Details

---

BUY LMR14203XMK https://www.utsource.net/itm/p/12612265.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	2.9	-	5.5	V
Output Voltage	VOUT	Adjustable	0.8	-	5.0	V
Output Current	IOUT	Continuous	-	3	-	A
Efficiency	畏	VOUT = 3.3V, IOUT = 3A	-	95	-	%
Switching Frequency	fSW	Default	-	2.1	-	MHz
Quiescent Current	IQ	VOUT = 3.3V, IOUT = 0A	-	60	-	渭A
Shutdown Current	ISD	VIN = 5V, EN = 0V	-	0.1	-	渭A
Start-Up Time	tSTART	VIN = 2.9V to 5.5V, VOUT = 3.3V	-	200	-	渭s
Thermal Shutdown	TSD	-	-	160	-	掳C
Short-Circuit Protection	SCP	Continuous	-	-	-	Active

Instructions for Using LMR14203XMK

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 2.9V to 5.5V.
   • Use appropriate decoupling capacitors to stabilize the input voltage.

2. Output Voltage (VOUT):

   • The output voltage can be adjusted from 0.8V to 5.0V using external resistors.
   • Follow the formula provided in the datasheet to calculate the resistor values.

3. Output Current (IOUT):

   • The device can provide up to 3A of continuous output current.
   • Ensure proper heat dissipation if operating at high currents.

4. Efficiency:

   • The typical efficiency is 95% at VOUT = 3.3V and IOUT = 3A.
   • Optimize the design for maximum efficiency by minimizing parasitic losses.

5. Switching Frequency (fSW):

   • The default switching frequency is 2.1MHz.
   • This can be adjusted using an external resistor if needed.

6. Quiescent Current (IQ):

   • The quiescent current is typically 60渭A when VOUT = 3.3V and IOUT = 0A.
   • Keep this in mind for low-power applications.

7. Shutdown Current (ISD):

   • The shutdown current is typically 0.1渭A when VIN = 5V and the enable pin (EN) is set to 0V.
   • Use the enable pin to control the power state of the device.

8. Start-Up Time (tSTART):

   • The start-up time is typically 200渭s when VIN transitions from 2.9V to 5.5V and VOUT is set to 3.3V.
   • Ensure the load is stable during this period.

9. Thermal Shutdown (TSD):

   • The device will shut down if the junction temperature exceeds 160掳C.
   • Implement adequate cooling solutions to prevent thermal shutdown.

10. Short-Circuit Protection (SCP):

    • The device has built-in short-circuit protection.
    • In case of a short circuit, the device will automatically limit the output current and attempt to recover.

For detailed application notes and further information, refer to the official datasheet of the LMR14203XMK.

(For reference only)