LTM8050 ELECTRICALCHARACTERISTICS The l denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25°C. VIN = 12V, RUN/SS = 12V, BIAS = 3V unless otherwise noted. (Note 2) PARAMETERCONDITIONSMINTYPMAXUNITS Minimum Input Voltage l 3.6 V Output DC Voltage 0 < IOUT ≤ 2A; RFB Open 0.8 V 0 < IOUT ≤ 2A; RFB = 16.9k; VIN = 32V 24 V Output DC Current 0 2 A Quiescent Current into VIN RUN/SS = 0V 0.01 1 µA Not Switching 35 60 µA BIAS = 0V, Not Switching 120 160 µA Quiescent Current into BIAS RUN/SS = 0V 0.01 0.5 µA Not Switching 82 120 µA BIAS = 0V, Not Switching 1 5 µA Line Regulation 5.5V < VIN < 58V, IOUT = 1A 0.3 % Load Regulation 0A < IOUT < 2A 0.3 % Output Voltage Ripple (RMS) 0A < IOUT < 2A 10 mV Switching Frequency RT = 45.3k 750 kHz Voltage (at FB Pin) 775 790 805 mV l 770 810 mV Internal Feedback Resistor 499 kΩ Minimum BIAS Voltage for Proper Operation 2.8 V RUN/SS Pin Current RUN/SS = 2.5V 6 10 µA RUN Input High Voltage 2.5 V RUN Input Low Voltage 0.2 V PGOOD Threshold (at FB Pin) VOUT Rising 730 mV PGOOD Leakage Current PGOOD = 30V 0.1 1 µA PGOOD Sink Current PGOOD = 0.4V 200 600 µA SYNC Input Low Threshold fSYNC = 550kHz 0.5 V SYNC Input High Threshold fSYNC = 550kHz 0.7 V SYNC Bias Current SYNC = 0V 0.1 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings LTM8050I is guaranteed to meet specifications over the full –40°C may cause permanent damage to the device. Exposure to any Absolute to 125°C internal operating temperature range. The LTM8050MP is Maximum Rating condition for extended periods may affect device guaranteed to meet specifications over the full –55°C to 125°C internal reliability and lifetime. operating temperature range. Note that the maximum internal temperature Note 2: The LTM8050E is guaranteed to meet performance specifications is determined by specific operating conditions in conjunction with board from 0°C to 125°C internal. Specifications over the full –40°C to layout, the rated package thermal resistance and other environmental 125°C internal operating temperature range are assured by design, factors. characterization and correlation with statistical process controls. The Note 3: Unless otherwise noted, the absolute minimum voltage is zero. 8050fc For more information www.linear.com/LTM8050 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Package Photo Related Parts Design Resources
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