Details

---

BUY TL3844DR-8 https://www.utsource.net/itm/p/12532819.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	V_IN		2.5		40	V
Output Voltage	V_OUT			1.24		V
Quiescent Current	I_Q	V_IN = 5V		50		μA
Dropout Voltage	V_DROPOUT	I_OUT = 100mA, V_IN = 3.3V		300		mV
Load Regulation		1mA to 100mA		0.5		%
Line Regulation		2.7V to 5.5V		0.1		%
PSRR at 1kHz				60		dB
Operating Temperature	T_OP		-40		85	°C

Instructions for TL3844DR-8

1. Input Voltage Setup:

   • Ensure the input voltage is within the range of 2.5V to 40V.
   • Use appropriate decoupling capacitors on the input side to stabilize the supply.

2. Output Voltage Configuration:

   • The output voltage is typically set by external resistors. Refer to the datasheet for specific resistor values based on desired output voltage.

3. Quiescent Current Consideration:

   • The quiescent current is around 50μA at 5V input. Design your circuit considering this power consumption.

4. Dropout Voltage Management:

   • For optimal performance, ensure the dropout voltage does not exceed 300mV when operating at 100mA load and with an input voltage of 3.3V.

5. Load and Line Regulation:

   • Verify that the load regulation remains within 0.5% from 1mA to 100mA load currents.
   • Confirm line regulation stays within 0.1% over the input voltage range from 2.7V to 5.5V.

6. Power Supply Rejection Ratio (PSRR):

   • At 1kHz, the PSRR is approximately 60dB. This helps in filtering out noise from the power supply.

7. Operating Temperature Range:

   • Operate the device within a temperature range of -40°C to 85°C to ensure reliable performance.

8. Capacitor Selection:

   • Choose output capacitors with low ESR to improve transient response and stability.

9. Layout Considerations:

   • Maintain short leads and proper grounding practices to minimize noise and parasitic effects.

(For reference only)