Texas Instruments provides a recommended PCB layout in the datasheet, but it's also important to follow general best practices for power management ICs, such as keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing trace lengths and widths to reduce parasitic inductance and resistance.
The output voltage of the TPS70751PWPR can be calculated using the formula: VOUT = VREF x (1 + R1/R2), where VREF is the internal reference voltage (1.5V), and R1 and R2 are the resistors used to set the output voltage. The datasheet provides a detailed explanation of the calculation and a table of recommended resistor values for common output voltages.
The TPS70751PWPR has an absolute maximum input voltage rating of 12V, but the recommended maximum input voltage is 10V to ensure reliable operation and to prevent damage to the device. Exceeding the recommended maximum input voltage can reduce the device's lifespan or cause it to fail.
To ensure stability, it's essential to follow the recommended component values and PCB layout guidelines in the datasheet. Additionally, the input and output capacitors should be selected to meet the minimum recommended values, and the device should be operated within its recommended operating conditions. If oscillation occurs, it may be necessary to add additional capacitance or resistance to the output or input to dampen the oscillation.
The TPS70751PWPR is rated for operation up to 125°C, but its performance and reliability may be affected at high temperatures. It's essential to follow the recommended operating conditions and to consider the device's thermal characteristics, such as its junction-to-ambient thermal resistance, when designing for high-temperature applications.
TPS70751PWPR datasheet
by Texas Instruments
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