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MIC2937A-3.3WU Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC2937A-3.3WU Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 12 page MIC2937A/29371/29372 Micrel, Inc. May 2006 1 MIC2937A/29371/29372 Features • High output voltage accuracy • Guaranteed 750mA output • Low quiescent current • Low dropout voltage • Extremely tight load and line regulation • Very low temperature coefficient • Current and thermal limiting • Input can withstand –20V reverse battery and +60V posi- tive transients • Error flag warns of output dropout • Logic-controlled electronic shutdown • Output programmable from 1.24V to 26V(MIC29372) • Available in TO-220, TO-263, TO-220-5, and TO-263-5 packages. Applications • Battery Powered Equipment • Cellular Telephones • Laptop, Notebook, and Palmtop Computers • PCMCIA V CC and VPP Regulation/Switching • Bar Code Scanners • Automotive Electronics • SMPS Post-Regulator/ DC to DC Modules • High Efficiency Linear Power Supplies Pin Configuration GROUND OUTPUT INPUT TO-220-5 Package (MIC29371/29372BT/WT) TO-220 Package (MIC2937A-xxBT/WT) General Description The MIC2937A family are “bulletproof” efficient voltage regu- lators with very low dropout voltage (typically 40mV at light loads and 300mV at 500mA), and very low quiescent current (160µA typical). The quiescent current of the MIC2937A in- creases only slightly in dropout, thus prolonging battery life. Key MIC2937A features include protection against reversed battery, fold-back current limiting, and automotive “load dump” protection (60V positive transient). The MIC2937 is available in several configurations. The MIC2937A-xx devices are three pin fixed voltage regulators with 3.3V, 5V, and 12V outputs available. The MIC29371 is a fixed regulator offering logic compatible ON/OFF switching input and an error flag output. This flag may also be used as a power-on reset signal. A logic-compatible shutdown input is provided on the adjustable MIC29372, which enables the regulator to be switched on and off. TO-263 Package (MIC2937A-xxBU/WU) GROUND OUTPUT INPUT TO-263-5 Package (MIC29371/29372BU/WU) Five Lead Package Pin Functions: MIC29371 MIC29372 1) Error Adjust 2) Input Shutdown 3) Ground Ground 4) Output Input 5) Shutdown Output The TAB is Ground on the TO-220 and TO-263 packages. MIC2937A/29371/29372 750mA Low-Dropout Voltage Regulator Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com 2 1 3 1 2 3 4 5 2 1 3 1 2 3 4 5 |
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