Measure Output Voltage LDO Regulator in SIMtrix

Measure Output Voltage LDO Regulator

1. Output Voltage

Fig 1. LDO model packet and test circuit for output voltage

Objective 

To see the actual value of output voltage Vout(E) compared to the set output voltage Vout(S).

• Vout(E) is actual output voltage 
• Vout(S) is set output voltage

 

Condition

• Vout(S) = 2.5V
• Vin >= Vout(S) + 2V = 2.5 + 2 =4.5V
• Iout = 30mA

Then R load (R4) = Vout(S)/Iout = 2.5/30mA = 2.5/0.03 = 83.33 ohm

Procedure

Sweet input voltage V2 from 0V to 12V and probe output voltage (R4).

Fig 2. Choose analysis voltage

Result

Fig 3. Graph of output voltage

While input voltage (V2) = 4.5V then output voltage Vout(E) = 2.5077