Si9169

The Si9169 provides fully integrated synchronous buck or boost converter solution for the latest one cell Lithium Ion cellular phones. Capable of delivering up to 1 A of output current at +3.6 V, the Si9169 provides ample power for various baseband circuits as well as for some PAs. It combines the 2-MHz switching controller with fully integrated high-frequency MOSFETs to deliver the smallest and most efficient converter available today. The 2-MHz switching frequency reduces the inductor height to new level of 2 mm and minimizes the output capacitance requirement to less than 10 F with peak-to-peak output ripple as low as 10 mV. Combined with low-gate charge high-frequency MOSFETs, the Si9169 delivers efficiency up to 95%. The programmable pulse skipping mode maintains this high efficiency even during the standby and idle modes to increase overall battery life and talktime. In order to extract the last ounce of power from the battery, the Si9169 is designed with 100% duty cycle control for buck mode. With 100% duty cycle, the Si9169 operates like a saturated linear regulator to deliver the highest potential output voltage for longer talktime. Si9169 can be a drop-in replacement of Si9165 provided Pin 1 is not connected. For full 1A load condition, Pin 1 is required to be connected to low power controller ground.

The Si9169 is available in both standard and lead (Pb)-free TSSOP-20 pin package. In order to satisfy the stringent ambient temperature requirements, the Si9169 is rated to handle the industrial temperature range of −25 to 85 and −40to 85.