Texas Instruments TPS7A8101 Low-Noise, High-Bandwidth PSRR, Low-Dropout 1-A Linear Regulator Evaluation Module TPS7A8101 TPS7A8101EVM-093 데이터 시트
제품 코드
TPS7A8101EVM-093
Introduction
1
Introduction
The TPS7A8101EVM evaluation module helps designers evaluate the operation and performance of the
TPS7A8101 adjustable-output LDO. Because the TPS7A8101 is adjustable, the EVM has been designed
to provide several common output voltages which can be selected using an onboard jumper. The EVM
can provide output voltages of 1.8 V, 2.5 V, 2.8 V or 3.3 V using the jumper. Other output voltages can be
evaluated but require changing the feedback resistors.
TPS7A8101 adjustable-output LDO. Because the TPS7A8101 is adjustable, the EVM has been designed
to provide several common output voltages which can be selected using an onboard jumper. The EVM
can provide output voltages of 1.8 V, 2.5 V, 2.8 V or 3.3 V using the jumper. Other output voltages can be
evaluated but require changing the feedback resistors.
2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TPS7A8101EVM.
up, and use the TPS7A8101EVM.
2.1
Input/Output Connector Descriptions
2.1.1
J1
–
VIN
This is the positive input supply voltage. The connector for J1 is not populated on the TPS7A8101EVM.
This footprint allows the mounting of an SMA-style connector for more accurate PSRR measurements.
See the bill of materials (BOM) for the manufacturer and part number of the corresponding connector.
This footprint allows the mounting of an SMA-style connector for more accurate PSRR measurements.
See the bill of materials (BOM) for the manufacturer and part number of the corresponding connector.
2.1.2
J2
–
VOUT
This is the output voltage. The connector for J2 is not populated on the TPS7A8101EVM. This footprint
allows the mounting of an SMA-style connector for more accurate PSRR measurements. See the BOM for
the manufacturer and part number of the corresponding connector.
allows the mounting of an SMA-style connector for more accurate PSRR measurements. See the BOM for
the manufacturer and part number of the corresponding connector.
2.1.3
J3
–
VIN
This is the positive connection to the input power supply. The power supply must be connected between
J1 and J8 (GND). Twist the leads to the input supply, and keep them as short as possible. The input
voltage must be between 2.2 V and 6.5 V.
J1 and J8 (GND). Twist the leads to the input supply, and keep them as short as possible. The input
voltage must be between 2.2 V and 6.5 V.
2.1.4
J4
–
VOUT
This is the positive output voltage of the LDO. The output voltage of the TPS7A8101 is adjustable with
feedback resistors. On the EVM, the output voltage is set using J6.
feedback resistors. On the EVM, the output voltage is set using J6.
2.1.5
J5
–
ENABLE
This jumper is used to enable or disable the output of the TPS7A8101. Placing a shorting jumper between
pins 1 and 2 (ON position) enables the TPS7A8101. Placing the shorting jumper between pins 2 and 3
(OFF position) disables the TPS7A8101.
pins 1 and 2 (ON position) enables the TPS7A8101. Placing the shorting jumper between pins 2 and 3
(OFF position) disables the TPS7A8101.
2.1.6
J6
–
Output Voltage Select
This jumper is used to set the desired output voltage from the TPS7A8101. Placing a shorting jumper
between the appropriate pins gives the corresponding outputs. The output voltage of the TPS7A8101EVM
must only be changed when the TPS7A8101EVM is not powered. Installing and removing the jumper with
the board powered can lead to undesired or unregulated output voltage
between the appropriate pins gives the corresponding outputs. The output voltage of the TPS7A8101EVM
must only be changed when the TPS7A8101EVM is not powered. Installing and removing the jumper with
the board powered can lead to undesired or unregulated output voltage
Short Pins
VOUT (V)
1 and 2
3.3
3 and 4
2.8
5 and 6
2.5
7 and 8
1.8
2
TPS7A8101EVM Evaluation Module
SLVU600
–
December 2011
Copyright
©
2011, Texas Instruments Incorporated