A good PCB layout for the DMP2160U-7 should include a solid ground plane, wide copper traces for power and ground, and a thermal relief pattern under the device. A minimum of 2oz copper thickness is recommended. Additionally, a thermal via array under the device can help to dissipate heat more efficiently.
To ensure proper biasing, the DMP2160U-7 requires a stable input voltage (VIN) between 4.5V to 36V, and a stable output voltage (VOUT) set by the external resistive divider. The device also requires a minimum input capacitance of 10uF and a minimum output capacitance of 22uF for stability.
The PSRR of the DMP2160U-7 is affected by the quality of the input capacitor (CIN), the output capacitor (COUT), and the resistive divider (R1 and R2) that sets the output voltage. Using high-quality, low-ESR capacitors and 1% tolerance resistors can help to optimize the PSRR.
The DMP2160U-7 has built-in overcurrent protection (OCP) and thermal shutdown (TSD) features. However, additional protection can be achieved by adding an external current sense resistor (RSENSE) and a thermal monitor IC. A fuse or a PTC resettable fuse can also be used to protect the device from overcurrent conditions.
The recommended startup sequence for the DMP2160U-7 is to first apply the input voltage (VIN), followed by the enable signal (EN). This ensures that the device is properly biased and configured before the output voltage (VOUT) is enabled.
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