SC283WLTRT Semtech

SC283 Dual Channel 2.5MHz, 1.8A Synchronous Step-Down Regulator POWER MANAGEMENT Description Features The SC283 is a dual channel 1.8A synchronous step- V Range: 2.9 5.5V IN down regulator designed to operate with an input V Selectable: 0.8 - 3.3V OUT voltage range of 2.9 to 5.5 Volts. Each channel offers Up to 1.8A Output Current for Each Channel fifteen pre-determined output voltages via four control Ultra-Small Footprint, <1mm Height Solution pins programmable from 0.8 to 3.3 Volts. The control pins 2.5MHz Switching Frequency allow for on-the-fly voltage changes, enabling system Efficiency Up to 93% designers to implement dynamic power savings. The Low Output Noise Across Load Range SC283 is also capable of adjusting the output voltage via an external resistor divider. Excellent Transient Response Start Up into Pre-Bias Output The device operates with a fixed 2.5MHz oscillator 100% Duty-Cycle Low Dropout Operation frequency, allowing the use of small surface mount <1A Shutdown Current external components. Internal Soft Start Input Under-Voltage Lockout Connecting CTL0 CTL3 to logic low forces the device Output Over-Voltage, Current Limit Protection into shutdown mode reducing the supply current to less than 1A. Connecting any of the control pins to logic Over-Temperature Protection high enables the converter and sets the output voltage Adjustable Output Voltage according to Table 1. Other features include under- 2mm x 3mm x 0.8mm thermally enhanced voltage lockout, soft-start to limit inrush current, and MLPQ-W18 package over-temperature protection. -40 to +85C Temperature Range Pb-Free product. RoHS/WEEE and Halogen Free com- The SC283 is available in a thermally-enhanced, 2mm pliant x 3mm x 0.8mm MLPQ-W18 package and has a rated temperature range of -40 to +85C. Applications Desktop Computing Set-Top Box LCD TV Network Cards Printer Typical Application Circuit 1 www.semtech.com July 20, 2010SC283 Pin Configuration Ordering Information Device Package (2)(3) SC283WLTRT 2mm x 3mm x 0.8mm MLPQ-W18 (4) SC283EVB Evaluation Board Notes: (1) 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. (2) Available in tape and reel only. A reel contains 3,000 devices. (3) Pb-Free product. RoHS/WEEE and Halogen Free compliant. (4) Please specify the default VOUTA & VOUTB when ordering. Table 1 Output Voltage Settings CTL3 CTL2 CTL1 CTL0 Output Voltage 0 0 0 0 Shutdown 0 0 0 1 0.80 2mm x 3mm x 0.8mm MLPQ-W18 (1) = 65C/W JA 0 0 1 0 1.00 0 0 1 1 1.025 Marking Information 0 1 0 0 1.05 0 1 0 1 1.20 0 1 1 0 1.25 0 1 1 1 1.30 1 0 0 0 1.50 1 0 0 1 1.80 1 0 1 0 2.20 1 0 1 1 2.50 1 1 0 0 2.60 1 1 0 1 2.80 Marking for 2mm x 3mm MLPQ-W 18 Lead Package: yw = Datecode (Reference Package Marking Design Guidelines, 1 1 1 0 3.00 Appendix A) 1 1 1 1 3.30 xxx = Semtech Lot number (Example: 901) 2010 Semtech Corp. www.semtech.com 2