1 Features

1• 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 and 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: 300 ns

– TPS65023B: 100 ns

• 85-μA Quiescent Current

• Low Ripple PFM Mode

• Thermal Shutdown Protection

• 40-Pin, 5-mm × 5-mm WQFN Package

2 Applications

• Digital Media Players

• Internet Audio Players

• Digital Still Cameras

• Smart Phones

• Supply DaVinci™ DSP Family Solutions

3 Description

The TPS65023x device is an integrated power

management IC for applications powered by one

Li-Ion or Li-Polymer cell, which require multiple power

rails. The TPS65023x 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 through 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 TPS65023x 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 from 1.5 V to 6.5 V, thus

allowing them to be supplied from one of the stepdown

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 disabling or enabling and setting the

LDO output voltages. The interface is compatible with

both the fast and standard mode I2C specifications,

allowing transfers at up to 400 kHz. The TPS65023x

is available in a 40-pin WQFN package, and operates

over a free-air temperature of –40°C to 85°C.