Texas Instruments Evaluation Module for 1A Positive Fixed Voltage Linear Regulator TLV1117LV33EVM-714 TLV1117LV33EVM-714 데이터 시트
제품 코드
TLV1117LV33EVM-714
Setup
2
Setup
This section describes the jumpers and connectors on the EVM as well as how to properly connect, setup
and use the TLV1117LVxxEVM-714.
and use the TLV1117LVxxEVM-714.
2.1
Input/Output Connectors and Jumper Descriptions
2.1.1
J1
–
VIN
Input power supply voltage connector.The positive input lead and ground return lead from the input power
supply should be twisted and kept as short as possible to minimize EMI transmission. Additional bulk
capacitance should be added between J1 and J2 if the supply leads are greater than six inches. For
example, an additional 47
supply should be twisted and kept as short as possible to minimize EMI transmission. Additional bulk
capacitance should be added between J1 and J2 if the supply leads are greater than six inches. For
example, an additional 47
µ
F electrolytic capacitor connected from J1 to ground can improve the transient
response of the TLV1117LVxx while eliminating unwanted ringing on the input due to long wire
connections.
connections.
2.1.2
J2
–
VOUT
Regulated output voltage connector.
2.1.3
J3
–
GND
Ground-return connector for the input power supply.
2.1.4
J4
–
GND
Output ground-return connector.
2.2
Soldering Guidelines
Any solder re-work 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 6V. Connect the
positive voltage lead from input power supply to V
positive voltage lead from input power supply to V
IN
, 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 0-1A load between the output, V
OUT
at connector J2, and ground, GND at connector J4.
3
Operation
•
Turn on the input power supply. For initial operation it is recommended that the input power supply, V
IN
–
J1, be set to 5 V.
•
Vary the respective loads and V
IN
voltages as necessary for test purposes.
4
Test Results
This section provides typical performance waveforms for the TLV1117LV18EVM-714 printed-circuit board.
These tests were performed with the 1.8-V version of the TLV1117LV18EVM-714 evaluation module.
These tests were performed with the 1.8-V version of the TLV1117LV18EVM-714 evaluation module.
4.1
Turn-on Sequence
shows the turn-on/off characteristic where 3.3V is applied to VIN. The output drives full load (1A).
The output voltage startup ramp is not load dependant.
2
TLV1117LVxxEVM-714 Evaluation Module
SLVU449B
–
March 2011
–
Revised May 2011
Copyright
©
2011, Texas Instruments Incorporated