MIC5271 CCap Negatiive Low-Drropout Reggulator Genneral Desccription Featuures The MIC5271 is a Cap 100mA negativee regulator in a Stabble with cerammic or tantalum capacitor SOT--23-5 packagge. With betteer than 2% initial accuraccy, Positive and negative enable tthresholds this rregulator provvides a very accurate suppply voltage ffor Loww dropout voltaage: 500mVV 100mA applications that require a nnegative rail. The MIC5271 Loww ground curreent: 25A load = 1000A sinkss 100mA of output current at very low ddropout voltage (600mmV maximumm at 100mA off output curreent). Tighht initial accurracy: 2% Tighht load and linne regulation The Cap regulattor design is optimized to work with low- valuee, low-cost cceramic capaacitors. The ooutput typicaally Thermal shutdowwn and currennt-limit protecttion requiires only a 1F capacitancce for stability. IttyBBitty 5-pin SOOT-23 packaging Zeroo-current off mmode Desiggned for appplications whhere small ppackaging and efficieency are critiical, the MIC55271 combines LDO design Appllications expeertise with IttyBitty packagging to improvve performance and rreduce powerr dissipation. Ground curreent is optimized GaAAsFET bias to heelp improve bbattery life inn portable appplications. The Porttable camerass and video reecorders MIC55271 also inncludes a TTTL-compatible enable pin, PDAAs allowwing the userr to put the part into a zzero-current off Batttery-powered equipment modee. Postt-regulation oof DC-to-DC cconverters The MIC5271 is aavailable in the 5-pin SOT--23 package ffor space saving appplications annd it is avaailable with an adjusstable output. Datasheets and ssupport docuumentation arre available on Micreels web site aat: www.micreel.com. Typpical Application Regulator wiith Adjustablee Negative Voltage Output IttyBitty is a registereed trademark of MMicrel, Inc. Micrel Inc. 2180 Fortune Drivve San Jose, CCA 95131 USA tel +1 (408) 9444-0800 fax + 11 (408) 474-10000 Micrel, Inc. MIC5271 Ordering Information (1) (2) Part Number Marking Voltage Junction Temperature Range Package MIC5271YM5 L9AA Adjustable 40C to +125C SOT-23-5 MIC5271-3.0YM5 L930 3.0V 40C to +125C SOT-23-5 MIC5271-5.0YM5 L950 5.0V 40C to +125C SOT-23-5 Note: 1. Other voltages are available. Contact Micrel for details. 2. Underbar ( ) symbol may not be to scale. Pin Configurations MIC5271YM5 MIC5271-3.0YM5 MIC5271-5.0YM5 Adjustable Output Voltage Fixed Output Voltage Fixed Output Voltage (Top View) (Top View) (Top View) Pin Description MIC5271YM5 MIC5271-3.0YM5 MIC5271-5.0YM5 Pin Number Pin Function Pin Name Pin Name Pin Name Enable Input. TTL logic-compatible enable input. Logic 1 EN EN EN HIGH = ON, Logic LOW or open = OFF. 2 GND GND GND Ground Adjustable (Input): Adjustable feedback output ADJ connects to resistor voltage divider. 3 NC NC No Connect. Leave unconnected. 4 OUT OUT OUT Negative Regulator Output. 5 IN IN IN Negative Supply Input. April 6, 2015 040615-2.0 (while in progress) 2 Revision 2.0 (final document)