MIC2950*/2951 150mA Low-Dropout Voltage Regulator General Description Features The MIC2950 and MIC2951 are bulletproof micropower High accuracy 3.3, 4.85, or 5V, guaranteed 150mA voltage regulators with very low dropout voltage (typically output 40mV at light loads and 250mV at 100mA), and very low Extremely low quiescent current quiescent current. Like their predecessors, the LP2950 and Low-dropout voltage LP2951, the quiescent current of the MIC2950/MIC2951 Extremely tight load and line regulation increases only slightly in dropout, thus pro-longing battery Very low temperature coefficient life. The MIC2950/MIC2951 are pin for pin compatible with Use as regulator or reference the LP2950/LP2951, but offer lower dropout, lower Needs only 1.5F for stability quiescent current, reverse battery, and automotive load dump protection. Current and thermal limiting Unregulated DC input can withstand 20V reverse The key additional features and protection offered include higher output current (150mA), positive transient protection battery and +60V positive transients for up to 60V (load dump), and the ability to survive an MIC2951 Version Only unregulated input voltage transient of 20V below ground Error flag warns of output dropout (reverse battery). Logic-controlled electronic shutdown The plastic DIP and SOIC versions offer additional system Output programmable from 1.24 to 29V functions such as programmable output voltage and logic controlled shutdown. The 3-pin TO-92 MIC2950 is pin- compatible with the older 5V regulators. Applications These system functions also include an error ag output Automotive electronics that warns of a low output voltage, which is often due to Voltage reference failing batteries on the input. This may also be used as a Avionics power-on reset. A logic-compatible shutdown input is also available which enables the regulator to be switched on and Cellular telephones off. This part may also be pin-strapped for a 5 V output, or Battery powered equipment programmed from 1.24 V to 29 V with the use of two SMPS post-regulator external resistors. High efficiency linear power supplies Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. Block Diagram * MIC2950 Discontinuance September 2007. MM8 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. MIC2950/2951 The MIC2950 is available as either an -05 or -06 version. The MIC2950 and MIC2951 have a tight initial tolerance The -05 and -06 versions are guaranteed for junction (0.5% typical), a very low output voltage temperature temperatures from 40C to +125C the -05 version has coefcient which allows use as a low-power voltage a tighter output and reference voltage specication reference, and extremely good load and line regulation range over temperature. The MIC2951 is available as an (0.04% typical). This greatly reduces the error in the -02 or -03 version. overall circuit, and is the result of careful design techniques and process control. Ordering Information Part Number Voltage Accuracy Junction Package Lead Finish Temperature Range MIC2950-05BZ* 5.0V 0.5% 40 to +125C 3-Pin TO-92 Standard MIC2950-06BZ* 5.0V 1.0% 40 to +125C 3-Pin TO-92 Standard MIC2951-02BM 5.0V 0.5% 40 to +125C 8-Pin SOIC Standard MIC2951-03BM 5.0V 1.0% 40 to +125C 8-Pin SOIC Standard MIC2951-02BN** 5.0V 0.5% 40 to +125C 8-Pin Plastic DIP Standard MIC2951-03BN 5.0V 1.0% 40 to +125C 8-Pin Plastic DIP Standard MIC2951-03BMM 5.0V 1.0% 40 to +125C 8-Pin MSOP Standard MIC2951-3.3BM 3.3V 1.0% 40 to +125C 8-Pin SOIC Standard MIC2950-05YZ*/*** 5.0V 0.5% 40 to +125C 3-Pin TO-92 Pb-Free MIC2950-06YZ*/*** 5.0V 1.0% 40 to +125C 3-Pin TO-92 Pb-Free MIC2951-02YM*** 5.0V 0.5% 40 to +125C 8-Pin SOIC Pb-Free MIC2951-03YM*** 5.0V 1.0% 40 to +125C 8-Pin SOIC Pb-Free MIC2951-03YN*** 5.0V 1.0% 40 to +125C 8-Pin Plastic DIP Pb-Free MIC2951-03YMM*** 5.0V 1.0% 40 to +125C 8-Pin MSOP Pb-Free MIC2951-3.3YM*** 3.3V 1.0% 40 to +125C 8-Pin SOIC Pb-Free Note: * TO-92 Package discontinuance notification issued September 2007. End-of-life-buy offer thru December 31, 2007. Contact factory for additional information. ** Contact factory for Pb-Free version. *** Pb-Free RoHS compliant with high-melting solder exemption. M9999-021610 February 2010 2