MIC23060-G4YMT-TR

MIC23060-G4YMT-TR Features

• 2.7V to 5.5V supply voltage range
• Tiny 12-pin 2.5mm x 2.5mm Thin MLF® package
• Integrated sequencing– Dual Input LDO™ can turn-on prior to DC/DCconverter and automatically switch to post regulationfrom the DC/DC converter after it starts– Power for LDO from input during start-up– Adjustable delay time between outputs
• Zero-current off mode
• Current-limit and thermal shutdown protectionHyperLight Load™ DC/DC Converter
• Up to 600mA output current in PWM mode (sharedbetween switcher and linear LDO regulator outputs)
• 4MHz frequency in continuous PWM mode
• Tiny 2.2µH inductor, 4.7µF capacitor
• 85% Efficiency at 1mA output current
• >90% peak efficiency
• Low output voltage ripple across all loadsLDO Regulator
• Low Input voltage LDO regulator
• Stable with ceramic output capacitors
• Regulates from the output of the DC/DC converter
• 300mA output current capability
• High Accuracy: ±3% over temperature
• High PSRR: greater than 60dB
• Very low quiescent current: 16µA

MIC23060-G4YMT-TR General Description

The MIC23060 is a highly efficient power management ICintegrating a highfrequency DC/DC converter withHyperLight Load™ mode and a low input voltage capableLDO. The MIC23060 offers two output voltages at veryhigh efficiency on both outputs while maintaining a lowtotal system cost.The MIC23060 also provides sequencing of the twooutputs in every potential combination of turn-on and turn-off sequencing by connecting two pins either high or low,and using a single GPIO to enable and disable the device.The LDO is designed both to post regulate from the outputof the DC/DC converter for high system efficiency, and/orpower directly from the battery. For sequences where theLDO is enabled prior to the DC/DC output, the LDO is firstpowered by the input voltage (typically the battery source)and then after the DCDC soft start is complete, seamlesslytransition LDO input power to draw from the output of theDC/DC converter for higher efficiency operation throughpost-regulation.The DC/DC converter in the MIC23060 is a HyperLightLoad™ converter with very high efficiency at light load andat full operating current, maintaining high efficiency acrossall operating modes in portable electronics.The MIC23060 is a µCap design, operating with smallceramic output capacitors and tiny inductors for stability,reducing required board space and component cost and isavailable in the tiny 2.5mm x 2.5mm Thin MLF® package.Data sheets and support documentation can be found onMicrel’s web site at www.micrel.com.

MIC23060-G4YMT-TR Applications

• Mobile phones
• PDAs/pocket PCs
• Digital cameras/DSP power supply_______________________________________________________________________________________________________________________________________

MIC23060-G4YMT-TR Pin Description

Pin NumberPin NamePin Function123456789101112PGNDPower Ground.DVINAVINLDOSNSDLYS3S2S1DC/DC Supply Input Voltage.Small signal circuitry and Auxiliary LDO Supply Input Voltage.LDO Regulator Output.Main LDO input supply and feedback for DC-DC converter. Connect to DC/DC VOUT tosense output voltage.Delay. Capacitor to AGND sets a delay time between the first regulator reaching 90% ofits regulated voltage and enabling the second regulator. Also programs the turn-off delay,setting the time between the disable of each output. The on/off sequence of theregulators is set by pins S1, S2 and S3. Do not ground.SET Input (3). Active High Input. Logic High = On; Logic Low = Off; do not leave floating.See applications information for set pin configurations.SET Input (2). Active High Input. Logic High = On; Logic Low = Off; do not leave floating.See applications information for set pin configurations.SET Input (1). Active High Input. Logic High = On; Logic Low = Off; do not leave floating.See applications information for set pin configurations.AGNDAnalog Ground.SWNCSwitch (Output): Internal power MOSFET output switches.Not Internally connected.ePADePADNot internally connected, connect to ground plane to maximize heat dissipation.April 20102M9999-042210-B