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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current

LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current
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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current - 1

LTC3106 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6µA Quiescent Current Features Dual Input Buck-Boost with Integrated PowerPath™ Manager n Ultralow Start-Up Voltages: 850mV Start with No Backup Source, 300mV with a Backup Source n Compatible with Primary or Rechargeable Backup Batteries n Digitally Selectable V OUT and VSTORE n Maximum Power Point Control n Ultralow Quiescent Current: 1.6μA n Regulated Output with V or V IN STORE Above, Below or Equal to the Output n Optional Backup Battery Trickle Charger n Shelf Mode Disconnect Function to Preserve Battery Shelf Life n Burst Mode® Operation n Accurate RUN Pin Threshold n Power Good Output Voltage Indicator n Selectable Peak Current Limit: 90mA/650mA n Available in Thermally Enhanced 3mm × 4mm 16-Pin QFN and 20-Pin TSSOP Packages The LTC®3106 is a highly integrated, ultralow voltage buckboost DC/DC converter with automatic PowerPath management optimized for multisource, low power systems. At no load, the LTC3106 draws only 1.6µA while creating an output voltage up to 5V from either input source. If the primary power source is unavailable, the LTC3106 seamlessly switches to the backup power source. The LTC3106 is compatible with either rechargeable or primary cell batteries and can trickle charge a backup battery whenever there is an energy surplus available. Optional maximum power point control ensures power transfer is optimized between power source and load. The output voltage and backup voltage, VSTORE, are programmed digitally, reducing the required number of external components. Zero power Shelf Mode ensures that the backup battery will remain charged if left connected to the LTC3106 for an extended time. Additional features include an accurate turn-on voltage, a power good indicator for VOUT, a user selectable 100mA peak current limit setting for lower power applications, thermal shutdown as well as user selectable backup power and output voltages. Wireless Sensor Networks Home or Office Building Automation Energy Harvesting Remote Sensors L, LT, LTC, LTM, Linear Technology, the Linear logo, Eterna and Burst Mode are registered trademarks and PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7432695 and 6366066. Typical Application Efficiency vs Input Voltage Solar Cell Input with Primary Battery Backup SW1 VSTORE VCAP ENVSTR RUN

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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current - 2

LTC3106 Absolute Maximum Ratings FE PACKAGE 20-LEAD PLASTIC TSSOP UDC PACKAGE 20-LEAD (3mm × 4mm) PLASTIC QFN TJMAX = 125°C, θJA = 52°C/W, θJC = 7°C/W (Note 5) EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB TJMAX = 125°C, θJA = 48.6°C/W, θJC = 8.6°C/W (Note 5) EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB Order Information LEAD FREE FINISH PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container For more information on lead free...

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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current - 3

The l denotes the specifications which apply over the specified junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 1.5V, VOUT = 3.3V, VSTORE = 3.6V and VAUX in regulation unless otherwise noted. PARAMETER VIN Start-Up Voltage VIN Maximum Operating Voltage VIN Minimum Operating Voltage VIN Minimum No-Load Start-Up Power VIN Undervoltage Quiescent Current Shutdown Current – VIN CONDITIONS Start-Up from VIN, VOUT = VAUX = VSTORE = 0V, RUN = VIN VSTORE in Operating Voltage Limits, RUN > 0.613V, ENVSTR Pin > 0.8V (Minimum Voltage Is Load Dependent) Start-Up...

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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current - 4

The l denotes the specifications which apply over the specified junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 1.5V, VOUT = 3.3V, VSTORE = 3.6V and VAUX in regulation unless otherwise noted. PARAMETER P-Channel MOSFET AUXSW RDS(ON) P-Channel VSTORE Isolation MOSFET RDS(ON) Peak Current Limit (VOUT) VALLEY Current Limit Peak Current Limit (VSTORE Charging) PGOOD Threshold PGOOD Hysteresis PGOOD Voltage Low PGOOD Leakage Current VIH Digital Input High Logic Level VIL Digital Input Low Logic Level Digital Input Leakage Current ENVSTR Input Leakage Current...

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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current - 5

LTC3106 Typical Performance Characteristics 1k VIN Power Loss vs Load Current Light Load Power Loss vs Input Voltage (VIN) VOUT = 1.8V AT 10µA VOUT = 5V AT 10µA VOUT = 1.8V AT 2µA VOUT = 5V AT 2µA VIN Power Loss vs Load Current VIN Efficiency vs Load Current VIN Efficiency vs Load Current VIN Power Loss vs Load Current VIN Efficiency vs Load Current VIN Power Loss vs Load Current VIN Efficiency vs Load Current TA = 25°C unless otherwise noted.

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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current - 6

LTC3106 Typical Performance Characteristics VSTORE/VCAP Efficiency vs Load Current 90 VSTORE/VCAP Power Loss vs Load Current 100 No Load Input Current vs Input Voltage 0.1 VSTORE/VCAP = 4.2V VSTORE/VCAP = 3.1V VSTORE/VCAP = 2V VSTORE/VCAP = 4.2V VSTORE/VCAP = 3.1V VSTORE/VCAP = 2V VSTORE/VCAP Power Loss vs Load Current VSTORE/VCAP Efficiency vs Load Current 0.1 VSTORE/VCAP = 4.2V VSTORE/VCAP = 3.1V VSTORE/VCAP = 2V VSTORE/VCAP Power Loss vs Load Current VSTORE/VCAP = 4.2V VSTORE/VCAP = 3.1V VSTORE/VCAP = 2V VSTORE/VCAP Efficiency vs Load Current 100 VSTORE/VCAP = 4.2V VSTORE/VCAP = 3.1V...

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LTC3106 - 300mA Low Voltage Buck-Boost Converter with PowerPath and 1.6μA Quiescent Current - 7

LTC3106 Typical Performance Characteristics Normalized VOUT, Accurate RUNTH vs Temperature PERCENT CHANGE (%) PERCENT CHANGE (%) Normalized Input Voltage UVLO vs Temperature 1.0 0.9 0.8 0.7 PERCENT CHANGE (%) Normalized RUN Threshold vs Temperature TA = 25°C unless otherwise noted. Start-Up Into Resistive Load L = 10µH 600 Maximum Output Current vs Input Voltage (VIN) Maximum Output Current vs Input Voltage (VSTORE/VCAP) 1k 10 VOUT = 1.8V VOUT = 2.2V VOUT = 3.3V VOUT = 5V Normalized VIN Start-Up Voltage vs Temperature 8 Maximum Output Current vs Input Voltage (VIN) VOUT = 1.8V VOUT = 2.2V...

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