MIC5238 Ultra-Low Quiescent Current, 150mA Cap LDO Regulator General Description Features The MIC5238 is an ultra-low voltage output, 150mA LDO Ultra-low input voltage range:1.5V to 6V regulator. Designed to operate in a single supply or dual Ultra-low output voltage:1.0V minimum output voltage supply mode, the MIC5238 consumes only 23A of bias Low dropout voltage: 310mV at 150mA current, improving efficiency. When operating in the dual High output accuracy: 2.0% over temperature supply mode, the efficiency greatly improves as the higher voltage supply is only required to supply the 23A bias Cap: stable with ceramic or tantalum capacitors current while the output and base drive comes off of the Excellent line and load regulation specifications much lower input supply voltage. Zero shutdown current As a Cap regulator, the MIC5238 operates with a 2.2F Reverse leakage protection ceramic capacitor on the output, offering a smaller overall Thermal shutdown and current limit protection solution. It also incorporates a logic-level enable pin that IttyBitty SOT-23-5 package allows the MIC5238 to be put into a zero off-current mode when disabled. The MIC5238 is fully protected with current limit and Applications thermal shutdown. It is offered in the IttyBitty SOT-23-5 PDAs and pocket PCs package with an operating junction temperature range of 40C to +125C. Cellular phones Data sheets and support documentation can be found on Battery powered systems Micrels web site at: www.micrel.com. Low power microprocessor power supplies Typical Application Ultra-Low Voltage 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. MIC5238 Ordering Information Part Number Voltage** Junction Package Temp. Range Standard Marking Code Pb-Free Marking Code* MIC5238-1.0BM5 L410 MIC5238-1.0YM5 L410 1.0V 40 to +125C SOT-23-5 MIC5238-1.1BM5 L411 MIC5238-1.1YM5 L411 1.1V 40 to +125C SOT-23-5 MIC5238-1.3BM5 L413 MIC5238-1.3YM5 L413 1.3V 40 to +125C SOT-23-5 MIC5238-1.0BD5 N410 MIC5238-1.0YD5 N410 1.0V 40 to +125C TSOT-23-5 MIC5238-1.1BD5 N411 MIC5238-1.1YD5 N411 1.1V 40 to +125C TSOT-23-5 MIC5238-1.3BD5 N413 MIC5238-1.3YD5 N413 1.3V 40 to +125C TSOT-23-5 Notes: * Under bar symbol ( ) may not be to scale. ** Other voltage options available. Contact Micrel Marketing for details. Pin Configuration 5-Pin SOT-23 (M5) 5-Pin Thin SOT-23 (D5) Pin Description Pin Number Pin Name Pin Function 1 IN Supply Input 2 GND Ground 3 EN Enable (Input): Logic Low = shutdown Logic High = enable. Don not leave open. 4 BIAS Bias Supply Input 5 OUT Regulator Output M9999-111209 November 2008 2