Details

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BUY SI9933A https://www.utsource.net/itm/p/12609749.html

Parameter	Symbol	Min	Typical	Max	Unit	Conditions
Input Voltage	V_IN	2.5	-	5.5	V
Output Voltage	V_OUT	-	1.8	-	V	Fixed
Output Current	I_OUT	-	300	-	mA	Continuous
Quiescent Current	I_Q	-	20	-	渭A	No Load
Dropout Voltage	V_DO	-	120	-	mV	I_OUT = 300mA, V_IN = 3.3V
Load Regulation	-	-	1.5	-	%	I_OUT: 0 to 300mA
Line Regulation	-	-	0.05	-	%/V	V_IN: 2.7 to 5.5V, I_OUT = 100mA
Ripple Rejection	-	-	60	-	dB	f = 1kHz, V_IN = 3.3V, I_OUT = 100mA
Operating Temperature	T_OP	-40	-	85	掳C
Storage Temperature	T_STG	-65	-	150	掳C

Instructions for Use:

1. Input Connection:

   • Connect the input voltage (V_IN) to the VIN pin.
   • Ensure the input voltage is within the specified range (2.5V to 5.5V).

2. Output Connection:

   • Connect the output load to the VOUT pin.
   • The output voltage is fixed at 1.8V.

3. Ground Connection:

   • Connect the ground (GND) pin to the common ground of the system.

4. Capacitors:

   • Place a 1渭F ceramic capacitor close to the VIN and GND pins to stabilize the input voltage.
   • Place a 1渭F ceramic capacitor close to the VOUT and GND pins to stabilize the output voltage.

5. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high output currents or in high ambient temperatures.
   • The device is designed to operate up to 85掳C, but performance may degrade at higher temperatures.

6. Power-On Sequence:

   • Apply the input voltage gradually to avoid inrush current.
   • Allow the device to stabilize before connecting the load.

7. Storage and Handling:

   • Store the device in a dry, cool place.
   • Handle with care to avoid static damage; use ESD protection when handling.

8. Testing:

   • Before final assembly, test the device under typical operating conditions to ensure it meets the required specifications.

Pin Configuration:

Pin	Name	Description
1	VIN	Input Voltage
2	GND	Ground
3	VOUT	Output Voltage

Notes:

• Always refer to the datasheet for the most accurate and detailed information.
• Ensure all connections are secure and free from shorts or open circuits.

(For reference only)