Details

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BUY LM2940CT-5.0P+ https://www.utsource.net/itm/p/12610517.html

Parameter	Symbol	Min	Typ	Max	Unit
Input Voltage	VIN	7.0	-	28	V
Output Voltage	VOUT	-	5.0	-	V
Output Current	IOUT	-	1.0	-	A
Dropout Voltage	VDROPOUT	-	1.3	-	V
Quiescent Current	IQ	-	6.5	-	mA
Load Regulation	-	-	0.2	-	%
Line Regulation	-	-	0.2	-	%
Ripple Rejection	-	-	70	-	dB
Operating Temperature Range	TOPR	-40	-	125	掳C
Storage Temperature Range	TSTG	-65	-	150	掳C

Instructions for Use:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 7V to 28V. The device will not function properly outside this range.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 5.0V. No external components are required to set this voltage.

3. Output Current (IOUT):

   • The device can provide up to 1.0A of output current. Ensure that the load does not exceed this limit to avoid damage.

4. Dropout Voltage (VDROPOUT):

   • The dropout voltage is typically 1.3V. This means the input voltage must be at least 1.3V higher than the output voltage (5.0V) to maintain regulation.

5. Quiescent Current (IQ):

   • The quiescent current is typically 6.5mA. This is the current consumed by the regulator when no load is present.

6. Load Regulation:

   • The load regulation is 0.2%, indicating that the output voltage will change by only 0.2% with changes in load current.

7. Line Regulation:

   • The line regulation is also 0.2%, indicating that the output voltage will change by only 0.2% with changes in input voltage.

8. Ripple Rejection:

   • The ripple rejection is 70dB, which means the device effectively reduces input ripple by 70dB at the output.

9. Operating Temperature Range (TOPR):

   • The device can operate in temperatures ranging from -40掳C to 125掳C. Ensure the ambient temperature stays within this range to avoid thermal stress.

10. Storage Temperature Range (TSTG):

    • The device can be stored in temperatures ranging from -65掳C to 150掳C. However, it should not be operated outside the operating temperature range.

11. Capacitors:

    • For stable operation, use a 10渭F tantalum capacitor on the output and a 1渭F ceramic capacitor on the input. These capacitors help in filtering noise and maintaining stability.

12. PCB Layout:

    • Ensure proper PCB layout to minimize noise and improve thermal performance. Place the input and output capacitors as close as possible to the regulator pins.

13. Thermal Considerations:

    • If the device is expected to dissipate significant power, consider using a heat sink or providing adequate airflow to keep the temperature within safe limits.

14. Safety:

    • Always follow standard safety guidelines when handling electronic components. Ensure the circuit is powered off and discharged before making any changes.

(For reference only)