LT8494 ELECTRICAL CHARACTERISTICS Note 1: Stresses beyond those listed under Absolute Maximum Ratings Junction temperature will exceed the maximum operating range when may cause permanent damage to the device. Exposure to any Absolute overtemperature protection is active. Continuous operation above the Maximum Rating condition for extended periods may affect device specified maximum operating junction temperature may impair device reliability and lifetime. Voltages are with respect to GND pin unless reliability. otherwise noted. Note 4: See Power Supplies and Operating Limits in the Applications Note 2: The LT8494E is guaranteed to meet performance specifications Information section for more details. from 0°C to 125°C junction temperature. Specifications over the –40°C Note 5: Current limit guaranteed by design and/or correlation to static test. to 125°C operating junction temperature range are assured by design, Slope Compensation reduces current limit at higher duty cycles. characterization and correlation with statistical process controls. The Note 6: Max duty cycle current limit measured at 1MHz switching LT8494I is guaranteed to meet performance specifications from –40°C frequency. to 125°C junction temperature. The LT8494H is guaranteed over the full –40°C to 150°C operating junction temperature range. Operation lifetime is Note 7: Polarity specification for all currents into pins is positive. All derated at junction temperatures greater than 125°C. voltages are referenced to GND unless otherwise specified. Note 3: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise specified.No-Load Supply CurrentMaximum Load CurrentLoad Regulation 100 2.5 0.15 FRONT PAGE APPLICATION FRONT PAGE APPLICATION VIN=12V 80 0.10 2.0 TYPICAL 0.05 60 1.5 TION (%) 0.00 Y CURRENT (µA) 40 1.0 MINIMUM LOAD CURRENT (A) –0.05 SUPPL LOAD REGULA 20 0.5 –0.10 VIN=12V FRONT PAGE APPLICATION REFERENCED TO VOUT AT 100mA LOAD 0 0.0 –0.15 –50 –10 30 70 110 150 0 12 24 36 48 60 0 200 400 600 800 1000 TEMPERATURE (°C) VIN (V) LOAD CURRENT (mA) 8494 G04 8494 G05 8495 G18 Transient Load Response, LoadSwitching Waveforms,Switching Waveforms, FullCurrent is Stepped from 20mABurst Mode OperationFrequency Continuous Operation(Burst Mode Operation) to 220mA VSW VSW 10V/DIV 10V/DIV VOUT I 100mV/DIV L IL 0.5A/DIV 0.5A/DIV VOUT VOUT 5mV/DIV IL 5mV/DIV 0.5A/DIV 10µs/DIV 1µs/DIV 500µs/DIV FRONT PAGE APPLICATION FRONT PAGE APPLICATION FRONT PAGE APPLICATION V 8494 G16 8494 G18 8494 G17 IN = 12V VIN = 12V VIN = 12V VOUT = 5V VOUT = 5V VOUT = 5V ILOAD = 20mA ILOAD = 0.5A 8494fa 4 For more information www.linear.com/LT8494 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Related Parts
