Description:5.0 V and 3.3 V Versions Available; Low Quiescent Current in Standby Mode; Programmable Spread Spectrum for EMI Reduction; 2 Microcontroller-Enabled Low Voltage Synchronous Buck Converters; Large Conversion Ratio of 18 V to 3.3 V Battery Connected Switcher; Wide Input of 4.1 to 45 V with Undervoltage Lockout (UVLO); Fixed Frequency Operation Adjustable from 2.0 to 2.6 MHz; Internal 1.5 ms Soft−starts; Cycle−by−cycle Current Limit Protections; Hiccup Overcurrent Protections (OCP); Individual Reset Pins with
The recommended PCB layout for optimal thermal performance involves placing thermal vias under the device, using a solid ground plane, and keeping the thermal traces as short and wide as possible. A 4-layer PCB with a dedicated thermal layer is also recommended.
To ensure reliable operation in high-temperature environments, it's essential to follow the recommended thermal design guidelines, use a suitable thermal interface material, and ensure good airflow around the device. Additionally, consider using a heat sink or a thermal shield to reduce the junction temperature.
The recommended input capacitors are X7R or X5R ceramic capacitors with a minimum capacitance of 10uF and a voltage rating of 50V. For output capacitors, use X7R or X5R ceramic capacitors with a minimum capacitance of 22uF and a voltage rating of 50V. The capacitor selection should be based on the specific application requirements and operating conditions.
To troubleshoot issues with the device's overcurrent protection feature, check the input voltage, output current, and sense resistor values. Ensure that the sense resistor is correctly connected and has the recommended value. Also, verify that the device is not overheating, and the PCB layout is correct. If the issue persists, consult the datasheet and application notes for further guidance.
The recommended startup sequence for the NCV97311MW50AR2G involves applying the input voltage (VIN) first, followed by the enable signal (EN). This ensures that the device is properly biased and configured before the output voltage is enabled.
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NCV97311MW50AR2G Overview
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