LTC3633A/LTC3633A-1 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operatingjunction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VIN1 = VIN2 = 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 is tested under pulsed load conditions such Note 3: This IC includes overtemperature protection that is intended that TJ ≈ TA. The LTC3633AE is guaranteed to meet specifications from to protect the device during momentary overload conditions. Junction 0°C to 85°C junction temperature. Specifications over the –40°C to temperature will exceed 125°C when overtemperature protection is active. 125°C operating junction temperature range are assured by design, Continuous operation above the specified maximum operating junction characterization and correlation with statistical process controls. The temperature may impair device reliability. LTC3633AI is guaranteed over the full –40°C to 125°C operating junction Note 4: Output voltages outside the specified range are not optimized for temperature range. Note that the maximum ambient temperature controlled on-time operation. Refer to the Applications Information section consistent with these specifications is determined by specific operating for further discussions related to the output voltage range. conditions in conjunction with board layout, the rated package thermal impedance and other environmental factors. The junction temperature Note 5: Dynamic supply current is higher due to the internal gate charge being delivered at the switching frequency. 3633a1fb 4 For more information www.linear.com/LTC3633A 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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