The TPS65021 is an integrated Power Management IC for applications powered by one Li-Ion or Li-Polymer cell, and which require multiple power rails. The TPS65021 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 TPS65021 also integrates two general-purpose 200 mA LDO voltage regulators, which are enabled with an external input pin. Each LDO operates with an input voltage range between 1.5 V and 6.5 V, allowing them to be supplied from one of the step-down converters or directly from the battery. The default output voltage of the LDOs can be digitally set to 4 different voltage combinations using the DEFLDO1 and DEFLDO2 pins. The serial interface can be used for dynamic voltage scaling, masking interrupts, or for dis/enabling and setting the LDO output voltages. The interface is compatible with the Fast/Standard mode I2C specification, allowing transfers at up to 400 kHz. The TPS65021 is available in a 40-pin (RHA) QFN package, and operates over a free-air temperature of –40°C to 85°C.

• 1.2 A, 97% Efficient Step-Down Converter for System Voltage (VDCDC1)
• 1 A, Up to 95% Efficient Step-Down Converter for Memory Voltage (VDCDC2)
• 900 mA, 90% Efficient Step-Down Converter for Processor Core (VDCDC3)
• 30 mA LDO/Switch for Real Time Clock (VRTC)
• 2 × 200 mA General-Purpose LDO
• Dynamic Voltage Management for Processor Core
• Preselectable LDO Voltage Using Two Digital Input Pins
• Externally Adjustable Reset Delay Time
• Battery Backup Functionality
• Separate Enable Pins for Inductive Converters
• I2C Compatible Serial Interface
• 85-µA Quiescent Current
• Low Ripple PFM Mode
• Thermal Shutdown Protection
• 40-Pin 6 mm × 6 mm QFN Package