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LTC3827EUH Datasheet(PDF) 4 Page - Linear Technology |
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LTC3827EUH Datasheet(HTML) 4 Page - Linear Technology |
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4 / 36 page  LTC3827 4 3827ff 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 LTC3827E is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3827I is guaranteed to meet performance specifications over the full –40°C to 85°C operating temperature range. Note 3: TJ is calculated from the ambient temperature TA and power dissipation PD according to the following formulas: TJ = TA + (PD • 34 °C/W) Note 4: The LTC3827 is tested in a feedback loop that servos VITH1, 2 to a specified voltage and measures the resultant VFB1, 2. Note 5: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Applications Information. Note 6: Rise and fall times are measured using 10% and 90% levels. Delay times are measured using 50% levels. Note 7: The minimum on-time condition is specified for an inductor peak-to-peak ripple current ≥ 40% of IMAX (see minimum on-time considerations in the Applications Information section). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS fSYNCMAX Maximum Synchronizable Frequency PLLIN/MODE = External Clock; VPLLLPF = 2V 650 800 kHz IPLLLPF Phase Detector Output Current Sinking Capability Sourcing Capability fPLLIN/MODE < fOSC fPLLIN/MODE > fOSC –5 5 μA μA PGOOD Output VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±1 μA VPG PGOOD Trip Level VFB with Respect to Set Regulated Voltage VFB Ramping Negative VFB Ramping Positive –12 8 –10 10 –8 12 % % ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VRUN/SS1, 2 = 5V unless otherwise noted. |
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