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LTC3624 Datasheet(PDF) 4 Page - Linear Technology |
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LTC3624 Datasheet(HTML) 4 Page - Linear Technology |
4 / 20 page LTC3624/LTC3624-2 4 36242fc For more information www.linear.com/LTC3624 The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TJ = 25°C. (Note 2) VIN = 12V, unless otherwise noted. 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 LTC3624/LTC3624-2 is tested under pulsed load conditions such that TJ ≈ TA. The LTC3624E/LTC3624E-2 is guaranteed to meet 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 LTC3624I/LTC3624I-2 is guaranteed over the –40°C to 125°C operating junction temperature range and the LTC3624H is guaranteed over the –40°C to 150°C operating junction temperature range. High junction temperatures degrade operating lifetimes; operation lifetime is decreased for junction temperatures greater than 125°C. Note that 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. TJ is calculated from the ambient, TA, and power dissipation, PD, according to the following formula: TJ = TA + (PD • θJA) Note 3: The quiescent current in forced continuous mode does not include switching loss of the power FETs. Note 4: The LTC3624 is tested in a proprietary test mode that servos FB to the output of the error amplifier. Note 5: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. The maximum rated junction temperature will be exceeded when overtemperature protection is active Continuous operation above the specified maximum operating junction temperature may impair device reliability. The overtemperature protection level is not production tested but guaranteed by design. elecTrical characTerisTics SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VMODE/SYNC Pulse-Skipping Mode Burst Mode Operation Forced Continuous Mode VINTVCC – 0.4 1.0 0.3 VINTVCC – 1.2 V V V IMODE/SYNC MODE/SYNC Input Current 0 100 nA tSS Internal Soft-Start Time 1 ms ILIM Peak Current Limit VIN > 5V (E-, I-Grade) VIN > 5V (H-Grade) l l 2.4 2.3 3 3.6 A A IFB FB Input Current 10 nA IFB(VOUT) Feedback Input Leakage Current Fixed Output Versions 2 10 µA VUVLO VINTVCC Undervoltage Lockout VIN Ramping Up 2.4 2.6 2.7 V VUVLO(HYS) VINTVCC Undervoltage Lockout Hysteresis 175 mV VOVLO VIN Overvoltage Lockout Rising l 18 19 20 V VOVLO(HYS) VIN Overvoltage Lockout Hysteresis 500 mV fOSC Oscillator Frequency LTC3624/LTC3624-3.3/LTC3624-5 (E-, I-Grade) (H-Grade) l l 0.92 0.82 0.78 1.00 1.08 1.16 MHz MHz MHz LTC3624-2/LTC3624-23.3/LTC3624-25 (E-, I-Grade) (H-Grade) l l 2.05 1.8 1.7 2.25 2.45 2.6 MHz MHz MHz fSYNC SYNC Capture Range LTC3624/LTC3624-3.3/LTC3624-5 50 150 % LTC3624-2/LTC3624-23.3/LTC3624-25 50 140 % VINTVCC VINTVCC LDO Output Voltage VIN > 4V 3.2 3.6 4.0 V ΔVPGOOD Power Good Range LTC3624/LTC3624-2 ±7.5 ±11.5 % LTC3624-3.3/LTC3624-5/LTC3624-23.3/ LTC3624-25 ±7.5 ±13 % RPGOOD Power Good Resistance 280 350 Ω tPGOOD PGOOD Delay PGOOD Low to High PGOOD High to Low 0 32 Cycles Cycles |
Similar Part No. - LTC3624_15 |
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