Details

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BUY LTC1474CS8-3.3 https://www.utsource.net/itm/p/12597422.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VCC	Operating	2.7	-	5.5	V
Output Voltage	VOUT	Fixed	-	3.3	-	V
Output Current	IOUT	Continuous	-	150	-	mA
Quiescent Current	IQ	No Load	-	50	-	μA
Dropout Voltage	VDROPOUT	IOUT = 150mA	-	300	-	mV
Line Regulation	ΔVOUT/ΔVIN	VIN = 2.7V to 5.5V	-	0.01	-	%/V
Load Regulation	ΔVOUT/ΔIOUT	IOUT = 0 to 150mA	-	0.01	-	%/mA
Power Good Threshold	VPG	Rising	-	2.97	-	V
Power Good Hysteresis	VHYST	-	-	100	-	mV
Shutdown Current	ISD	VIN = 5.5V	-	1	-	μA
Operating Temperature Range	TOPR	-	-40	-	125	°C
Storage Temperature Range	TSTG	-	-65	-	150	°C

Instructions for Use:

1. Supply Voltage (VCC):

   • Ensure the input voltage is within the range of 2.7V to 5.5V.
   • Use appropriate decoupling capacitors (typically 1μF ceramic) close to the VCC pin to stabilize the supply.

2. Output Voltage (VOUT):

   • The LTC1474CS8-3.3 provides a fixed output voltage of 3.3V.
   • Use a bypass capacitor (typically 10μF tantalum or ceramic) at the output to filter noise and ensure stability.

3. Output Current (IOUT):

   • The device can provide up to 150mA of continuous output current.
   • For higher current requirements, consider using a heat sink or a more powerful regulator.

4. Quiescent Current (IQ):

   • The quiescent current is typically 50μA with no load.
   • This low quiescent current makes the device suitable for battery-powered applications.

5. Dropout Voltage (VDROPOUT):

   • The dropout voltage is typically 300mV at full load (150mA).
   • Ensure that the input voltage is at least 300mV higher than the output voltage to maintain regulation.

6. Line Regulation:

   • The line regulation is 0.01% per volt, indicating excellent stability over a wide range of input voltages.

7. Load Regulation:

   • The load regulation is 0.01% per milliamp, ensuring consistent output voltage even under varying load conditions.

8. Power Good (PG) Pin:

   • The PG pin indicates when the output voltage is within the specified range.
   • The rising threshold is 2.97V with a hysteresis of 100mV.

9. Shutdown (SD) Pin:

   • The device can be shut down by pulling the SD pin low.
   • The shutdown current is typically 1μA.

10. Operating and Storage Temperature:

    • The operating temperature range is from -40°C to 125°C.
    • The storage temperature range is from -65°C to 150°C.

11. Layout Considerations:

    • Place the input and output capacitors as close as possible to the respective pins to minimize inductance and improve performance.
    • Use wide traces for power and ground connections to reduce resistance and inductance.

12. Thermal Management:

    • If operating at high currents or in high ambient temperatures, consider adding a heat sink or using a larger PCB area to dissipate heat.

13. Package Information:

    • The LTC1474CS8-3.3 is available in an 8-lead SOIC package.
    • Refer to the datasheet for detailed mechanical dimensions and mounting guidelines.

(For reference only)