MIC5231-3.3YM5-TR Microchip

MIC5231 Micropower Cap LDO Regulator General Description Features The MIC5231 Cap low dropout voltage regulator is Extremely low quiescent currentonly 0.65A intended for low output current biasing applications. It No output capacitor requirement features extremely low ground current, not greater than Stable with ceramic or tantalum capacitors 4A under all load and temperature conditions, making it IttyBitty SOT-23-5 surface-mount package efficient and ideal for keep-alive applications in devices such as notebook computers. 10mA output drive The MIC5231 offers better than 2% initial accuracy and Low 150mV at 10mA dropout voltage low dropout (typically 150mV at 10mA output current). An Tight load and line regulation output capacitor is not required for stable operation, Low temperature coefficient decreasing cost and board space. Tiny ceramic chip Logic-level enable input capacitors may be used to improve transient response. The MIC5231 also features a control pin which allows the regulator to be shut down when not required. Its shutdown- Applications state draws zero current, benefiting battery-powered appli- Real-time clocks cations. SRAM backup The MIC5231 is available in fixed output voltages of 2.75V, Cellular telephones 3.0V, 3.3V and 5V in the small SOT-23-5 IttyBitty package. Contact Micrel for other voltage options. Laptop, notebook and palmtop computers Battery-powered equipment Data sheets and support documentation can be found on Micrels web site at: www.micrel.com. Bar code scanners SMPS post-regulator and DC-to-DC modules Typical Application MIC5231-5.0YM5 V IN V OUT IN OUT 6V 5V EN GND 5V Linear Regulator Application IttyBitty 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. MIC5231 (1) Ordering Information Lead Part Number Marking Voltage Temperature Range Package Finish MIC5231-2.75BM5 LM2H 2.75V 40C to +125C 5-Pin SOT-23 Standard (2) (3) MIC5231-2.75YM5 LM2H 2.75V 40C to +125C 5-Pin SOT-23 Pb-Free MIC5231-3.0BM5 LM30 3.0V 40C to +125C 5-Pin SOT-23 Standard (2) (3) MIC5231-3.0YM5 LM30 3.0V 40C to +125C 5-Pin SOT-23 Pb-Free MIC5231-3.3BM5 LM33 3.3V 40C to +125C 5-Pin SOT-23 Standard (2) (3) MIC5231-3.3YM5 LM33 3.3V 40C to +125C 5-Pin SOT-23 Pb-Free MIC5231-5.0BM5 LM50 5.0V 40C to +125C 5-Pin SOT-23 Standard (2) (3) MIC5231-5.0YM5 LM50 5.0V 40C to +125C 5-Pin SOT-23 Pb-Free Notes: 1. Other voltages available. Contact factory for details. 2. Under bar ( ) symbol used to identify Pb-Free device may not be to scale. 3. SOT-23-5 is a RoHS-compliant package. Lead finish is a NiPdAu. Mold compound is Halogen free. Pin Configuration MIC5231-5.0BM5 (M5) MIC5231-5.0YM5 (M5) Pin Description Pin Number Pin Name Pin Function 1 EN Enable (Input): Active high. Logic high = enable logic low = shutdown. Do not float. 2 GND Ground. 3 IN Supply Input. 4 OUT Regulated Output. 5 NC Not internally connected. M9999-110408-B November 2008 2