Datasheet
Table Of Contents
- 1 Introduction
- 2 TPS650250EVM Electrical Performance Specifications
- 3 Modifications
- 4 Schematic
- 5 Connector and Test Point Descriptions
- 5.1 J1 –VIN
- 5.2 J2 – GND
- 5.3 J3 – VINLDO/GND
- 5.4 J4 – VDCDC1
- 5.5 J5 – GND
- 5.6 J6 – VDCDC2
- 5.7 J7 – GND
- 5.8 J8 – VDCDC3
- 5.9 J9 – GND
- 5.10 J10 – VDLO1
- 5.11 J11 – GND
- 5.12 J12 – VDLO2
- 5.13 J13 – GND
- 5.14 J14 – VDD_ALIVE/GND
- 5.15 J15 – PWRFAIL/GND
- 5.16 JP1 – EN_DCDC1
- 5.17 JP2 – EN_DCDC2
- 5.18 JP3 – EN_DCDC3
- 5.19 JP4 – EN_LDO
- 5.20 JP5 – SCALE_DCDC3
- 5.21 JP6 – MODE
- 5.22 JP7 – EN_VDD_ALIVE
- 5.23 JP8 – DEF1
- 5.24 JP9 – DEF2
- 5.25 Factory Jumper Setup
- 6 EVM Assembly Drawings and Layout
1 Introduction
1.1 Description
1.2 Applications
1.3 Features
Introduction
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The TPS650250 provides 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 TPS650250 also integrates two general purpose 200mA LDO voltage regulators, which are enabled
with an external input pin. 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 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. TPS650250 comes in a small 5mm × 5mm 32 pin QFN package (RHB).
• Smart / Cellular Phone
• Digital Still Cameras
• Samsung ARM based Processors, etc
• Freescale™ i.MX31 procesors, etc.
• Split Supply DSP and uP Solutions
• Input Voltage Range : 3.3V up to 5.5V
• All Output DCDC Converters and LDOs Externally Adjustable
• Default Output Voltages for DCDC1 and DCDC2
• Output Current Rating : 1.6-A (DCDC1) / 0.8-A (DCDC2) / 0.8-A (DCDC3) 0.2-A (LDO1, LDO2)
• 2.25-MHz Switching Frequency
• Thermal Shutdown Protection
Using the TPS650250EVM Power Management IC for Li-Ion Powered Systems2 SLVU290 – July 2009
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