TPS650240 Datasheet, PDF (1/34 Pages) Texas Instruments – Power Management ICs for Li-Ion Powered Systems

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Power Management ICs for Li-Ion Powered Systems
TPS650240
TPS650241
TPS650242
SLVS774 – JUNE 2007
FEATURES
• 1.6A or 1.0A, 97% Efficient Step-Down
Converter for System Voltage (VDCDC1)
– 3.3V or 2.80V or Adjustable
• 1.0A or 0.8A, up to 95% Efficient Step-Down
Converter for Memory Voltage (VDCDC2)
– 1.8V or 2.5V or Adjustable
• 0.8A, 90% Efficient Step-Down Converter for
Processor Core (VDCDC3)
• Two Selectable Voltages for VDCDC3
– TPS650240:
– DEFDCDC3= LOW: Vo = 1.0V
– DEFDCDC3= HIGH: Vo = 1.3V
– TPS650241:
– DEFDCDC3= LOW: Vo = 0.9V
– DEFDCDC3= HIGH: Vo = 1.375V
– TPS650242:
– DEFDCDC3= LOW: Vo = 1.0V
– DEFDCDC3= HIGH: Vo = 1.5V
• 30mA LDO for Vdd_alive
• 2 × 200 mA General Purpose LDOs (LDO1 and
LDO2)
• Dynamic Voltage Management for Processor
Core
• LDO1 and LDO2 Voltage Externally Adjustable
• Separate Enable Pins for Inductive Converters
• 2.25 MHz Switching Frequency
• 85 μA Quiescent Current
• Thermal Shutdown Protection
APPLICATIONS
• PDA
• Cellular/Smart Phone
• GPS
• Digital Still Camera
• Split Supply DSP and μP Solutions:, Samsung
ARM-Based Processors, etc.
DESCRIPTION
The TPS65024x are integrated Power Management
ICs for applications powered by one Li-Ion or
Li-Polymer cell, which require multiple power rails.
The TPS65024x provide three highly efficient,
step-down converters targeted at providing the core
voltage, peripheral, I/O and memory rails in a
processor based system. 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 converters can be forced into
fixed frequency PWM mode by pulling the MODE pin
high. The TPS65024x also integrate 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 output voltage of the LDOs can be set with an
external resistor divider for maximum flexibility.
Additionally there is a 30mA LDO typically used to
provide power in a processor based system to a
voltage rail that is always on. TPS65024x provide
voltage scaling on DCDC3 using the DEFDCDC3
pin. This pin either needs to be connected to a logic
HIGH or logic LOW level to set the output voltage of
DCDC3. TPS65024x come in a small 5mm x 5mm
32 pin QFN package (RHB).
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.
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