Delivering MORE Together What is SuPA?

SuPA: Supply for Power Amplifier “SuPA” = DC/DC converter that provides an adaptive, optimized output power supply for the RF PA to extend battery life and improve thermal performance 2 Traditional Approach: Fixed Battery Supply to PA More Efficient Approach: TI SuPA Adaptive Supply to PA V BATT RF IN V CC RF OUT V CC RF OUT RF IN SuPA V BATT V CTRL V OUT V OUT is optimized for given P OUT

SuPA Benefit #1: Reduced Battery Current Draw RF PAs have efficiencies between 4-40%  TI SuPA solution can reduce battery current by 20%-50% –Longer battery life –Smaller battery form factor –More voice/usage time and coverage 3

SuPA Benefit #2: Thermal Dissipation Improvement TI SuPA solution reduces worst case hot temperature by up to 30ºC –Reduced thermal constraints –Higher reliability –Thinner, lighter phone design 4 With SuPAWithout SuPA 60.1˚C90.5˚C 30˙C Temperature Reduction + 33% Power Savings

SuPA Key Characteristics Differences vs Standard DC/DC Converter Higher Switching Frequencies Bypass Mode: ACB (Active Current Bypass) ACLR, EVM RF Compliance 5

Standard Buck vs. SuPA Buck Digital core Buck SuPA Buck No Vcon pin needed for changing output voltage Vcon pin critical for changing output voltage Typically operates at low duty cycles <25% to 60% Operates over wide duty cycles 10% to 100% High efficiency over entire output current range High efficiency over entire output voltage range Iq critical since it spends more time in standby Iq not that critical since PA is a constant load ~30mA to 50mA

Standard Buck vs. SuPA Buck (cont.) Digital core Buck SuPA Buck Current Limit designed to support max Iout Designed for Vcon transients and max Iout Transient response is optimized for Line/Load Transients Optimized for Vcon transients (output voltage) Start-up time not that critical as long as it’s below 700uS Critical, it must be less than 50uS Drop-out not critical and no need for a Bypass FET Designed to provide low output ripple and smooth transition

ti.com/rfpower SuPA: Supply for Power Amplifier Benefits –Reduced Battery Current Draw –Thermal Dissipation Improvement Different from a standard buck converter Summary