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SC283 Datasheet(PDF) 1 Page - Semtech Corporation |
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SC283 Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 20 page  POWER MANAGEMENT July 20, 2010 Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator SC283 Features V IN Range: 2.9 – 5.5V V OUT Selectable: 0.8 - 3.3V Up to 1.8A Output Current for Each Channel Ultra-Small Footprint, <1mm Height Solution 2.5MHz Switching Frequency Efficiency Up to 93% Low Output Noise Across Load Range Excellent Transient Response Start Up into Pre-Bias Output 100% Duty-Cycle Low Dropout Operation <1µA Shutdown Current Internal Soft Start Input Under-Voltage Lockout Output Over-Voltage, Current Limit Protection Over-Temperature Protection Adjustable Output Voltage 2mm x 3mm x 0.8mm thermally enhanced MLPQ-W18 package -40 to +85°C Temperature Range Pb-Free product. RoHS/WEEE and Halogen Free com- pliant Applications Desktop Computing Set-Top Box LCD TV Network Cards Printer Description The SC283 is a dual channel 1.8A synchronous step- down regulator designed to operate with an input voltage range of 2.9 to 5.5 Volts. Each channel offers fifteen pre-determined output voltages via four control pins programmable from 0.8 to 3.3 Volts. The control pins allow for on-the-fly voltage changes, enabling system designers to implement dynamic power savings. The SC283 is also capable of adjusting the output voltage via an external resistor divider. The device operates with a fixed 2.5MHz oscillator frequency, allowing the use of small surface mount external components. Connecting CTL0 — CTL3 to logic low forces the device into shutdown mode reducing the supply current to less than 1µA. Connecting any of the control pins to logic high enables the converter and sets the output voltage according to Table 1. Other features include under- voltage lockout, soft-start to limit inrush current, and over-temperature protection. The SC283 is available in a thermally-enhanced, 2mm x 3mm x 0.8mm MLPQ-W18 package and has a rated temperature range of -40 to +85°C. Typical Application Circuit www.semtech.com 1 |
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