MIC35302 3A, Low Voltage Cap LDO Regulator General Description Features The MIC35302 is a 3A low-dropout linear voltage regulator 3A minimum guaranteed output current that provides a low voltage, high current output with a 600mV maximum dropout voltage over temperature minimum of external components. It offers high precision, Ideal for 3.0V to 2.5V conversion ultra-low dropout (600mV over temperature), and low Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion ground current. Stable with ceramic or tantalum capacitor The MIC35302 operates from an input of 2.25V to 6.0V. It Wide input voltage range is designed to drive digital circuits requiring low voltage at V : 2.25V to 6.0V IN high currents (i.e., PLDs, DSPs, micro-controllers, etc.), 1.0% initial output tolerance providing an adjustable output voltage from 1.24V to 5.4V. Excellent line and load regulation specications Features of the MIC35302 LDO include current limiting Logic controlled shutdown and thermal protection, and reverse current and reverse Thermal shutdown and current limit protection battery protection. Also logic (active-HIGH) enable pin is Reverse-leakage protection included. The MIC35302 is available in a 5-pin power 40 C to +125 C junction temperature D-Pak package (TO-252) with an operating temperature Power D-Pak package (TO-252) range of 40 C to +125 C. Data sheets and support documentation can be found on Applications Micrels web site at www.micrel.com. LDO linear regulator for low-voltage digital IC PC add-in cards High efficiency linear power supplies SMPS post regulator Battery charger Typical Application** Adjustable Regulator Application (*See Minimum Load Current Section) **See Thermal Design Section Super eta PNP is a registered trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC35302 Ordering Information Part Number Output Current Voltage Junction Temp. Range(1) Package MIC35302WD* 3A Adjustable 40 to +125C 5-Pin TO-252 Note: * RoHS compliant with high-melting solder exemption. Pin Configuration 5-Pin TO-252 D-Pak (D) Pin Description Pin Number Pin Name Pin Function 1 EN Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. 2 IN Input Voltage: Supplies the current to the output power device 3 GND, TAB Ground: TAB is also connected internally to the ICs ground on D-PAK. 4 OUT Regulator Output: The output voltage is set by the resistor divider connected from OUT to GND (with the divided connection tied to ADJ). A minimum value capacitor must be used to maintain stability. See Functional Description Information. 5 ADJ Adjustable Regulator Feedback Input: Connect to the resistor voltage divider that is placed from OUT to GND in order to set the output voltage. M9999-102309-A October 2009 2