Details

---

BUY LM2674M-5.0 https://www.utsource.net/itm/p/12610719.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	7	-	40	V
Output Voltage	VOUT	Fixed	-	5.0	-	V
Output Current	IOUT	Continuous	-	3	-	A
Efficiency	畏	VIN = 12V, IOUT = 3A	-	89	-	%
Dropout Voltage	VDROPOUT	IOUT = 3A	-	1.2	-	V
Quiescent Current	IQ	VIN = 12V, IOUT = 0A	-	4	-	mA
Shutdown Current	ISD	VIN = 12V, SHDN = 0V	-	0.1	-	渭A
Switching Frequency	fSW	-	-	260	-	kHz
Thermal Shutdown Threshold	TSD	-	-	160	-	掳C

Instructions for Use

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 7V to 40V.
   • Use appropriate input capacitors to filter out noise and stabilize the input voltage.

2. Output Voltage (VOUT):

   • The LM2674M-5.0 provides a fixed output voltage of 5.0V.
   • Use an output capacitor to smooth the output and reduce ripple.

3. Output Current (IOUT):

   • The device can deliver up to 3A continuously.
   • Ensure proper heat dissipation if operating at high current levels.

4. Efficiency (畏):

   • The efficiency is typically 89% when the input voltage is 12V and the output current is 3A.
   • Efficiency may vary with different input and output conditions.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is typically 1.2V at 3A output current.
   • Ensure the input voltage is at least 1.2V higher than the output voltage to maintain regulation.

6. Quiescent Current (IQ):

   • The quiescent current is typically 4mA when the input voltage is 12V and the output current is 0A.
   • This is the current consumed by the regulator itself.

7. Shutdown Current (ISD):

   • The shutdown current is typically 0.1渭A when the shutdown pin (SHDN) is pulled low.
   • Use this feature to conserve power when the regulator is not needed.

8. Switching Frequency (fSW):

   • The switching frequency is fixed at 260kHz.
   • This helps in selecting appropriate inductors and capacitors for the circuit.

9. Thermal Shutdown Threshold (TSD):

   • The thermal shutdown threshold is 160掳C.
   • If the internal temperature exceeds this threshold, the regulator will shut down to prevent damage.

Layout Considerations

• Place the input and output capacitors as close as possible to the regulator to minimize inductance and improve transient response.
• Use a heatsink or thermal pad if operating at high currents to ensure proper heat dissipation.
• Keep the traces from the input and output capacitors to the regulator as short and wide as possible to reduce parasitic inductance.

Safety Precautions

• Ensure all connections are secure and insulated to prevent short circuits.
• Use appropriate fuses or circuit breakers to protect against overcurrent conditions.
• Do not exceed the maximum ratings specified in the parameter table to avoid damage to the device.

(For reference only)