LTC3633A-2/LTC3633A-3 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operatingjunction temperature range, otherwise specifications are at TJ = 25°C (Note 2). PVIN1 = PVIN2 = SVIN = 12V unless otherwise noted. SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS VPHMODE PHMODE Threshold Voltage PHMODE VIH 1 V PHMODE VIL 0.3 V VMODE/SYNC MODE/SYNC Threshold Voltage MODE VIH 1 V MODE VIL 0.4 V SYNC Threshold Voltage SYNC VIH 0.95 V IMODE MODE/SYNC Input Current MODE = 0V 1.5 µA MODE = INTVCC –1.5 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings (TJ, in °C) is calculated from the ambient temperature (TA, in °C) and may cause permanent damage to the device. Exposure to any Absolute power dissipation (PD, in Watts) according to the formula: Maximum Rating condition for extended periods may affect device TJ = TA + (PD • θJA), where θJA (in °C/W) is the package thermal reliability and lifetime. impedance. Note 2: The LTC3633A-2/LTC3633A-3 is tested under pulsed load Note 3: This IC includes overtemperature protection that is intended conditions such that TJ ≈ TA. The LTC3633AE-2/ LTC3633AE-3 is to protect the device during momentary overload conditions. Junction guaranteed to meet specifications from 0°C to 85°C junction temperature. temperature will exceed 125°C when overtemperature protection is active. Specifications over the –40°C to 125°C operating junction temperature Continuous operation above the specified maximum operating junction range are assured by design, characterization and correlation with temperature may impair device reliability. statistical process controls. The LTC3633AI-2/ LTC3633AI-3 is guaranteed Note 4: Output voltages outside the specified range are not optimized for over the full –40°C to 125°C operating junction controlled on-time operation. Refer to the Applications Information section temperature range. Note that the maximum ambient temperature for further discussions related to the output voltage range. consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal Note 5: Dynamic supply current is higher due to the internal gate charge impedance and other environmental factors. The junction temperature being delivered at the switching frequency. 3633a23fb 4 For more information www.linear.com/LTC3633A-2 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Typical Application Related Parts
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