Details

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BUY TPS79850QDGNRQ1 https://www.utsource.net/itm/p/5325253.html
50 mA, 3 V TO 50 V, MICROPOWER, LOW-DROPOUT LINEAR REGULATOR

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous Operating Range	2.9	-	5.5	V
Output Voltage	VOUT	Fixed Output Voltage	-	3.3	-	V
Dropout Voltage	VDROPOUT	IOUT = 100mA	-	220	-	mV
Quiescent Current	IQ	VIN = 3.6V, VOUT = 3.3V	-	48	-	μA
Shutdown Current	ISD	VIN = 3.6V, SHDN = L	-	0.1	-	μA
Load Regulation	ΔVOUT	IOUT = 0mA to 100mA	-	0.5	-	%
Line Regulation	ΔVOUT	VIN = 2.9V to 5.5V	-	0.2	-	%
PSRR at 1kHz	PSRR	-	-	70	-	dB
Transient Response	ΔVOUT	IOUT step from 0mA to 100mA	-	10	-	mV

Instructions for TPS79850QDGNRQ1:

1. Power Supply Connection:

   • Connect the input voltage (VIN) between 2.9V and 5.5V.
   • Ensure the output voltage (VOUT) is set to the fixed output of 3.3V.

2. Grounding:

   • Properly connect the ground (GND) pin to the system ground to ensure stable operation.

3. Capacitor Selection:

   • Use a 1μF ceramic capacitor on both the input and output for stability. Place these capacitors as close as possible to the device.

4. Shutdown Function:

   • To place the device in shutdown mode, pull the SHDN pin low. This reduces the current consumption to approximately 0.1μA.

5. Thermal Considerations:

   • Ensure adequate heat dissipation if operating near the maximum input voltage and load current conditions.

6. Output Ripple and Noise Reduction:

   • The device has a built-in noise reduction feature; however, additional filtering may be required depending on the application's sensitivity to noise.

7. Transient Response:

   • The regulator can handle transient loads with minimal output voltage deviation, typically within 10mV for a load step from 0mA to 100mA.

8. PCB Layout:

   • Follow recommended PCB layout guidelines to minimize parasitic inductances and ensure optimal performance.

For detailed specifications and more comprehensive instructions, refer to the official datasheet provided by Texas Instruments.

(For reference only)