Details

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BUY STMPS2151STR https://www.utsource.net/itm/p/12359959.html

Parameter	Symbol	Min	Typ	Max	Unit	Conditions
Input Voltage	VIN	1.8	-	5.5	V	-
Output Voltage	VOUT	1.8	-	5.0	V	Adjustable via external resistors
Output Current	IOUT	-	1.5	2.0	A	Continuous
Quiescent Current	IQ	30	-	60	μA	No load, VIN = 5V
Shutdown Current	ISD	0.1	-	1.0	μA	VIN = 5V, EN = 0V
Efficiency	η	-	94	-	%	VIN = 5V, VOUT = 3.3V, IOUT = 1A
Switching Frequency	fSW	2.1	-	2.1	MHz	Fixed
Dropout Voltage	VDROPOUT	-	100	150	mV	IOUT = 1A, VIN = VOUT + VDROPOUT
Load Regulation	ΔVOUT/ΔIOUT	-	1	-	mV/A	VIN = 5V, VOUT = 3.3V, IOUT from 0 to 1A
Line Regulation	ΔVOUT/ΔVIN	-	0.1	-	%/V	IOUT = 1A, VIN from 2.7 to 5.5V
Thermal Shutdown Temperature	TSD	160	-	-	°C	-
Operating Temperature Range	TOPR	-40	-	125	°C	-
Storage Temperature Range	TSTG	-65	-	150	°C	-

Instructions for STMPS2151STR

1. Power Supply Connection:

   • Connect the input voltage (VIN) to the power supply.
   • Ensure the input voltage is within the range of 1.8V to 5.5V.

2. Output Voltage Setting:

   • The output voltage (VOUT) can be adjusted using external resistors (R1 and R2).
   • Use the formula: ( V_ = 1.23 left(1 + fracright) ).

3. Enable Pin (EN):

   • The enable pin (EN) controls the operation of the device.
   • Apply a high signal (≥1.2V) to enable the device.
   • Apply a low signal (≤0.4V) to shut down the device.

4. Capacitors:

   • Connect an input capacitor (CIN) between VIN and GND, typically 10μF or higher.
   • Connect an output capacitor (COUT) between VOUT and GND, typically 10μF or higher.

5. Inductor Selection:

   • Choose an inductor with a value that matches the switching frequency and output current requirements.
   • A typical inductor value is 2.2μH.

6. Thermal Considerations:

   • Ensure proper heat dissipation by providing adequate PCB copper area or a heatsink if necessary.
   • Monitor the operating temperature to avoid exceeding the thermal shutdown temperature (160°C).

7. PCB Layout:

   • Place the components close to the IC to minimize parasitic inductance and improve performance.
   • Use wide and short traces for power connections to reduce resistance and inductance.

8. Testing:

   • Verify the output voltage and current under various load conditions.
   • Check the efficiency and thermal performance during operation.

By following these instructions, you can ensure optimal performance and reliability of the STMPS2151STR.

(For reference only)