Details

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BUY AN78M18 https://www.utsource.net/itm/p/12609809.html

Parameter	Description	Value	Unit
Input Voltage	Maximum input voltage the device can handle	28	V
Output Voltage	Fixed output voltage	5	V
Output Current	Maximum continuous output current	1.5	A
Dropout Voltage	Minimum input-output voltage difference for regulation	1.2	V
Quiescent Current	Current consumed by the regulator itself	5	mA
Load Regulation	Change in output voltage due to load changes	0.5	%
Line Regulation	Change in output voltage due to input changes	0.3	%
Ripple Rejection	Ability to reject ripple from the input	60	dB
Operating Temperature	Ambient temperature range	-40 to 125	掳C
Storage Temperature	Temperature range for storage	-65 to 150	掳C

Instructions for AN78M18:

1. Input Connection:

   • Connect the input terminal to a power source that provides an input voltage within the specified range (up to 28V).

2. Output Connection:

   • Ensure the load connected to the output does not exceed the maximum output current of 1.5A.

3. Grounding:

   • Properly connect the ground terminal to ensure stable operation and effective heat dissipation.

4. Capacitors:

   • Place a 0.33渭F capacitor between the input and ground to filter noise.
   • Use a 0.1渭F capacitor between the output and ground to stabilize the output voltage.

5. Heat Sink:

   • For applications where the device may approach its thermal limits, consider attaching a heat sink to the package to enhance heat dissipation.

6. PCB Layout:

   • Keep the layout compact to minimize parasitic inductances and capacitances which can affect performance.
   • Ensure adequate spacing around the component for cooling purposes.

7. Operating Conditions:

   • Operate the device within the specified temperature ranges to avoid damage or reduced performance.
   • Monitor the dropout voltage to ensure the input voltage is sufficiently higher than the output voltage for proper regulation.

(For reference only)