Details

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BUY LM3409HVMYX/NOPB https://www.utsource.net/itm/p/12605924.html

Parameter	Symbol	Test Conditions	Min	Typ	Max	Unit
Input Voltage	VIN		5.5		60	V
Output Voltage	VOUT			3.3		V
Switching Frequency	fSW		200	700	1000	kHz
Peak Inductor Current Limit	ILIM	VIN = 12V, VOUT = 3.3V		1.9		A
Soft-Start Time	tSS			4		ms
Enable Threshold (High)	VEN(H)	Rising		1.23		V
Enable Threshold (Low)	VEN(L)	Falling		0.8		V
UVLO Threshold (Typical)	VUVLO			3.2		V
Thermal Shutdown Temp	TSD			160		°C

Instructions for LM3409HVMYX/NOPB:

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 5.5V to 60V. Exceeding this range can damage the device.

2. Output Voltage (VOUT):

   • The typical output voltage is set at 3.3V. Adjust external components if a different output voltage is required.

3. Switching Frequency (fSW):

   • Set the switching frequency between 200kHz and 1000kHz using an external resistor. Higher frequencies reduce the size of external components but increase switching losses.

4. Peak Inductor Current Limit (ILIM):

   • Monitor the peak inductor current limit, typically set at 1.9A, to prevent overcurrent conditions that could lead to component failure.

5. Soft-Start Time (tSS):

   • The soft-start time is typically 4ms. This feature gradually increases the output voltage to prevent inrush currents during startup.

6. Enable Control:

   • Use the enable pin to control the operation of the regulator. The enable threshold is 1.23V rising and 0.8V falling.

7. Under-Voltage Lockout (UVLO):

   • The UVLO feature ensures the regulator remains off until the input voltage exceeds the typical threshold of 3.2V.

8. Thermal Shutdown:

   • The regulator will automatically shut down if the junction temperature exceeds approximately 160°C to protect against overheating.

For detailed design considerations and specific application circuits, refer to the datasheet provided by the manufacturer.

(For reference only)