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MIC5239-3.3BS Datasheet(PDF) 1 Page - Micrel Semiconductor |
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MIC5239-3.3BS Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 14 page MIC5239 Low Quiescent Current 500mA µCap LDO Regulator 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 • http://www.micrel.com December 2007 M9999-121007 General Description The MIC5239 is a low quiescent current, µCap low-dropout regulator. With a maximum operating input voltage of 30V and a quiescent current of 23µA, it is ideal for supplying keep-alive power in systems with high voltage batteries. Capable of 500mA output, the MIC5239 has a dropout voltage of only 350mV. It can provide high output current for applications such as USB. As a µCap LDO, the MIC5239 is stable with either a ceramic or a tantalum output capacitor. It only requires a 3.3µF output capacitor for stability. The MIC5239 includes a logic compatible enable input and an undervoltage error flag indicator. Other features of the MIC5239 include thermal shutdown, current limit, overvolt- age shutdown, reverse-leakage protection, and reverse- battery protection. Available in the thermally enhanced SOIC-8, MSOP-8 and SOT-223, the MIC5239 comes in fixed 1.5V, 1.8V, 2.5V, 3.0V, 3.3V and 5.0V, and adjustable voltages. For other output voltages, contact Micrel. All support documentation can be found on Micrel’s web site at: www.micrel.com. Features • Ultra-low quiescent current (IQ = 23µA @IO = 100µA) • Continuous 500mA output current • Wide input range: 2.3V to 30V • Low dropout voltage: 350mV @500mA • ±1.0% initial output accuracy • Stable with ceramic or tantalum output capacitor • Logic compatible enable input • Low output voltage error flag indicator • Overcurrent protection • Thermal shutdown • Reverse-leakage protection • Reverse-battery protection • High-power SOIC-8, MSOP-8 and SOT-223 packages Applications • USB power supply • Keep-alive supply in notebook and portable personal computers • Logic supply from high voltage batteries • Automotive electronics • Battery-powered systems ___________________________________________________________________________________________________________ Typical Application IGND = 23µA VOUT 3.0V/100µA VIN 30V IN MIC5239 EN OUT GND FLG Regulator with Low IO and Low IQ 40 35 30 25 20 15 10 914 19 24 29 4 IOUT = 1mA IOUT = 10µA IOUT = 100µA Ground Current vs. Input Voltage |
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