TPS65023RSBR

1 FEATURES

• 1.7 A, 90% Efficient Step-Down Converter for Processor Core (VDCDC1)

• 1.2 A, Up to 95% Efficient Step-Down Converter for System Voltage (VDCDC2)

• 1.0 A, 92% Efficient Step-Down Converter for Memory Voltage (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

• I2C™ Setup and Hold Timing:

– TPS65023: 300ns

– TPS65023B: 100ns

• 85-μA Quiescent Current

• Low Ripple PFM Mode

• Thermal Shutdown Protection

• 40 Pin, 5 mm × 5 mm QFN Package

2 APPLICATIONS

• Digital Media Players

• Internet Audio Player

• Digital Still Camera

• Smart Phones

• Supply DaVinci™ DSP Family Solutions

3 DESCRIPTION

The TPS65023, TPS65023B is an integrated Power Management IC for applications powered by one Li-Ion or Li-Polymer cell, and which require multiple power rails. The TPS65023, TPS65023B provides three highly efficient, step-down converters targeted at providing the core voltage, peripheral, I/O and memory rails in a processor based system. The core converter allows for on-the-fly voltage changes via serial interface, allowing the system to implement dynamic power savings. 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 TPS65023, TPS65023B 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 TPS65023, TPS65023B is available in a 40-pin (RSB) QFN package, and operates over a free-air temperature of –40°C to 85°C.

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