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LTC3565IMSE Datasheet(PDF) 3 Page - Linear Technology |
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LTC3565IMSE Datasheet(HTML) 3 Page - Linear Technology |
3 / 22 page LTC3565 3565fa electrical characteristics The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TJ = 25°C. VIN = 3.6V, RT = 125k unless otherwise specified. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS IS Input DC Supply Current (Note 4) Active Mode Sleep Mode Shutdown VSYNC/MODE = 3.6V, VFB = 0.55V VSYNC/MODE = 3.6V, VFB = 0.8V VRUN = 0V 330 40 0.1 450 60 1 µA µA µA fOSC Oscillator Frequency RT = 125k (Note 7) 1.3 1.5 1.7 4 MHz MHz fSYNC Synchronization Frequency (Note 7) 0.4 4 MHz ILIM Peak Switch Current Limit VIN = 3V, VFB = 0.5V 1.5 2.1 2.5 A RDS(ON) Top Switch On-Resistance MSE Package DD Package (Note 6) 0.15 0.15 0.2 Ω Ω Bottom Switch On-Resistance MSE Package DD Package (Note 6) 0.13 0.13 0.18 Ω Ω ISW(LKG) Switch Leakage Current VIN = 5.5V, VRUN = 0V, VFB = 0V 0.01 1 µA VRUN RUN Threshold l 0.3 0.8 1.5 V IRUN RUN Leakage Current l ±0.01 ±1 µA VUVLO Undervoltage Lockout Threshold VIN Ramping Down 1.9 2.2 V PGOOD Power Good Threshold VFB Ramping Up from 0.45V to 0.6V VFB Ramping Down from 0.69V to 0.6V –7 7 % % RPGOOD Power Good Pull-Down On-Resistance 15 20 Ω PGOOD Blanking VFB Step from 0V to 0.6V VFB Step from 0.6V to 0V 40 105 µs µs VSYNC-MODE Pulse Skip Force Continuous Burst 1.1 VIN – 0.75 0.63 VIN – 1.05 V V V tSOFT-START 10% to 90% of Regulation 0.6 0.9 1.2 ms 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 LTC3565E is guaranteed to meet performance specifications from 0°C to 85°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 LTC3565I is guaranteed over the full –40°C to 125°C operating junction temperature range. Note that the maximum ambient temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. Note 3: The LTC3565 is tested in a feedback loop which servos VFB to the midpoint for the error amplifier (VITH = 0.7V). Note 4: Dynamic supply current is higher due to the internal gate charge being delivered at the switching frequency. Note 5: TJ is calculated from the ambient TA and power dissipation PD according to the following formulas: LTC3565EDD: TJ = TA + (PD • 43°C/W) LTC3565EMSE: TJ = TA + (PD • 40°C/W) Note 6: Switch on-resistance is guaranteed by correlation to wafer level measurements and assured by design characterization and correlation with statistical process controls. Note 7: 4MHz operation is guaranteed by design but not production tested and is subject to duty cycle limitations (see Applications Information). Note 8: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. |
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