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SC2308A Datasheet(PDF) 1 Page - Semtech Corporation |
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SC2308A Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 17 page  POWER MANAGEMENT 600kHz Step-Up Switching Regulator with 2.2A, 45V Switch Typical Application Circuit SC2308A Features Input Voltage Range: 2.6V to 20V Boost and SEPIC Topologies Up to 40V Output in Boost Topology Integrated 2.2A/45V Switch 600kHz Constant Switching Frequency Current-Mode Control Eases Compensation Cycle-by-Cycle Current-Limiting Internal Soft-Start Thermal Shutdown Protection Low Shutdown Current (<µA) 8-Pin SO Lead-Free Package Fully WEEE and RoHS Compliant Applications Telecommunication Equipment Point of Load DC-DC Converters Portable Devices Description The SC2308A is a 600kHz current-mode switching regulator with an integrated low-side 2.2A power transistor. The oper- ating supply voltage of the SC2308A ranges from that of a single Li-ion cell to various PC board power supplies. The internal switch is rated at 45V, making the device suitable for high voltage boost and SEPIC applications. The SC2308A shuts down to less than µA of supply current. The SC2308A uses peak current-mode PWM control for ease of loop compensation and excellent transient response. Cycle-by-cycle current limiting lowers power transistor dissipation. An internal soft-start timer prevents output overshoot and limits the input current during start-up. Thermal shutdown prevents the chip from overheating. Rev. 2.0 4.7µF C1 5V VIN VOUT GND EN IN SW FB ON OFF SS22 D1 C2 22µF R2 11.3k R1 100k 12V, 0.8A L 10µH COMP R3 200k C4 470pF SC2308A C3 22µF C 1: Murata GRM31CR61A475K C 2,C3: Murata GRM31CR61C226K L: Coilcraft DO3316P103 D 1: ON SS22 Figure 1. 5V to 12V Step-Up Converter E fficiency vs Load C urrent VOUT = 12V 20 30 40 50 60 70 80 90 100 0 200 400 600 800 Load Current (mA) V IN = 5V |
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Similar Description - SC2308A |
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