mV FB4 Line Regulation VIN = 3.2V to 42V 0.002 0.01 %/V Input Current FB4 l –100 100 nA Soft-Start Time 1 ms Current Comparator Limit Threshold VISP4 to VISN4, VCM = 2V to 42V l 43 50 57 mV Current Comparator Input Common Mode Range 2 42 V ISP4, ISN4 Input Currents, Sleep VISP4 = VISN4 = 2V to 42V, FB4 = 1V, SYNC = 0V 200 nA ISP4, ISN4 Input Currents, Active VISP4 = VISN4 = 2V to 42V, FB4 = 0V, SYNC = 0V 34 44 μA ISP4, ISN4 Input Currents VISP4 = VISN4 = –42V 7 10 mA GATE4 High Side PMOS On-Resistance 2.5 Ω GATE4 Low Side NMOS On-Resistance 1.25 Ω FB4 Power Good Threshold Percentage of VFB4, VFB4 Falling l 89 92 95 % Power Good Threshold Hysteresis 0.2 % PG4 Output Voltage Low IPG4 = 350μA l 0.13 0.3 V PG4 Leakage Current PG4 = 5V, FB4 = 0.8V l 6 μA Power-On Reset POR Delay Time CPOR = 1000pF l 31 35.2 39.4 ms RST Output Voltage Low IRST = 100μA l 0.1 0.2 V RST Pull-Up Current POR Timed Out, RST = 0V 20 μA RST Leakage Current POR Timed Out, RST = 6V –100 100 nA POREN Threshold l 1.15 1.2 1.25 V POREN Pull-Up Current POREN = 0V 0.6 1.0 1.4 μA The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, EN/UVLO = 3V unless otherwise noted. (Note 2) Note 3: Current limit is assured by design and/or correlation to static test. Slope compensation reduces current limit at higher duty cycles. Note 4: Measurement made using the circuit titled, “Details of Front Page Application” in the Typical Applications section. Note 5: This IC includes overtemperature protection that is intended to protect the device during overload conditions. Junction temperature will exceed 150°C when overtemperature protection is active. Continuous operation above the specified maximum junction temperature will reduce lifetime. |
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