Details

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BUY LM27213SQ https://www.utsource.net/itm/p/12542491.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	4.5	-	60	V
Output Voltage Range	VOUT	Adjustable	0.8	-	55	V
Output Current	IOUT	Continuous	-	3	3.5	A
Quiescent Current	IQ	VIN = 5V, VOUT = 3.3V, IOUT = 0A	-	1.5	2.5	mA
Shutdown Current	ISD	VIN = 5V, EN = 0V	-	1	2	μA
Switching Frequency	fSW	Default	-	1.1	1.1	MHz
Reference Voltage	VREF	-	0.8	0.8	0.8	V
Enable Threshold	VEN	Rising	-	1.2	1.4	V
Enable Threshold	VEN	Falling	-	0.8	1.0	V
Thermal Shutdown Temperature	TSD	-	-	160	-	°C

Instructions for Using the LM27213SQ

1. Input Voltage (VIN):

   • Ensure the input voltage is within the range of 4.5V to 60V.
   • Use appropriate input capacitors to stabilize the input voltage.

2. Output Voltage (VOUT):

   • The output voltage can be adjusted from 0.8V to 55V using external resistors.
   • Calculate the resistor values using the formula: ( V_ = V_ left(1 + fracright) ), where ( V_ = 0.8V ).

3. Output Current (IOUT):

   • The device can provide a continuous output current up to 3.5A.
   • Ensure proper heat dissipation for high output currents.

4. Quiescent Current (IQ):

   • The quiescent current is typically 1.5mA under normal operating conditions.
   • Keep this in mind for low-power applications.

5. Shutdown Current (ISD):

   • The shutdown current is very low, typically 1μA, when the enable pin (EN) is set to 0V.
   • Use this feature to save power in standby modes.

6. Switching Frequency (fSW):

   • The default switching frequency is 1.1MHz.
   • This can be adjusted using an external resistor if needed.

7. Reference Voltage (VREF):

   • The internal reference voltage is 0.8V, which is used to set the output voltage.

8. Enable Threshold (VEN):

   • The enable pin (EN) must be above 1.2V to activate the device.
   • It will turn off when the voltage drops below 0.8V.

9. Thermal Shutdown (TSD):

   • The device will shut down if the junction temperature exceeds 160°C to prevent damage.
   • Ensure adequate cooling and thermal management.

10. PCB Layout:

    • Follow recommended PCB layout guidelines to ensure optimal performance and thermal management.
    • Place input and output capacitors close to the device to minimize parasitic inductance.

11. Protection Features:

    • The device includes overcurrent protection, thermal shutdown, and undervoltage lockout to protect against various fault conditions.

By following these instructions, you can effectively use the LM27213SQ in your power supply designs.

(For reference only)