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| EUP3458 ds3458 ver0.2 apr. 2011 1 1.2a,30v,1.2mhz step-down converter description the EUP3458 is current mode, step-down switching regulator capable of driving 1.2a continuous load w ith excellent line and load regulation. the EUP3458 can operate with an input voltage range from 4.5v to 30 v and the output can be externally set from 0.8v to 1 5v with a resistor divider. fault protection includes cycle-by-cycle current limiting and thermal shutdown. in shutdown mode the regulator draws 1a of supply current. internal soft-start minimizes the inrush current and the out put overshoot. the EUP3458 is available in sot23-6 and tsot23-6 packages. typical application circuit features 1.2a output current 0.3 internal dmos output switch 4.5v to 30v input operating range output adjustable from 0.8v to 15v up to 92% efficiency 1a shutdown current fixed 1.2mhz frequency thermal shutdown and overcurrent protection input supply undervoltage lockout available in sot23-6 and tsot23-6 packages rohs compliant and 100% lead(pb)-free halogen-free applications distributed power systems battery charger pre-regulator for linear regulators wled drivers figure 1. 12v/24v to 3.3v application circuit
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