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SC4538 Datasheet(PDF) 3 Page - Semtech Corporation |
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SC4538 Datasheet(HTML) 3 Page - Semtech Corporation |
3 / 14 page 3 Exceeding the above specifications 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. NOTES: (1) Tested according to JEDEC standard JESD22-A114-B. (2) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards. Unless otherwise noted: V IN = 3.6V, C IN = 2.2μF, C OUT = 1μF, C COMP = 47nF, R COMP = 1.27kΩ, R ISET = 5.76kΩ, T A = -40 to 85ºC, typical values are at T A = 25ºC. Electrical Characteristics Absolute Maximum Ratings Supply Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +20.0 LX Voltage, Output Voltage (V) . . . . . . . . . . . . . -0.3 to +45 Current Sink Voltage (V) . . . . . . . . . . . . . . . . . . . . -0.3 to +45 Enable Voltage (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V IN + 0.3) Compensation Voltage (V) . . . . . . . . . . . . . . . . . . -0.3 to +2.0 Current Set Voltage (V) . . . . . . . . . . . . . . . . . . . . . . -0.3 to +2.0 ESD Protection Level(1) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Recommended Operating Conditions Ambient Temperature Range (°C) . . . . . . . . . . . . . -40 to +85 Supply Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.8 to 5.5 Output Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 to 40 Thermal Information Thermal Resistance, Junction to Ambient(2) (°C/W) . . . . . 74 Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +150 Storage Temperature Range (°C) . . . . . . . . . . . . -65 to +150 Peak IR Reflow Temperature (10s to 30s) (°C) . . . . . . . +260 SC4538 Parameter Symbol Conditions Min Typ Max Units Supply Input Voltage V IN 2.8 5.5 V UVLO Threshold V UVLO V IN rising 2.40 2.60 2.79 V UVLO Hysteresis V UVLO-HYS 120 mV Quiescent Supply Current I Q Not switching 1.8 mA Shutdown Supply Current I SHDN EN tied to GND 0.1 1 μA EN Logic High Voltage V IN 1.80 V EN Logic Low Voltage V IL 0.8 V EN Logic Input Current I IL, I IH V IN = 5.5V, V EN = 0V or 5.5V ±0.01 ±1 μA Thermal Shutdown Temperature T SD T J rising 155 °C Thermal Shutdown Hysteresis 20 °C Boost Converter Characteristics Switching Frequency f SW 680 800 920 kHz Maximum Duty Cycle D MAX V IN = 3.2V, T A = 25°C 92 % Minimum On-Time t ON(MIN) 100 ns |
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