Instructions for Using NCP1034DG

1. Input Voltage (VIN):

   • Ensure the input voltage is within the specified range (8.5V to 72V).
   • Use appropriate filtering capacitors on the input to reduce noise and ripple.

2. Output Voltage (VOUT):

   • The output voltage can be adjusted using external resistors.
   • Connect the feedback pin (FB) to a voltage divider formed by two resistors (R1 and R2) between VOUT and GND.
   • Use the formula: ( V_ = V_ left(1 + fracright) ), where ( V_ ) is typically 1.25V.

3. Output Current (IOUT):

   • The maximum continuous output current is 250mA.
   • Ensure the load does not exceed this limit to avoid overheating or damage.

4. Quiescent Current (IQ):

   • The quiescent current is very low, making the device suitable for battery-powered applications.
   • In shutdown mode, the quiescent current drops to 1.5mA typical.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is relatively low, allowing the device to operate efficiently even when the input voltage is close to the output voltage.

6. Load and Line Regulation:

   • The load regulation is ±0.25% over the load range, ensuring stable output voltage.
   • The line regulation is ±0.1%/V, maintaining output stability with varying input voltages.

7. Ripple Rejection:

   • The device provides good ripple rejection, reducing the effect of input ripple on the output voltage.

8. Start-up Time (tSTART):

   • The start-up time from 0V to 90% of the output voltage is typically 10ms.

9. Thermal Shutdown (TSD):

   • The device will shut down if the temperature exceeds 160°C to prevent damage.
   • It will automatically recover when the temperature drops below 130°C.

10. Short-Circuit Protection:

    • The device includes short-circuit protection in hiccup mode, which limits the current and cycles the output on and off to prevent overheating.

Additional Considerations:

• PCB Layout:

  • Ensure proper thermal management by providing adequate copper area for heat dissipation.
  • Keep the input and output capacitors close to the device to minimize parasitic inductance.

• Capacitors:

  • Use ceramic capacitors for input and output filtering due to their low ESR and high frequency performance.
  • Typical values are 10μF for the input and 10μF for the output.

• Application Circuits:

  • Refer to the datasheet for recommended application circuits and layout guidelines to ensure optimal performance.