Details

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BUY DP8421AV-25 https://www.utsource.net/itm/p/1701621.html
microCMOS Programmable 256k/1M/4M Dynamic RAM Controller/Drivers

Parameter	Description	Value
Part Number	Device identifier	DP8421AV-25
Function	Type of device	Low Dropout Linear Regulator
Input Voltage (Min)	Minimum input voltage required for operation	2.3V
Input Voltage (Max)	Maximum input voltage the device can handle	6.0V
Output Voltage (Fixed)	Fixed output voltage setting	3.3V
Output Current (Max)	Maximum continuous output current	250mA
Dropout Voltage (Max)	Maximum dropout voltage at full load	250mV (at 250mA)
Quiescent Current	Current consumed by the regulator when no load is applied	10渭A
Shutdown Current	Current consumed in shutdown mode	0.1渭A
Operating Temperature Range	Temperature range over which the device will operate as specified	-40掳C to +85掳C
Package Type	Type of package	SOT-23
Features	Special features of the device	Enable pin, Thermal Shutdown

Instructions:

1. Power Supply Connection: Connect the input voltage within the specified range (2.3V to 6.0V) to the VIN pin and ensure a stable power supply.
2. Output Configuration: The output voltage is fixed at 3.3V. Connect the VOUT pin directly to the load or further circuitry requiring this regulated voltage.
3. Enable Pin Operation: The enable pin can be used to turn the regulator on and off. Apply a logic high signal to enable the regulator and a logic low to disable it.
4. Thermal Considerations: Ensure adequate heat dissipation if operating near maximum load conditions to prevent overheating. The device includes thermal shutdown protection.
5. Capacitor Requirements: Place a 1渭F capacitor from VIN to GND and another 1渭F capacitor from VOUT to GND close to the device for stability.
6. Layout Guidelines: Follow standard PCB layout practices to minimize noise and parasitic effects, ensuring reliable operation of the regulator.

(For reference only)