Introduction
1
Introduction
The TPS6507x are a series of single-chip power management ICs for portable applications consisting of a
battery charger with Power Path management for a single lithium-ion (Li-Ion) or lithium-polymer
(Li-Polymer) cell. The charger can be supplied either by a USB port on the device USB pin or by a dc
voltage from a wall adapter connected to the device AC pin. Three highly-efficient, 2.25-MHz step-down
converters provide the core voltage, memory, and input/output (I/O) voltage in a processor-based system.
The step-down converters enter a low-power mode under light loads for maximum efficiency across the
widest possible range of load currents. In addition, there are two 200-mA low-dropout regulators (LDOs).
For low-noise applications, these devices can be forced into fixed-frequency PWM using the I
2
C
™
interface. The I
2
C interface allows the user to adjust various settings of the charger, the Power Path, the
dc-to-dc converters, and the LDOs. The step-down converters allow the use of small inductors and
capacitors in order to achieve a small total solution size.
1.1
Features
•
Battery charger with Power Path management
•
Up to 2.0-A output current on the Power Path
•
Three step-down converters
•
Two LDOs (200-mA output current)
•
wLED boost converter
•
Up to 25 mA per string with internal current sink
•
10-Bit analog-to-digital converter (ADC)/Touch screen interface
•
I
2
C-compatible interface
1.2
Applications
•
Portable navigation systems
•
PDAs, pocket PCs
•
OMAP
™
and low-power DSP supply
2
TPS6507xEVM
SLVU291B
–
April 2010
–
Revised September 2011
Copyright
©
2010
–
2011, Texas Instruments Incorporated