MIC5239 Low Quiescent Current 500mA Cap LDO Regulator General Description Features The MIC5239 is a low quiescent current, Cap low-dropout Ultra-low quiescent current (I = 23A I = 100A) Q O regulator. With a maximum operating input voltage of 30V Continuous 500mA output current and a quiescent current of 23A, it is ideal for supplying Wide input range: 2.3V to 30V keep-alive power in systems with high voltage batteries. Low dropout voltage: 350mV 500mA Capable of 500mA output, the MIC5239 has a dropout 1.0% initial output accuracy voltage of only 350mV. It can provide high output current Stable with ceramic or tantalum output capacitor for applications such as USB. Logic compatible enable input As a Cap LDO, the MIC5239 is stable with either a ceramic or a tantalum output capacitor. It only requires a Low output voltage error flag indicator 3.3F output capacitor for stability. Overcurrent protection The MIC5239 includes a logic compatible enable input and Thermal shutdown an undervoltage error flag indicator. Other features of the Reverse-leakage protection MIC5239 include thermal shutdown, current limit, overvolt- Reverse-battery protection age shutdown, reverse-leakage protection, and reverse- battery protection. High-power SOIC-8, MSOP-8 and SOT-223 packages Available in the thermally enhanced SOIC-8, MSOP-8 and Applications SOT-223, the MIC5239 comes in fixed 1.5V, 1.8V, 2.5V, USB power supply 3.0V, 3.3V and 5.0V, and adjustable voltages. For other output voltages, contact Micrel. Keep-alive supply in notebook and portable personal computers All support documentation can be found on Micrels web Logic supply from high voltage batteries site at: www.micrel.com. Automotive electronics Battery-powered systems Typical Application 40 35 I = 1mA OUT MIC5239 I = 100A 30 OUT V V IN OUT IN OUT 30V 3.0V/100A 25 I = 23A EN FLG GND 20 GND I = 10A OUT 15 10 4 914 19 24 29 Regulator with Low I and Low I O Q Ground Current vs. Input Voltage MLF and MicroLeadFrame is a registered trademark of Amkor Technologies Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel MIC5239 Ordering Information Part Number (1) Voltage Junction Temp. Range Package Standard Pb-Free MIC5239-1.5BM MIC5239-1.5YM 1.5V 40C to +125C 8-pin SOIC MIC5239-1.5BMM MIC5239-1.5YMM 1.5V 40C to +125C 8-pin MSOP MIC5239-1.5BS MIC5239-1.5YS 1.5V 40C to +125C SOT-223 MIC5239-1.8BM MIC5239-1.8YM 1.8V 40C to +125C 8-pin SOIC MIC5239-1.8BMM MIC5239-1.8YMM 1.8V 40C to +125C 8-pin MSOP MIC5239-1.8BS MIC5239-1.8YS 1.8V 40C to +125C SOT-223 MIC5239-2.5BM MIC5239-2.5YM 2.5V 40C to +125C 8-pin SOIC MIC5239-2.5BMM MIC5239-2.5YMM 2.5V 40C to +125C 8-pin MSOP MIC5239-2.5BS MIC5239-2.5YS 2.5V 40C to +125C SOT-223 MIC5239-3.0BM MIC5239-3.0YM 3.0V 40C to +125C 8-pin SOIC MIC5239-3.0BMM MIC5239-3.0YMM 3.0V 40C to +125C 8-pin MSOP MIC5239-3.0BS MIC5239-3.0YS 3.0V 40C to +125C SOT-223 MIC5239-3.3BM MIC5239-3.3YM 3.3V 40C to +125C 8-pin SOIC MIC5239-3.3BMM MIC5239-3.3YMM 3.3V 40C to +125C 8-pin MSOP MIC5239-3.3BS MIC5239-3.3YS 3.3V 40C to +125C SOT-223 MIC5239-5.0BM MIC5239-5.0YM 5.0V 40C to +125C 8-pin SOIC MIC5239-5.0BMM MIC5239-5.0YMM 5.0V 40C to +125C 8-pin MSOP MIC5239-5.0BS MIC5239-5.0YS 5.0V 40C to +125C SOT-223 MIC5239BM MIC5239YM ADJ 40C to +125C 8-pin SOIC MIC5239BMM MIC5239YMM ADJ 40C to +125C 8-pin MSOP Note: 1. Other Voltages available. Contact Micrel for details. M9999-121007 December 2007 2