Details

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BUY LM2674MX-5.0/NOPB https://www.utsource.net/itm/p/12611971.html

Parameter	Symbol	Min	Typ	Max	Unit	Notes
Input Voltage	VIN	4.5	-	28	V
Output Voltage	VOUT	-	5.0	-	V	Fixed
Output Current	IOUT	-	1.5	3.0	A
Quiescent Current	IQ	-	4.0	5.0	mA
Dropout Voltage	VDROPOUT	-	1.2	1.8	V	@ IOUT = 1A, VIN = 5V
Efficiency	畏	-	90	-	%	@ IOUT = 1A, VIN = 12V
Switching Frequency	fSW	-	150	-	kHz
Load Regulation	-	-	0.2	0.5	%	0 < IOUT < 3A, VIN = 12V
Line Regulation	-	-	0.1	0.2	%/V	IOUT = 1A, 4.5V < VIN < 28V
Thermal Shutdown	TSD	-	160	-	掳C
Short-Circuit Protection	SCP	-	-	-	-	Auto-restart

Instructions for Use:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 4.5V to 28V.
   • Use appropriate input capacitors (typically 10渭F ceramic) to stabilize the input.

2. Output Voltage (VOUT):

   • The output voltage is fixed at 5.0V. No external resistors are required for voltage setting.

3. Output Current (IOUT):

   • The device can provide up to 3.0A of output current, with a typical output current of 1.5A.
   • Use appropriate output capacitors (typically 10渭F ceramic) to filter the output.

4. Quiescent Current (IQ):

   • The quiescent current is typically 4.0mA and can go up to 5.0mA.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is the difference between the input and output voltages when the regulator is operating near its maximum output current. It is typically 1.2V to 1.8V at 1A output current and 5V input.

6. Efficiency (畏):

   • The efficiency is typically 90% at 1A output current and 12V input.

7. Switching Frequency (fSW):

   • The switching frequency is fixed at 150kHz.

8. Load Regulation:

   • The load regulation is the change in output voltage with respect to changes in load current. It is typically 0.2% to 0.5%.

9. Line Regulation:

   • The line regulation is the change in output voltage with respect to changes in input voltage. It is typically 0.1% to 0.2% per volt.

10. Thermal Shutdown (TSD):

    • The device will shut down if the temperature exceeds 160掳C to prevent damage.

11. Short-Circuit Protection (SCP):

    • The device has built-in short-circuit protection with auto-restart functionality.

Layout Considerations:

• Place the input and output capacitors as close as possible to the IC to minimize parasitic inductance.
• Use wide traces for the input and output paths to handle high currents efficiently.
• Ensure proper heat dissipation by using a heatsink or PCB copper pour if operating at high currents or in high ambient temperatures.

(For reference only)