This user’s guide describes the operational use of the UA78LEVM-075 evaluation module (EVM) as a reference design for engineering demonstration and evaluation of the UA78L05CPK, low-dropout linear regulator (LDO). Included in this user’s guide are setup and operating instructions, layout guidelines, a printed circuit board (PCB) layout, a schematic diagram, and a bill of materials (BOM). Throughout this document, the terms demonstration kit, evaluation board, evaluation module, and EVM are synonymous with the UA78LEVM-075.
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Texas Instruments' UA78LEVM-075 EVM helps design engineers evaluate the operation and performance of the UA78L05CPK linear regulator for possible use in their own circuit application. This particular EVM configuration contains a single 100-mA, 3-terminal, low-dropout regulator for general applications. The regulator is capable of delivering up to 100 mA and has a VIN range of up to 20 V. Although not required for stability for the UA78L05CPK, use a 0.1µF (or larger) bypass capacitor on the output, Cout.
This evaluation module is not encapsulated and has exposed terminals with voltages that are connected to the main power supply. The following warnings are noted for the safety of anyone using or working close to the UA78LEVM-075. Observe all safety precautions.
Failure to adhere to these steps or to not heed the safety requirements at each step may lead to shock, injury, and damage to the hardware. Texas Instruments is not responsible or liable in any way for shock, injury, or damage caused by negligence or failure to heed advice. If you are not trained in the proper safety of handling and testing power electronics please do not test this evaluation module.
Danger: HIGH VOLTAGE! This evaluation board is intended for professional use only. This board has exposed high voltages. Do not operate this board without proper high-voltage and high-current safety practices. Read this user guide carefully before testing with UA78LEVM-075. Use floating measurement equipment such as high-voltage differential scope probes and see Section 3 and Section 4 for proper EVM setup and test equipment connection.
CAUTION: |
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Caution! Do not leave the EVM powered when unattended. |
HOT SURFACE: |
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Caution Hot Surface! Contact can cause burns. Do not touch. Please take the proper precautions when operating. |
HIGH VOLTAGE: |
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Danger High Voltage! Electric shock is possible when connecting the board to live wire. The board must be handled with care by a professional. For safety, using isolated test equipment with overvoltage and overcurrent protection is highly recommended. |
Figure 2-1 shows the schematic for the UA78LEVM-075.