Details

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BUY LM5576 https://www.utsource.net/itm/p/12605965.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating	4.5	-	60	V
Output Voltage	VOUT	Adjustable	1.23	-	60	V
Output Current	IOUT	Continuous	-	3	5	A
Switching Frequency	fSW	Typical	-	500	-	kHz
Quiescent Current	IQ	VIN = 12V, no load	-	70	-	渭A
Dropout Voltage	VDROPOUT	IOUT = 3A	-	0.8	-	V
Reference Voltage	VREF	Room Temp	-	1.23	-	V
PSRR		@ 1kHz	-	70	-	dB
Temperature Range		Operating	-40	-	125	掳C

Instructions for Use:

1. Power Supply Connection:

   • Connect the input voltage (VIN) between the VIN pin and GND. Ensure that the input voltage is within the operating range of 4.5V to 60V.

2. Output Configuration:

   • For adjustable output voltage, connect an external resistor divider between VOUT, FB, and GND. The output voltage can be set using the formula ( V_ = 1.23 times (1 + frac) ).

3. Inductor Selection:

   • Choose an inductor value based on the desired switching frequency and output current requirements. Typically, a higher inductance reduces ripple but increases response time.

4. Capacitor Selection:

   • Select input and output capacitors carefully. Input capacitors should have low ESR to handle transient currents, while output capacitors stabilize the output voltage.

5. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high currents or temperatures. The device can operate up to 125掳C, but efficiency and reliability improve with better thermal management.

6. Protection Circuits:

   • Implement necessary protection circuits such as overcurrent protection, short-circuit protection, and thermal shutdown to safeguard the LM5576 and connected components.

7. Layout Recommendations:

   • Keep power paths short and direct to minimize noise and parasitic effects. Place bypass capacitors close to the IC for stability.

8. Testing:

   • After assembly, test the circuit under various conditions including startup, steady-state operation, and transient loads to ensure proper functionality.

Note: Always refer to the latest datasheet from the manufacturer for detailed specifications and application notes.

(For reference only)