Details

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BUY LP38500TS-ADJ https://www.utsource.net/itm/p/4764236.html
1.5A FlexCap Low Dropout Linear Regulator for 2.7V to 5.5V Inputs

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating	2.95	-	5.5	V
Output Voltage	VOUT	Adjustable	0.8	-	5.0	V
Quiescent Current	IQ	VOUT = 3.3V, IOUT = 0mA	-	40	-	μA
Dropout Voltage	VDROPOUT	IOUT = 100mA, VIN = 3.3V	-	250	-	mV
Load Regulation	ΔVOL/ΔIL	IOUT = 0mA to 100mA	-	2	-	mV
Line Regulation	ΔVOL/ΔVIN	VIN = 2.95V to 5.5V	-	2	-	mV
PSRR (Power Supply Rejection Ratio)	PSRR	f = 1kHz	-	70	-	dB
Temperature Range	Toper	Operating	-40	-	125	°C

Instructions for LP38500TS-ADJ:

1. Input Capacitor Selection:

   • A 1μF ceramic capacitor is recommended for stable operation.
   • Place the input capacitor as close as possible to the device's VIN and GND pins.

2. Output Capacitor Selection:

   • Use a minimum of 1μF ceramic output capacitor for stability.
   • Larger capacitors can be used to reduce output ripple.

3. Adjusting Output Voltage:

   • The output voltage can be adjusted using an external resistor network between the ADJ pin and ground.
   • Formula for setting output voltage: ( V_ = V_ times (1 + frac) )
   • Where ( V_ ) is approximately 0.8V.

4. Thermal Considerations:

   • Ensure adequate heat dissipation if operating at high current or in high ambient temperatures.
   • Keep the junction temperature within the specified range to avoid thermal shutdown.

5. PCB Layout Recommendations:

   • Maintain short and wide traces for power and ground connections.
   • Avoid routing sensitive analog signals near the power paths to minimize noise coupling.

(For reference only)