Details

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BUY SI9138LG https://www.utsource.net/itm/p/12594176.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Input Voltage	V_IN	4.5	-	18	V	Operating input voltage range
Output Voltage	V_OUT	-	5	-	V	Fixed output voltage
Quiescent Current	I_Q	-	20	-	渭A	Quiescent current at no load
Dropout Voltage	V_DROPOUT	-	230	-	mV	Typical dropout voltage at full load
Load Regulation	-	-	0.5	-	%	Load regulation from 0 to 300mA
Line Regulation	-	-	0.05	-	%/V	Line regulation
Ripple Rejection	-	-	60	-	dB	Power supply rejection ratio at 120Hz
Operating Junction Temp.	T_J	-40	-	125	掳C	Operating junction temperature range
Storage Temperature	T_STG	-65	-	150	掳C	Storage temperature range

Instructions for SI9138LG:

1. Input Voltage Connection:

   • Connect the input voltage (V_IN) within the range of 4.5V to 18V to the VIN pin.

2. Output Voltage Configuration:

   • The SI9138LG provides a fixed output voltage of 5V. Ensure that your circuit is designed to handle this output voltage.

3. Ground Connection:

   • Ensure a solid ground connection between the GND pin and the system ground to maintain stable operation.

4. Capacitors:

   • Place a 1渭F ceramic capacitor close to the input pin (VIN) and another 1渭F ceramic capacitor close to the output pin (VOUT) for stability and noise reduction.

5. Thermal Consideration:

   • Keep the operating junction temperature within -40掳C to 125掳C. Provide adequate heat sinking if necessary, especially under high load conditions.

6. Load Regulation:

   • Monitor the load regulation, which should be within 0.5% from no load to full load, ensuring consistent output voltage.

7. Line Regulation:

   • Verify line regulation, which should be within 0.05%/V, to ensure minimal changes in output voltage with varying input voltage.

8. Storage Conditions:

   • Store the device in an environment where the temperature does not exceed -65掳C to 150掳C.

9. Ripple Rejection:

   • The device offers a typical ripple rejection of 60dB at 120Hz, helping to filter out power supply noise.

10. Quiescent Current:

    • The quiescent current is typically 20渭A, making it suitable for low-power applications.

(For reference only)