Details

---

BUY AZ431AN-B https://www.utsource.net/itm/p/11279462.html
AZ431AN-B Voltage Reference Power Management IC 2.5V~18V SOT-23 marking N44 Adjustable Precision shunt regulator

Parameter	Symbol	Min	Typ	Max	Unit	Description
Operating Voltage	Vref	2.45	2.5	2.55	V	Reference voltage
Operating Current	Iadj	0.4		1.0	mA	Adjustment current
Output Current	Iout	0.1		150	mA	Maximum output current
Dropout Voltage	Vdo		0.7	1.3	V	Dropout voltage at Iout = 150 mA
Power Dissipation	Ptot			1.25	W	Total power dissipation
Operating Temperature	Topr	-40		125	掳C	Operating temperature range
Storage Temperature	Tstg	-65		150	掳C	Storage temperature range
Thermal Resistance	Rth		180		掳C/W	Junction-to-ambient thermal resistance
Capacitance	Cadj		1.0		渭F	Recommended adjustment capacitor value

Instructions for Use:

1. Circuit Connection:

   • Connect the reference pin (REF) to the output pin (OUT) through a resistor (R1).
   • Connect the output pin (OUT) to the load.
   • Connect the cathode of a capacitor (Cadj) between the REF and GND pins.

2. Adjustment Resistor Calculation:

   • The output voltage (Vout) can be adjusted using the formula: Vout = Vref * (1 + R2/R1) + Iadj * R2
   • Where:
     • Vref is the reference voltage (2.5V).
     • R1 is the resistor connected between OUT and REF.
     • R2 is the resistor connected between REF and GND.
     • Iadj is the adjustment current (typically 0.4 to 1.0 mA).

3. Capacitor Selection:

   • Use a 1 渭F capacitor (Cadj) between the REF and GND pins to ensure stability.
   • For better transient response, a small ceramic capacitor (e.g., 0.1 渭F) can be added between OUT and GND.

4. Thermal Management:

   • Ensure adequate heat sinking if operating at high currents or in high ambient temperatures to prevent overheating.
   • The maximum junction temperature should not exceed 150掳C.

5. Operating Conditions:

   • Ensure the input voltage is at least 0.7V to 1.3V higher than the desired output voltage to maintain regulation.
   • Operate within the specified temperature range to avoid damage and ensure reliable performance.

6. Storage and Handling:

   • Store in a dry, cool place away from direct sunlight.
   • Handle with care to avoid static discharge, which can damage the component.

(For reference only)