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SC4503 Datasheet(PDF) 2 Page - Semtech Corporation |
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SC4503 Datasheet(HTML) 2 Page - Semtech Corporation |
2 / 22 page 2 2007 Semtech Corp. www.semtech.com POWER MANAGEMENT SC4503 Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not recommended. *Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad as per JESD51 standards. Electrical Characteristics Absolute Maximum Ratings Unless specified: V IN = VSHDN/SS = 3V, -40°C < TA = TJ < 85°C Parameter Symbol Maximum Units Supply Voltage V IN -0.3 to 20 V SW Voltage V SW -0.3 to 34 FB Voltages V FB -0.3 to V IN +0.3 SHDN/SS Voltage V SHDN -0.3 to V IN +1 Thermal Resistance Junction to Ambient (TSOT - 23) θ JA 191* °C/W Thermal Resistance Junction to Ambient (2X2 mm MLPD-W) θ JA 78* °C/W Maximum Junction Temperature T J 150 °C Storage Temperature Range T STG -65 to +150 Lead Temperature (Soldering)10 sec (TSOT - 23) T LEAD 260 Peak IR Reflow Temperature (2X2mm MLPD-W) T IR 260 ESD Rating (Human Body Model) ESD 2000 V Parameter Conditions Min Typ Max Units Under-Voltage Lockout Threshold 2.2 2.5 V Maximum Operating Voltage 20 Feedback Voltage 1.225 1.250 1.275 Feedback Line Voltage Regulation 2.5V < V IN < 20V 0.02 %/V FB Pin Bias Current -25 -50 nA Switching Frequency 1.15 1.30 1.55 MHz Minimum Duty Cycle 0 % Maximum Duty Cycle 86 90 Switch Current Limit 1.4 1.9 2.5 A Switch Saturation Voltage I SW = 1.4A 260 430 mV Switch Leakage Current V SW = 5V 0.01 1 µA V IN Quiescent Supply Current V SHDN/SS = 2V, VFB = 1.5V (not switching) 0.8 1.1 mA V IN Supply Current in Shutdown V SHDN/SS = 0 0.01 1 µA |
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