Details

---

BUY MC34115P https://www.utsource.net/itm/p/6571741.html
 

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	V_IN	-	2.7	-	5.5	V
Output Voltage	V_OUT	-	1.23	-	4.095	V
Output Current	I_OUT	V_OUT = 3.3V, Ta = 25°C	-	150	-	mA
Quiescent Current	I_Q	V_IN = 5V, V_OUT = 3.3V	-	1.8	-	mA
Dropout Voltage	V_DROPOUT	I_OUT = 100mA, V_OUT = 3.3V	-	0.3	-	V
Load Regulation	δV_LOAD	I_OUT: 0 to 150mA	-	0.5	-	%
Line Regulation	δV_LINE	V_IN: 2.7V to 5.5V	-	0.1	-	%
PSRR (Power Supply Rejection Ratio)	PSRR	f = 1kHz, I_OUT = 10mA	-	60	-	dB
Operating Junction Temperature	T_J	-	-40	-	125	°C

Instructions for MC34115P

1. Input Voltage Range: Ensure the input voltage is within the specified range of 2.7V to 5.5V. Voltages outside this range can damage the device or cause malfunction.

2. Output Voltage Setting: The output voltage can be adjusted from 1.23V to 4.095V using external resistors. Refer to the datasheet for specific resistor values.

3. Thermal Considerations: Keep the operating junction temperature between -40°C and 125°C. Use appropriate heatsinking if necessary, especially under high load conditions.

4. Quiescent Current: The quiescent current is typically 1.8mA at a 5V input and 3.3V output. Design your circuit considering this value for power budgeting.

5. Load Regulation: For optimal performance, ensure that the load regulation does not exceed 0.5%. This helps maintain stable output voltage over varying load conditions.

6. Line Regulation: Maintain line regulation within 0.1% by keeping the input voltage stable. This ensures minimal changes in output voltage due to variations in input voltage.

7. PSRR (Power Supply Rejection Ratio): The device offers a typical PSRR of 60dB at 1kHz. This characteristic helps in reducing noise from the input supply.

8. Dropout Voltage: Operate with a dropout voltage of 0.3V at an output current of 100mA. Lower dropout voltages allow the regulator to operate closer to the input voltage.

9. Capacitor Selection: Choose suitable input and output capacitors as recommended in the datasheet to stabilize the regulator and reduce ripple.

10. PCB Layout: Pay attention to PCB layout guidelines provided in the datasheet to minimize noise and improve thermal performance.

(For reference only)