Texas Instruments TPS7A8300EVM-209, Руководство пользователя

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Introduction
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1 Introduction
The Texas Instruments TPS7A8300EVM-209 EVM helps design engineers to evaluate the operation and
performance of the TPS7A8300 family of linear regulators for possible use in their own circuit application.
This particular EVM configuration contains a single linear regulator for high-speed communication
systems. The regulator is capable of delivering up to 2 A to the load, depending on the input-output power
dissipation across the part which can be minimized because of the low dropout voltage. The output
capacitor for the TPS7A8300 must be 10 µF (effective minimum) for stability.
2 Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, setup,
and use the TPS7A8300EVM-209.
2.1 Input/Output Connectors and Jumper Descriptions
2.1.1 J1 – VIN
Input power supply voltage connector. Twist the positive input lead and ground return lead from the input
power supply and keep them as short as possible to minimize EMI transmission. Add additional bulk
capacitance between J1 and J2 if the supply leads are greater than six inches. For example, an additional
47-µF electrolytic capacitor connected from J1 to ground can improve the transient response of the
TPS7A8300 while eliminating unwanted ringing on the input due to long wire connections.
2.1.2 J2 – GND
Return connector for the input power supply.
2.1.3 J3 – VOUT
Regulated output voltage connector.
2.1.4 J4 – GND
Output ground return connector.
2.1.5 J5 – Input Connector
For output currents greater than 1 A, it is advisable to use a higher current rated connector. Pin1 connects
to the input power supply. Pin 2 connects to the return connector for the input power supply.
2.1.6 J6 – Output Connector
For output currents greater than 1 A, it is advisable to use a higher current rated connector. Pin1 connects
to the input power supply. Pin 2 connects to the return connector for the input power supply.
2.1.7 JP1 – EN
Output enable. To enable the output, connect a jumper to short the VIN pin 1 or VBIAS pin 3 to the EN
center pin 2. To disable the output, leave JP1 floating. EN is pulled down to GND through resistor R5
when JP1 is not connected.
2.1.8 JP2 – AnyOut
The output voltage of the TPS7A8300 is selectable in accordance with the names given to the output
voltage setting pins: 50 mV, 100 mV, 200 mV, 400 mV, 800 mV, and 1.6 V. For each pin connected to the
ground, the output voltage setting increases by the value associated with that pin name, starting from the
value of the reference voltage of 0.8 V; floating the pin(s) has no effect on the output voltage.
2 TPS7A8300EVM-209 Evaluation Module SLVU919 – June 2013
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Copyright © 2013, Texas Instruments Incorporated
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