TPS65053 Datasheet, PDF (1/29 Pages) Texas Instruments – 5-CHANNEL POWER MGMT IC WITH TWO STEP DOWN CONVERTERS AND 3 LOW-INPUT VOLTAGE LDOs

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TPS65053
SLVS754 – MARCH 2007
5-CHANNEL POWER MGMT IC WITH TWO STEP DOWN CONVERTERS
AND 3 LOW-INPUT VOLTAGE LDOs
FEATURES
• Up To 95% Efficiency
• Output Current for DC/DC Converters:
– DCDC1 = 1 A; DCDC2 = 0.6 A
• DC/DC Converters Externally Adjustable
• V_IN Range for DC/DC Converters From 2.5 V to
6V
• 2.25-MHz Fixed Frequency Operation
• Power Save Mode at Light Load Current
• 180° Out-of-Phase Operation
• Output Voltage Accuracy in PWM mode ±1%
• Total Typical 32-µA Quiescent Current for
Both DC/DC Converters
• 100% Duty Cycle for Lowest Dropout
• One General-Purpose 400-mA LDO
• Two General-Purpose 200-mA LDOs
• V_IN Range for LDOs from 1.5 V to 6.5 V
• Available in a 4 mm x 4 mm 24-Pin QFN
Package
APPLICATIONS
• Cell Phones, Smart-Phones
• WLAN
• PDAs, Pocket PCs, GPS
• OMAP™ and Low-Power DSP Supply
• Portable Media Players
• Digital Cameras
DESCRIPTION
The TPS65053 is an integrated Power Management
IC for applications powered by one Li-Ion or
Li-Polymer cell, which require multiple power rails.
The TPS65053 provides two highly efficient,
2.25MHz step-down converters targeted at providing
the core voltage and I/O voltage in a processor
based system. Both step-down converters enter a
low power mode at light load for maximum efficiency
across the widest possible range of load currents.
For low noise applications the devices can be forced
into fixed frequency PWM mode by pulling the
MODE pin high. Both converters allow the use of
small inductors and capacitors to achieve a small
solution size. TPS65053 provides an output current
of up to 1A on the DCDC1 converter and up to 0.6A
on the DCDC2 converter. The TPS65053 also
integrates one 400mA LDO and two 200mA LDO
voltage regulators, which can be turned on/off using
separate enable pins on each LDO. Each LDO
operates with an input voltage range between 1.5V
and 6.5V allowing them to be supplied from one of
the step-down converters or directly from the main
battery. LDO1 and LDO2 are externally adjustable
while LDO3 has a fixed output voltage of 1.3V.
The TPS65053 comes in a small 24-pin leadless
package (4mm × 4mm QFN) with a 0.5mm pitch.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
OMAP, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007, Texas Instruments Incorporated