Texas Instruments Evaluation Module for TPS650001 TPS650001EVM-585 TPS650001EVM-585 Datenbogen
Produktcode
TPS650001EVM-585
www.ti.com
Connector and Test Point Description
4
Connector and Test Point Description
4.1
JP1 – ENDCDC
Placing a shorting bar between ENDCDC and ON ties the EN pin of the DCDC converter to VIN, thereby
enabling the DCDC converter. Placing a shorting bar between ENDCDC and OFF ties the EN pin of the
DCDC converter to GND, thereby disabling the DCDC converter.
enabling the DCDC converter. Placing a shorting bar between ENDCDC and OFF ties the EN pin of the
DCDC converter to GND, thereby disabling the DCDC converter.
4.2
JP2 – ENLDO1
Placing a shorting bar between ENLDO1 and ON ties the EN pin of LDO1 to VIN, thereby enabling LDO1.
Placing a shorting bar between ENLDO1 and OFF ties the EN pin of LDO1 to GND, thereby disabling
LDO1.
Placing a shorting bar between ENLDO1 and OFF ties the EN pin of LDO1 to GND, thereby disabling
LDO1.
4.3
JP3 – ENLDO2
Placing a shorting bar between ENLDO2 and ON ties the EN pin of LDO2 to VIN, thereby enabling LDO2.
Placing a shorting bar between ENLDO2 and OFF ties the EN pin of LDO2 to GND, thereby disabling
LDO2.
Placing a shorting bar between ENLDO2 and OFF ties the EN pin of LDO2 to GND, thereby disabling
LDO2.
4.4
JP4 – MODE
JP4 selects the forced PWM or Power Save Mode (PSM) operation for the DCDC converter. Placing a
shorting bar between MODE and PWM ties the MODE pin of TPS650001/3/6 to VIN, thereby selecting
forced PWM operating mode for the DCDC converter. Placing a shorting bar between MODE and PFM
ties the MODE pin of TPS650001/3/6 to GND, thereby selecting Power Save Mode operating mode for the
DCDC converter at light-load conditions. If Power Save Mode is selected the DCDC converter will
automatically switch to PWM mode at heavier load conditions.
shorting bar between MODE and PWM ties the MODE pin of TPS650001/3/6 to VIN, thereby selecting
forced PWM operating mode for the DCDC converter. Placing a shorting bar between MODE and PFM
ties the MODE pin of TPS650001/3/6 to GND, thereby selecting Power Save Mode operating mode for the
DCDC converter at light-load conditions. If Power Save Mode is selected the DCDC converter will
automatically switch to PWM mode at heavier load conditions.
4.5
JP5 – VINLDO1
This header is the input supply for LDO1. Placing a shorting bar between VINLDO1 and VINDC/VODCDC
supplies LDO1 from VIN with R2. It can be also supplied from the output of the converter VODCDC with
R1 (not assembled). An external power supply can be connected between JP5 pin 2 (VINLDO1) and pin 3
(GND). Please note that the resistors R1 and R2 should be removed when supplying the LDO from an
external power supply.
supplies LDO1 from VIN with R2. It can be also supplied from the output of the converter VODCDC with
R1 (not assembled). An external power supply can be connected between JP5 pin 2 (VINLDO1) and pin 3
(GND). Please note that the resistors R1 and R2 should be removed when supplying the LDO from an
external power supply.
4.6
JP6 – VINLOD2
This header is the input supply for LDO2. Placing a shorting bar between VINLDO2 and VINDC/VODCDC
supplies LDO2 from VIN with R4. It can be also supplied from the output of the converter VODCDC with
R3 (not assembled). An external power supply can be connected between JP6 pin 2 (VINLDO2) and pin 3
(GND). Note that the resistors R3 and R4 should be removed when supplying the LDO from an external
power supply.
supplies LDO2 from VIN with R4. It can be also supplied from the output of the converter VODCDC with
R3 (not assembled). An external power supply can be connected between JP6 pin 2 (VINLDO2) and pin 3
(GND). Note that the resistors R3 and R4 should be removed when supplying the LDO from an external
power supply.
4.7
J1 – VIN/GND
The input power supply has to be connected to this header. The power supply must be connected
between J1 pins 1 and 2 (positive connection) and J1 pins 3 and 4 (GND). The leads to the input supply
should be twisted and kept as short as possible. The input voltage has to be between 3.3-V and 6-V.
between J1 pins 1 and 2 (positive connection) and J1 pins 3 and 4 (GND). The leads to the input supply
should be twisted and kept as short as possible. The input voltage has to be between 3.3-V and 6-V.
4.8
J2 – VODCDC/GND
This header is the output of the step-down converter. This output voltage is internally fixed for the
TPS650001/3/6 (see
TPS650001/3/6 (see
). VODCDC is capable of sourcing up to 600-mA. A load can be connected
between J2 pins 1 and 2 (positive connection) and J2 pins 3 and 4 (GND).
5
SLVU357 – March 2010
Using the TPS650001/3/6 2.25 MHz Step-Down Converter with Dual LDO
Copyright © 2010, Texas Instruments Incorporated