Details

---

BUY SD8666QS https://www.utsource.net/itm/p/12600153.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	V_IN	Operating	4.5	-	28	V
Output Voltage	V_OUT	Adjustable	0.8	-	18	V
Quiescent Current	I_Q	V_OUT = 5V, I_OUT = 0mA	-	30	-	μA
Dropout Voltage	V_DROPOUT	I_OUT = 500mA	-	300	-	mV
Load Regulation	ΔV_LOAD	I_OUT: 0mA to 500mA	-	0.5	-	%
Line Regulation	ΔV_LINE	V_IN: 4.5V to 28V	-	0.1	-	%
Ripple Rejection	PSRR	1kHz	-	70	-	dB
Thermal Shutdown	T_SD	-	-	160	-	°C

Instructions for SD8666QS:

1. Input Voltage (V_IN):

   • Ensure the input voltage is within the range of 4.5V to 28V.
   • Do not exceed the maximum input voltage to prevent damage.

2. Output Voltage (V_OUT):

   • The output voltage can be adjusted between 0.8V and 18V.
   • Use external resistors to set the desired output voltage according to the formula provided in the datasheet.

3. Quiescent Current (I_Q):

   • The quiescent current is typically 30μA when no load is applied.
   • This low quiescent current ensures efficient operation at light loads.

4. Dropout Voltage (V_DROPOUT):

   • The dropout voltage is typically 300mV at a load current of 500mA.
   • Keep this in mind when designing circuits to ensure sufficient headroom between input and output voltages.

5. Load and Line Regulation:

   • The device maintains good regulation with changes in load and line voltage.
   • Load regulation is typically 0.5%, and line regulation is 0.1%.

6. Ripple Rejection (PSRR):

   • The power supply rejection ratio is typically 70dB at 1kHz.
   • This helps in reducing output noise and ripple.

7. Thermal Shutdown (T_SD):

   • The device includes thermal protection which activates around 160°C.
   • Design adequate heat sinking to prevent overheating.

For detailed design considerations and application circuits, refer to the full datasheet of the SD8666QS.

(For reference only)