TPS62730 step down converter for low-power RF applications. Briefing presentation Presented by: Thomas Hoffman 1
Why was the part developed? 2
Market Situation Metering Mobility is an unbreakable trend mostly driven by convenience and hunger for information Mobile devices allow for simple patient monitoring while increasing life quality Smart Metering enables flexible control of power needs through simple consumer interaction Building technologies support a flexible adjustment to life style and yet support reduce overall power consumption Most of the latest DC-DC Converters reach efficiencies greater 90% and so other approaches are needed to reduce power consumption or extend application run time. Some applications are challenged to guarantee an operating life through one battery of up to 10 years Building Technologies BT Accessories Sports gear Portable Medical Smart Phone
Why was the part developed? Applications using low-power RF devices that run on a battery have been burning more energy than necessary. One approach to solve the problem: One approach to avoid additional energy loss is to connect the battery to the load without any additional voltage regulation, which adds cost and space. The load itself is still burning more energy than needed while operating directly from the battery. This is because the minimum supply voltage of these devices is already close to the level of a discharged battery every input voltage about that level is a waste. Not a solution to the problem. Need for a solution! 4
Real solution, with real power savings. 5
New supply concept for wireless Apps Wanted - keep ultra low Iq in sleep mode - Reduce current consumption during Transmission - Increase battery life time Historical Power Concept: System powered directly from battery Low power Controller (MSP430) Bypass Mode Buck Conversion to ~ 2V Low power Controller (MSP430) Low Power Wireless (CCXXXX) Low Power Wireless (CCXXXX) Sensors Sensors New Power Concept: Sleep mode: system directly powered from battery RF operation: DC/DC conversion reduces power consumption
TPS62730 (TPS_Radio) 100mA Low Noise DC/DC solution with Bypass Mode Selectable or Automatic Transition from DC/DC to bypass mode Up to 95% Efficiency, 25uA (typ.) Quiescent Current and 30nA (typ.) Shutdown Current Excellent low Output Voltage Ripple DCS-Control topology Package: 1mm x 1.5mm QFN and 0402 caps, 0603 inductor Extends application run time between 20% to 30% Support reduction of total power consumption from battery Makes this device ideal for RF applications Enables seamless transition into Power Save Mode and excellent AC line and transient load regulation Small external components and small IC package allow for solution size of <12mm 2 BLE (Bluetooth Low Energy) MSP430 and alike controller supply HVAC (Heating, Ventilating, and Air Conditioning) VIN RF4CE (ZigBee) 1.9V - 3.9V Metering Smoke Detectors C 2.2 IN µf ON BYP VIN TPS62730EVM-726 GND TPS62730 ON/BYP SW VOUT STAT L 2.2µ H C 2.2 OUT µf VOUT 2.1V
New! 100mA Low Noise DC/DC solution with Bypass Mode: TPS62730 (TPS_Radio) Extends application run time between 20% to 30% Support reduction of total power consumption from battery Makes this device ideal for RF applications Enables seamless transition into Power Save Mode and excellent AC line and transient load regulation Small external components and small IC package allow for solution size of <12mm 2 Selectable or Automatic Transition from DC/DC to bypass mode Up to 95% Efficiency, 25uA (typ.) Quiescent Current and 30nA (typ.) Shutdown Current Excellent low Output Voltage Ripple DCS-Control topology Package: 1mm x 1.5mm QFN and 0402 caps, 0603 inductor TPS62730EVM-726
Product overview TPS62730 is a high frequency synchronous step-down DC/DC converter optimized for ultra low-power wireless applications, such as TI s low power wireless sub 1-GHz and 2.4 GHz RF transceivers. The device reduces the current consumption drawn from the battery during TX and RX mode by high-efficient step-down voltage conversion. Applications include: Bluetooth low energy systems Metering Building technologies Mobile phones Consumer electronics Medical and human interface devices 9
Order of Target Customer Preferences 1. Power Saving Efficiency of up to 95% Active control through RF device enables 20-30% reduction of battery current 2. Performance Superior EMI and noise performance No compromise on RF transmission power 3. Size Solution size <12% allows for fitting it easily on the main PCB Max 1mm solution height
TPS62730: Power Savings 100mA Low Noise DC/DC solution with Bypass Mode TX Current Analysis CC430 / TPS62730 40.0E-3 35.0E-3 30.0E-3 25.0E-3 20.0E-3 15.0E-3 10.0E-3 5.0E-3 000.0E+0 ~11 10 0-6 ~11 10 0-6 ~11 10 0-6 dbm dbm dbm VCC: 3.0V VCC: 3.3V VCC: 3.6V CC430 & TPS62730 Bypass 37.8E-3 34.8E-3 17.9E-3 15.0E-3 37.8E-3 34.9E-3 17.9E-3 15.0E-3 37.9E-3 34.8E-3 18.0E-3 15.1E-3 CC430 & TPS62730 29.6E-3 27.3E-3 14.1E-3 11.8E-3 27.1E-3 25.2E-3 12.9E-3 10.8E-3 25.3E-3 23.3E-3 11.9E-3 10.0E-3 Battery current is significantly reduced by adding TPS62730 to the solution High capacity batteries are expensive; an additional regulator is quickly compensated through the power savings
TPS62730: Performance 100mA Low Noise DC/DC solution with Bypass Mode Superior EMI and noise performance DCS-Control topology allows Fast AC line and transient load response Smooth transition between PWM and Power Save Mode Low output voltage ripple
TPS62730: Solution Size 100mA Low Noise DC/DC solution with Bypass Mode TPS62730 L1 VINC 1 GND C2 VOUT Total area is less than 12mm² Proposed components size: CIN, COUT: 0402 (1x0.5mm 2 ) L = 2012 size (2x1.2mm 2 ) IC: 1x1.5mm size (1.5mm 2 ) Small solution footprint allows for fitting it easily on the main PCB 1mm max solution height
TPS62730 target applications Metering Gas, Water, Electricity Meter Heat cost allocator Consumer Interface Fitness & Healthcare: Wearable monitoring Sports gear Bluetooth Accessories: Headsets Consumer Audio TPS62730 is a voltage regulator perfect for power-constrained applications High efficiency and low noise allow the POL regulator to support Low Power RF and BLE devices to either run longer with a given battery or reduce costly battery capacity Building Management: Light, Heat and Safety mash networks Security & Surveillance Mobile phone Smart Phones Feature Phones
Implementation diagrams 15
TPS62730 and CC2540 Bluetooth low energy system-on-chip device 16
TPS62730 and CC430 low power MCU 17