RT6150A

® RT6150A/B Current Mode Buck-Boost Converter General Description The RT6150A/B is a high efficiency, fixed frequency, BuckBoost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous transfer function through all operating modes, making the product ideal for single lithium-ion, multi-cell alkaline or Ni-MH battery applications where the output voltage is within the battery voltage range. The device includes two N-MOSFET switches and two PMOSFET switches for high efficiency operation. Switching frequency is set at 1MHz to reduce the external component size. Quiescent current is only 60μA in Power Save Mode (PSM), maximizing battery life in portable applications. PSM operation is user controlled and can be enabled by driving the PS pin low. If the PS pin is driven high, then fixed frequency switching is enabled. Other features include low shutdown current, internal soft-start control, thermal shutdown protection and current limit. The RT6150A is available in the WDFN-10L 3x3 package and the RT6150B is available in the WDFN-10L 2.5x2.5 package. Applications  Portable Products  Handheld Instrumentation Features  Single Inductor  Fixed Frequency Operation with Battery Voltages  Synchronous Rectification : Up to 90% Efficiency  Up to 800mA Continuous Output Current  VOUT Disconnected from VIN during Shutdown  Power Save Mode (PSM) Enable Control  <1μA Shutdown Current  In...