TPS650250-Q1

TPS650250-Q1 www.ti.com SLVSAA7 – MARCH 2010 POWER MANAGEMENT IC FOR LI-ION POWERED SYSTEMS Check for Samples: TPS650250-Q1 FEATURES 1 Qualified for Automotive Applications 1.6A, 97% Efficient Step-Down Converter for System Voltage (VDCDC1) – 3.3V or 2.8V or Adjustable 0.8A, up to 95% Efficient Step-Down Converter for Memory Voltage (VDCDC2) – 1.8V or 2.5V or Adjustable 0.8A, 90% Efficient Step-Down Converter for Processor Core (VDCDC3) Adjustable Output Voltage on VDCDC3 30mA LDO for Vdd_alive 2 × 200mA General Purpose LDOs (LDO1 and LDO2) Dynamic Voltage Management for Processor Core LDO1 and LDO2 Voltage Externally Adjustable Separate Enable Pins for Inductive Converters 2.25MHz Switching Frequency 85mA Quiescent Current Thermal Shutdown Protection DESCRIPTION The TPS650250 is an integrated Power Management IC for applications powered by one Li-Ion or Li-Polymer cell, which require multiple power rails. The TPS650250 provides three highly efficient, step-down converters targeted at providing the core voltage, peripheral, I/O and memory rails in a processor based system. All three step-down converters enter a low power mode at light load for maximum efficiency across the widest possible range of load currents. The converters can be forced into fixed frequency PWM mode by pulling the MODE pin high. The TPS650250 also integrates two general purpose 200mA LDO voltage regulators, which are enabled with an external input pin. Each LDO operates with...