EUP3489

EUP3489 5A,30V,500KHz Step-Down Converter DESCRIPTION The EUP3489 is current mode, step-down switching regulator capable of driving 5A continuous load with excellent line and load regulation. The EUP3489 operates with an input voltage range from 4.75V to 30V and the output voltage is externally set from 1.222V to 26V with a resistor divider. Fault condition protection includes cycle-by-cycle current limit and thermal shutdown. In shutdown mode the regulator draws 3µA of supply current. Internal soft-start minimizes the inrush supply current and the output overshoot at initial startup. The EUP3489 require a minimum number of external components. FEATURES 4.75V to 30V Wide Input Operating Range Output Adjustable from 1.222V to 26V Up to 5A Output Current 3µA Low Shutdown Current 0.1Ω Internal DMOS Output Switch Up to 90% Efficiency Fixed 500kHz Switching Frequency Internal Compensation Internal Soft Start Cycle-by-Cycle Current Limit Protection Thermal Shutdown Protection Input Supply Undervoltage Lockout Available SOP-8 (EP) Package RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free APPLICATIONS LCD TV Battery Charger DSL Modems Distributive Power Systems Pre-regulator for Linear Regulators Typical Application Circuit Figure 1. 5V Application Circuit DS3489 Ver0.1 Oct. 2013 1 ...