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J12 - VOUT DCDC2
J12 - VOUT DCDC2
This header is the positive output of VDCDC2 step-down converter. This output is externally adjustable for
the TPS65053 and is programmed to a value of 1.8-V on the EVM. VDCDC2 is capable of sourcing up to
600-mA. A load can be connected between J12 and J13 (GND). Applications using Freescale™ i.MX27
can can utilize J12-VOUT DCDC2 to power the QVDD rail of the i.MX27 processor.
J13 - GND
J13 is the return connection of VOUT VDCDC2 output rail. A load can be connected between J13 and J12
(VOUT DCDC2).
JP1 - VIN_LDO1
JP1 selects the input voltage source for LDO1.
Place a shorting bar in the VOUT_DCDC1 position to select the output of VDCDC1 converter as input
voltage source for LDO1.
Place a shorting bar in the VIN position to select the input voltage as input source for LDO1.
JP2 - VIN_LDO2/3
JP2 selects the input voltage source for LDO2 and LDO3.
Place a shorting bar in the VOUT_DCDC1 position to select the output of VDCDC1 converter as input
voltage source for LDO2 and LDO3.
Place a shorting bar in the VIN position to select the input voltage as input source for LDO2 and LDO3.
JP3 - EN_LDO1
Placing a shorting bar between EN LDO1 and ON ties the EN pin of LDO1 to VIN, thereby enabling LDO1.
Placing a shorting bar between EN LDO1 and OFF ties the EN pin of LDO1 to GND, thereby disabling
LDO1.
JP4 - EN_DCDC2
Placing a shorting bar between EN_DCDC2 and ON ties the EN pin of DCDC2 to VIN, thereby enabling
DCDC2. Placing a shorting bar between EN_DCDC2 and OFF ties the EN pin of DCDC2 to GND, thereby
disabling DCDC2.
JP5 - EN_DCDC1
Placing a shorting bar between EN_DCDC1 and ON ties the EN pin of DCDC1 to VIN, thereby enabling
DCDC1. Placing a shorting bar between EN_DCDC1 and OFF ties the EN pin of DCDC1 to GND, thereby
disabling DCDC1.
JP6 - MODE Input
JP6 selects the forced PWM or Power Save Mode (PSM) operation for the switching converters DCDC1
and DCDC2.
Placing a shorting bar between MODE and PWM ties the MODE pin of TPS65053 to VIN, thereby
selecting forced PWM operating mode for the DCDC converters. Placing a shorting bar between MODE
and PSM (Power Save Mode) ties the MODE pin of TPS65053 to GND, thereby selecting Power Save
Mode operating mode for the DCDC converters at light-load conditions. If Power Save Mode is selected
the DCDC converters will automatically switch to PWM mode at havier load conditions.
JP7 - EN_LDO2
Placing a shorting bar between EN LDO2 and ON ties the EN pin of LDO2 to VIN, thereby enabling LDO2.
Placing a shorting bar between EN LDO2 and OFF ties the EN pin of LDO2 to GND, thereby disabling
LDO2.
JP8 - EN_LDO3
Placing a shorting bar between EN LDO3 and ON ties the EN pin of LDO3 to VIN, thereby enabling LDO3.
Placing a shorting bar between EN LDO3 and OFF ties the EN pin of LDO3 to GND, thereby disabling
LDO3.
SLVU262 – February 2009
TPS65053EVM-389
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