REF5050MDREP Integrated Circuits (ICs)

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PMIC - Voltage Reference is an important component in electronic systems. It provides a stable reference voltage over a wide range of temperature and voltage conditions. The REF5050 MDREP is a programmable current sense voltage reference designed to provide an accurately regulated output voltage. It is suitable for a wide range of applications, including medical and industrial systems.

Features:

• Accurate output voltage without external trimming
• Wide operating temperature range (-40°C to +125°C)
• Wide voltage range (2.5V to 18V)
• Programmable output voltage range (1.05V to 16V)
• Low power dissipation (2.2mW)
• Small footprint (2.2 mm x 3.2 mm)

Application fields:

• Medical imaging equipment
• Automotive system
• AC/DC power adapter
• Battery charger
• Industrial equipment
• Portable electronics

The REF5050 MDREP allows for a wide range of output voltages to be programmed into the device. It is capable of programming an output voltage range between 1.05 and 16V. The device is specifically designed to provide an accurate and stable output voltage over a wide temperature range of -40°C to +125°C. The product provides two maximum power dissipation options, one with a maximum power dissipation of 2.2mW, and the other with a maximum power dissipation of 6mW.

Working principle:

The REF5050 MDREP voltage reference is based on a bandgap architecture, which uses a temperature-stable voltage reference and feedback circuitry to regulate the output voltage. The output voltage is determined by the reference voltage, feedback divider and the gain of the amplifier. The gain of the amplifier is set by an external resistor, which is connected between the AMP0 and AMP1 pins. The output voltage is regulated by an internal error amplifier, which provides a feedback loop to keep the output voltage at the desired level.

The reference voltage is generated by a bandgap reference, which is a temperature-stable circuit based on a two-diode difference circuit. It uses the temperature dependence of the forward voltage drop of the diodes to generate a temperature-independent reference voltage. The reference voltage is then compared to the feedback voltage through an error amplifier. When the feedback voltage is higher than the reference voltage, the error amplifier reduces the amplifier gain, which results in a decrease in the output voltage. Conversely, when the feedback voltage is lower than the reference voltage, the error amplifier increases the amplifier gain, resulting in an increase in the output voltage.

The REF5050 MDREP also includes an internal current sense circuit, which allows for a higher accuracy output voltage by compensating for output voltage differences due to changes in load current. The current sense circuit monitors the output current, and adjusts the output voltage accordingly. The current sense circuit also provides a current limit, to protect the device from high current loads.

In addition, the REF5050 MDREP includes an internal temperature compensation circuit. The temperature compensation circuit monitors the temperature of the device, and adjusts the reference voltage accordingly, to ensure that the output voltage remains accurate over a wide temperature range.

The REF5050 MDREP is a highly integrated voltage reference designed to provide an accurately regulated output voltage over a wide range of temperatures and voltages. It is suitable for a wide range of applications, and is particularly well-suited for medical and industrial systems.

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