MIC29371-3.3WU Microchip

MIC2937A/29371/29372 Micrel, Inc. MIC2937A/29371/29372 750mA Low-Dropout Voltage Regulator General Description Features High output voltage accuracy The MIC2937A family are bulletproof efcient voltage regu- Guaranteed 750mA output lators with very low dropout voltage (typically 40mV at light Low quiescent current loads and 300mV at 500mA), and very low quiescent current Low dropout voltage (160A typical). The quiescent current of the MIC2937A in- Extremely tight load and line regulation creases only slightly in dropout, thus prolonging battery life. Very low temperature coefcient Key MIC2937A features include protection against reversed Current and thermal limiting battery, fold-back current limiting, and automotive load dump Input can withstand 20V reverse battery and +60V posi- protection (60V positive transient). tive transients The MIC2937 is available in several congurations. The Error ag warns of output dropout MIC2937A-xx devices are three pin xed voltage regulators Logic-controlled electronic shutdown with 3.3V, 5V, and 12V outputs available. The MIC29371 is Output programmable from 1.24V to 26V(MIC29372) a xed regulator offering logic compatible ON/OFF switching Available in TO-220, TO-263, TO-220-5, and TO-263-5 input and an error ag output. This ag may also be used as packages. a power-on reset signal. A logic-compatible shutdown input Applications is provided on the adjustable MIC29372, which enables the Battery Powered Equipment regulator to be switched on and off. Cellular Telephones Laptop, Notebook, and Palmtop Computers PCMCIA V and V Regulation/Switching CC PP Bar Code Scanners Automotive Electronics SMPS Post-Regulator/ DC to DC Modules High Efciency Linear Power Supplies Pin Conguration 1 2 3 4 5 1 2 3 INPUT GROUND OUTPUT TO-263-5 Package TO-263 Package (MIC2937A-xxBU/WU) (MIC29371/29372BU/WU) Five Lead Package Pin Functions: MIC29371 MIC29372 1 2 3 1 2 3 4 5 1) Error Adjust INPUT GROUND OUTPUT 2) Input Shutdown 3) Ground Ground TO-220 Package TO-220-5 Package 4) Output Input (MIC2937A-xxBT/WT) (MIC29371/29372BT/WT) 5) Shutdown Output The TAB is Ground on the TO-220 and TO-263 packages. Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 MIC2937A/29371/29372 Micrel, Inc. Ordering Information Part Number Voltage Junction Temp. Range Package Standard RoHS Compliant* MIC2937A-3.3BU MIC2937A-3.3WU 3.3V 40C to +125C TO-263-3 MIC2937A-3.3BT MIC2937A-3.3WT 3.3V 40C to +125C TO-220-3 MIC2937A-5.0BU MIC2937A-5.0WU 5.0V 40C to +125C TO-263-3 MIC2937A-5.0BT MIC2937A-5.0WT 5.0V 40C to +125C TO-220-3 MIC2937A-12BU MIC2937A-12WU 12V 40C to +125C TO-263-3 MIC2937A-12BT MIC2937A-12WT 12V 40C to +125C TO-220-3 MIC29371-3.3BU MIC29371-3.3WU 3.3V 40C to +125C TO-263-5 MIC29371-3.3BT MIC29371-3.3WT 3.3V 40C to +125C TO-220-5 MIC29371-5.0BU MIC29371-5.0WU 5.0V 40C to +125C TO-263-5 MIC29371-5.0BT MIC29371-5.0WT 5.0V 40C to +125C TO-220-5 MIC29371-12BU MIC29371-12WU 12V 40C to +125C TO-263-5 MIC29371-12BT MIC29371-12WT 12V 40C to +125C TO-220-5 MIC29372BU MIC29372WU ADJ 40C to +125C TO-263-5 MIC29372BT MIC29372WT ADJ 40C to +125C TO-220-5 * RoHS compliant with high-melting solder exemption. MIC2937A/29371/29372 2 May 2006