Details

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BUY LMR14020SDDA https://www.utsource.net/itm/p/7283102.html
LMR Nano SIMPLE SWITCHER? Step-Down Regulator Series Input Voltage up to 42V (LMRx42xx), 20V (LMRx20xx), and 5.5V (LMRx05xx) Output Current up to 2A (LMRxxx20), 1.5A (LMRxxx15), 1A (LMRxxx10), etc. Adjustable output voltage from 0.6V 1MHz or greater switching frequency of 1.6MHz (LMR.....X) and 3MHz (LMR.....Y) Low Shutdown Quiescent Current Internal Soft-start Thermal Shutdown

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Input Voltage	VIN	3.0	-	42	V
Output Voltage	VOUT	-	5.0	-	V	Adjustable
Output Current	IOUT	-	2.0	2.1	A
Quiescent Current	IQ	-	65	-	μA	VIN = 12V, VOUT = 5V, IOUT = 0A
Dropout Voltage	VDROPOUT	-	800	-	mV	IOUT = 2.1A
Reference Voltage	VREF	-	1.24	-	V
PSRR at 100 kHz	PSRR	-	60	-	dB
Load Regulation	δVOUT	-	0.2	-	%	IOUT: 0mA to 2.1A
Line Regulation	δVOUT	-	0.05	-	%/V	VIN: 3V to 42V
Operating Temperature	TOPR	-40	-	125	°C	Storage Temp: -65°C to 150°C

Instructions:

1. Power Supply Connection:

   • Connect the input voltage (VIN) between the VIN pin and GND.
   • Ensure that the input voltage is within the specified range of 3V to 42V.

2. Output Configuration:

   • Set the output voltage (VOUT) by adjusting the external resistor network connected to the FB pin.
   • The output voltage can be adjusted based on the formula provided in the datasheet.

3. Capacitor Selection:

   • Use appropriate input and output capacitors as recommended in the datasheet for stability.
   • Typical values are 1μF ceramic capacitors for both input and output.

4. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high output currents or high ambient temperatures.
   • Check the thermal resistance and power dissipation ratings.

5. Protection Features:

   • The device includes overcurrent protection and thermal shutdown features.
   • Verify that these features do not activate under normal operating conditions.

6. Layout Guidelines:

   • Follow good PCB layout practices to minimize noise and improve performance.
   • Keep the paths from VIN to GND and VOUT to GND short and direct.

7. Testing:

   • After assembly, test the circuit under various load conditions to ensure it meets the design specifications.
   • Monitor temperature and efficiency during testing.

(For reference only)