Details

---

BUY TPS81256SIPT https://www.utsource.net/itm/p/12612471.html

Parameter	Symbol	Min	Typ	Max	Unit	Notes
Input Voltage	VIN	2.7	-	5.5	V	Operating range
Output Voltage	VOUT	-	3.3	-	V	Fixed output voltage
Output Current	IOUT	-	500	-	mA	Continuous output current
Efficiency	η	-	90	-	%	Typical efficiency at nominal conditions
Quiescent Current	IQ	-	40	-	μA	Typical quiescent current
Shutdown Current	ISD	-	0.1	-	μA	Typical shutdown current
Operating Temperature Range	TOPR	-40	-	125	°C	Storage and operating temperature range
Junction Temperature	TJ	-40	-	150	°C	Maximum junction temperature
Thermal Resistance (θJA)	θJA	-	50	-	°C/W	Typical thermal resistance to ambient
Start-Up Time	tSTARTUP	-	200	-	μs	Typical start-up time from enable to full output
Dropout Voltage	VDROPOUT	-	250	-	mV	Typical dropout voltage at full load
Enable Voltage (High)	VEN(HIGH)	1.1	-	1.4	V	Minimum enable voltage for high state
Enable Voltage (Low)	VEN(LOW)	-	0.4	0.8	V	Maximum enable voltage for low state
Reverse Input Protection	VREVIN	-5	-	5	V	Maximum reverse input voltage
Output Voltage Accuracy	ΔVOUT	-1	0	1	%	Output voltage accuracy over line and load

Instructions for Use

1. Power Supply Connection:

   • Connect the input voltage (VIN) to the positive terminal of the power supply.
   • Connect the ground (GND) to the negative terminal of the power supply.

2. Output Connection:

   • Connect the output voltage (VOUT) to the load.
   • Ensure the load does not exceed the maximum output current (IOUT).

3. Enable Pin:

   • To enable the device, apply a voltage greater than VEN(HIGH) to the enable pin.
   • To disable the device, apply a voltage less than VEN(LOW) to the enable pin.

4. Thermal Management:

   • Ensure adequate heat dissipation to keep the junction temperature (TJ) within the specified range.
   • Use a heatsink if necessary, especially under high load conditions.

5. Capacitor Selection:

   • Use a ceramic capacitor with low ESR for input and output filtering.
   • Recommended values: 1 μF for input and 1 μF for output.

6. Reverse Voltage Protection:

   • The device has built-in reverse voltage protection up to VREVIN.
   • Avoid exceeding this limit to prevent damage.

7. Storage and Operating Temperature:

   • Store and operate the device within the specified temperature range (TOPR and TJ) to ensure reliable performance.

8. Start-Up Time:

   • The device will take approximately tSTARTUP to reach full output after being enabled.

9. Efficiency:

   • The typical efficiency is given at nominal conditions. Actual efficiency may vary depending on input voltage, output load, and environmental conditions.

10. Output Voltage Accuracy:

    • The output voltage will remain within ±1% of the nominal value under varying line and load conditions.

For detailed application circuits and further information, refer to the datasheet provided by the manufacturer.

(For reference only)