Texas Instruments TPS7A7001 Very Low Input, Low-Dropout Linear Regulator Evaluation Module TPS7A7001EVM-065 TPS7A7001EVM-065 데이터 시트
제품 코드
TPS7A7001EVM-065
Introduction
1
Introduction
The Texas Instruments TPS7A7001EVM-065 evaluation module (EVM) helps design engineers to
evaluate the operation and performance of the TPS7A7001 family of linear regulators for use in their own
circuit applications. This particular EVM configuration contains a single linear regulator with internal
thermal and current-limit shutdown circuitry in a SOIC-8 package. 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 very low-dropout voltage.
evaluate the operation and performance of the TPS7A7001 family of linear regulators for use in their own
circuit applications. This particular EVM configuration contains a single linear regulator with internal
thermal and current-limit shutdown circuitry in a SOIC-8 package. 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 very low-dropout voltage.
2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, set
up, and use the TPS7A7001EVM-065.
up, and use the TPS7A7001EVM-065.
2.1
Input/Output Connectors and Jumper Descriptions
The connectors are shown in
, Assembly Layer.
2.1.1
J1
–
VIN
J1 is the input power supply voltage connector. Twist the positive input lead and ground return lead from
the input power supply and keep as short as possible to minimize EMI transmission. Add additional bulk
capacitance between J1 and J3 if the supply leads are greater than 6 inches. For example, an additional
47-
the input power supply and keep as short as possible to minimize EMI transmission. Add additional bulk
capacitance between J1 and J3 if the supply leads are greater than 6 inches. For example, an additional
47-
µ
F electrolytic capacitor connected from J1 to ground can improve the transient response of the
TPS7A7001, while eliminating unwanted ringing on the input due to long-wire connections.
2.1.2
J2
–
VOUT
J2 is the regulated output voltage connector.
2.1.3
J3
–
GND
J3 is the ground-return connector for the input power supply.
2.1.4
J4
–
GND
J4 is the output ground-return connector.
2.2
Soldering Guidelines
Any solder rework to modify the EVM for the purpose of repair or other application reasons must be
performed using a hot-air system to avoid damaging the integrated circuit (IC).
performed using a hot-air system to avoid damaging the integrated circuit (IC).
2.3
Equipment Setup
•
Turn off the input power supply after verifying that its output voltage is set to less than 7 V. Connect
the positive voltage lead from the input power supply to VIN at the J1 connector of the EVM. Connect
the ground lead from the input power supply to GND at the J3 connector of the EVM.
the positive voltage lead from the input power supply to VIN at the J1 connector of the EVM. Connect
the ground lead from the input power supply to GND at the J3 connector of the EVM.
•
Connect a 0-A to 2-A load between the output, VOUT, at connector J2, and ground, GND, at connector
J4.
J4.
3
Operation
•
Turn on the input power supply. For initial operation set the input power supply, VIN
–
J1, to 5 V.
•
Vary the respective loads and VIN voltages as necessary for test purposes.
4
Test Results
This section provides typical performance waveforms for the TPS7A7001EVM-065 printed-circuit board
(PCB).
(PCB).
2
TPS7A7001EVM-065 Evaluation Module
SLVU581
–
January 2012
Copyright
©
2012, Texas Instruments Incorporated