MIC5355/6 Dual 500mA Cap Low Dropout, Micropower Linear Regulator General Description Features The MIC5355/6 is an advanced dual, micropower, low 2.5V to 5.5V input voltage range dropout linear regulator. The MIC5355/6 provides low 2% initial output accuracy quiescent current operation, using only 70 A with both Wide output voltage range: 1.0V to 3.3V outputs enabled making it ideal for battery-powered Low quiescent current: 38A per output systems. In shutdown, the quiescent current drops to less than 1A. The MIC5355/6 provides two independently- Very low quiescent current in shutdown: <1 A typical controlled high-performance 500mA LDOs with typical Cap stable with 2.2F ceramic capacitor dropout voltage of 350mV at rated load. In addition, the Low dropout voltage: 350mV at 500mA MIC5355/6 is optimized to provide fast load and line Excellent load/line transient response transient performance with low-ESR ceramic output Independent logic controlled enable pins capacitors, requiring a minimum of only 2.2F. Output discharge circuit: MIC5356 The MIC5356 also incorporates an active discharge feature when the part is disabled that switches in a 30 Current and thermal limit protection load to pull down the output of the regulator. The Power 8-pin ePad MSOP package or 8-pin ePad 3mm MIC5355/6 is available in fixed output voltages in a x 3mm MLF package thermally-enhanced 8-pin ePad MSOP package or 8-pin ePad 3mm x 3mm MLF package. Applications Data sheets and support documentation can be found on Micrels web site at www.micrel.com. Smart phones GPS, PMP, DSC Notebooks and desktops Digital TV Portable electronics Typical Application MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC5355/6 Ordering Information Junction Manufacturer Ordering (1) Marking (2) Part Number Voltage Temperature Package Part Number Code Range MIC5355-SGYMME MIC5355-3.3/1.8YMME 55SG 3.3V/1.8V 40 to +125C 8-Pin ePad MSOP MIC5355-S4YMME MIC5355-3.3/1.2YMME 55S4 3.3V/1.2V 40 to +125C 8-Pin ePad MSOP MIC5355-SCYMME MIC5355-3.3/1.0YMME 55SC 3.3V/1.0V 40 to +125C 8-Pin ePad MSOP MIC5355-G4YMME MIC5355-1.8/1.2YMME 55G4 1.8V/1.2V 40 to +125C 8-Pin ePad MSOP MIC5355-JGYMME MIC5355-2.5/1.8YMME 55JG 2.5V1.8V 40 to +125C 8-Pin ePad MSOP MIC5356-SGYMME MIC5356-3.3/1.8YMME 56SG 3.3V/1.8V 40 to +125C 8-Pin ePad MSOP MIC5356-S4YMME MIC5356-3.3/1.2YMME 56S4 3.3V/1.2V 40 to +125C 8-Pin ePad MSOP MIC5356-SCYMME MIC5356-3.3/1.0YMME 56SC 3.3V/1.0V 40 to +125C 8-Pin ePad MSOP MIC5356-G4YMME MIC5356-1.8/1.2YMME 56G4 1.8V/1.2V 40 to +125C 8-Pin ePad MSOP MIC5356-JGYMME MIC5356-2.5/1.8YMME 56JG 2.5V/1.8V 40 to +125C 8-Pin ePad MSOP MIC5356-MMYML MI5356-2.8/2.8YML M3M 2.8V/2.8V 40 to +125C 8-Pin ePad 3mm x 3mm MLF MIC5356-MGYML MI5356-2.8/1.8YML M3G 2.8V/1.8V 40 to +125C 8-Pin ePad 3mm x 3mm MLF Notes: 1. MIC5356 offers Auto-Discharge function. 2. Other voltage available. Contact Micrel for detail. Pin Configuration 8-Pin ePad 3mm x 3mm MLF (ML) 8-Pin ePad MSOP (MME) Pin Description Pin Number Pin Name Pin Function 1 VIN Supply Input. 2 GND Ground. 3 NC Not internally connected. 4 EN2 Enable Input LDO2. Active High Input. Logic High = On Logic Low = Off Do not leave floating. 5 EN1 Enable Input LDO1. Active High Input. Logic High = On Logic Low = Off Do not leave floating. 6 NC Not internally connected. 7 VOUT2 LDO2 Output. 8 VOUT1 LDO1 Output. ePad HSPAD Heatsink pad. Connect to ground. M9999-031512-A March 2012 2