Details

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BUY LM5575MH/NOPB https://www.utsource.net/itm/p/6082843.html
IC REG BUCK ADJ 1.5A 16HTSSOP

Parameter	Symbol	Test Conditions	Min	Typ	Max	Unit
Input Voltage Range	V_IN		3.0		42.0	V
Output Voltage Range	V_OUT		0.8		37.5	V
Switching Frequency	f_SW			100	1000	kHz
Efficiency	畏			92		%
Quiescent Current	I_Q			60		渭A
Load Regulation		10% to 100% load		0.1		%
Line Regulation		9V to 36V input		0.05		%
Start-Up Time	t_SU	From VIN = 0V to 10V		20		ms
Short-Circuit Current Limit	I_SC			1.2		A

Instructions for LM5575MH/NOPB

1. Input Voltage Setup:

   • Ensure the input voltage is within the range of 3.0V to 42.0V.
   • Use appropriate filtering capacitors at the input to minimize noise and ripple.

2. Output Voltage Configuration:

   • Set the output voltage using feedback resistors according to the formula provided in the datasheet.
   • Verify the output voltage with a multimeter after setup.

3. Switching Frequency Adjustment:

   • The switching frequency can be adjusted using an external resistor connected to the RT pin.
   • Choose the resistor value based on the desired switching frequency between 100kHz and 1000kHz.

4. Efficiency Considerations:

   • For optimal efficiency, operate within the recommended load and input voltage ranges.
   • Use low ESR (Equivalent Series Resistance) capacitors and inductors to reduce losses.

5. Thermal Management:

   • Ensure adequate heat dissipation, especially under high load conditions.
   • Place the device away from other heat-generating components or use a heatsink if necessary.

6. Protection Features:

   • The device includes internal protection against short circuits and thermal overload.
   • Do not rely solely on these protections; design the circuit to prevent faults where possible.

7. Start-Up Procedure:

   • Power up the circuit slowly to avoid inrush currents.
   • Monitor the start-up time, which should typically be around 20ms.

8. Component Selection:

   • Choose external components (capacitors, inductors, diodes) that are rated for the expected voltages and currents.
   • Pay attention to the ripple current ratings of the capacitors.

9. Layout Guidelines:

   • Follow good PCB layout practices to minimize parasitic effects.
   • Keep power traces wide and short to reduce resistance and inductance.

For detailed specifications and more advanced configurations, refer to the official datasheet provided by the manufacturer.

(For reference only)