LM236D-2-5

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PMIC - Voltage Reference

The LM236D-2-5 is a widely used PMIC from Texas Instruments, referenced as an adjustable voltage reference. Its main purpose and application is for precision voltage regulation, temperature compensated reference and provide a stable power output from linear voltage regulator. It has a wide input operating voltage limit range from 5V to 36V and it can operate over a temperature range from -40°C to 125°C.

Technical Specifications of LM236D-2-5

• Wide Operating Input Voltage Range: 5V to 36V;
• Typical Output Voltage: 5V±1.7%;
• Operating Temperature Range: -40°C to 125°C;
• Resistor Programmed Versatility;
• External Adjustable Voltage;
• Low Quiescent Current: 150mA;
• Output Current: 200mA;
• Low Noise.

Working Principle of LM236D-2-5

The LM236D-2-5 voltage reference IC is built with a differential amplifier. It uses a combination of resistors and capacitors to set the output voltage to a specific level. The differential amplifier is used for sensing and comparison of various reference voltages. The output of the amplifier is passed to the control circuit which is activated only if there is a voltage difference between the reference voltage and the amplifier output. This voltage difference is used as a control signal to adjust the output voltage. An adjustable voltage regulator is used to sense and control the output voltage. If the voltage level increases too much, the circuit activates the current mirror and reduces the output current, thus maintaining the output voltage level.

The LM236D-2-5 has two sets of external pins for setting the reference voltage level. The Pin 5 is for setting the constant voltage and Pin 6 is for setting the output current limit. The voltage at Pin 5 is proportional to the output voltage, and the current at Pin 6 is proportional to the output current. The resistor values are selected according to the number of output voltages required by the application. An external diode is also used to control the output voltage and current limit.

The LM236D-2-5 is well-suited for applications requiring precise voltage regulation, such as power supplies, battery chargers, and voltage reference circuits. It can also be used in combination with an adjustable voltage regulator to generate an adjustable power supply. The LM236D-2-5 has a wide input operating voltage range, making it suitable for use with a wide range of power supplies.

Conclusion

The LM236D-2-5 from Texas Instruments is a PMIC voltage reference IC used for precision voltage regulation, temperature compensated reference and stable power output from linear voltage regulator circuits. It has a wide input operating voltage limit range from 5V to 36V and it can operate over a temperature range from -40°C to 125°C. It is well-suited for precision voltage regulation applications such as power supplies, battery chargers and voltage reference circuits.

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