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.