Texas Instruments recommends a layout with a star-ground configuration, where the GND pin is connected to a solid ground plane. Additionally, keep the input and output traces short and away from each other to minimize noise coupling. Place the device close to the power supply and use a 0.1uF decoupling capacitor between VCC and GND.
The thermal shutdown feature is designed to protect the device from overheating. If the device exceeds the thermal shutdown temperature (typically 150°C), it will shut down. To handle this, ensure good thermal design, use a heat sink if necessary, and monitor the device temperature. If a shutdown occurs, allow the device to cool before restarting.
The recommended input voltage range for the TLV2781CDBVR is 2.7V to 5.5V. The output voltage is regulated to 2.8V ±2% for a 2.7V to 5.5V input range. If the input voltage falls below 2.7V, the output voltage may drop below 2.8V.
The output voltage tolerance is specified as ±2% of the nominal output voltage (2.8V). To calculate the tolerance, multiply the nominal output voltage by the tolerance percentage (e.g., 2.8V x 0.02 = 0.056V). The output voltage can vary by ±0.056V from the nominal value.
The maximum output current capability of the TLV2781CDBVR is 150mA. Exceeding this limit can cause the device to overheat, reduce its output voltage, or even shut down. Ensure that the output current is within the specified limit to maintain optimal performance.
TLV2781CDBVR datasheet
by Texas Instruments
