A good PCB layout for the TPS61040DDCT involves placing the input and output capacitors close to the device, using a solid ground plane, and keeping the high-current paths short and wide. It's also recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
The input capacitor should have a low ESR and be rated for the input voltage. A ceramic capacitor with an X5R or X7R dielectric is recommended. The output capacitor should be chosen based on the output voltage and current requirements, and should have a low ESR and a high ripple current rating.
The TPS61040DDCT is rated for operation from -40°C to 125°C, but the maximum ambient temperature range depends on the specific application and the thermal design. It's recommended to follow the thermal design guidelines in the datasheet and to perform thermal simulations to ensure the device operates within its specified temperature range.
The output voltage of the TPS61040DDCT is set by the resistive divider network consisting of RFBT and RFB. The output voltage can be calculated using the formula: VOUT = 0.8V x (1 + RFBT/RFB).
The EN pin is an active-high enable input that allows the device to be turned on and off. When the EN pin is high, the device is enabled and operates normally. When the EN pin is low, the device is disabled and the output is turned off. The EN pin can be connected to a logic signal or a switch to control the device's operation.
TPS61040DDCT datasheet
by Texas Instruments
Findchips
