Voltage - Output (Min/Fixed):	5V
Base Part Number:	REG711-5
Supplier Device Package:	8-VSSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	1MHz
Current - Output:	50mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching Regulators

DC-DC switching regulators convert a DC input voltage to a different DC output voltage, while providing extra features. An example is the REG711EA-5/250, which is a high efficiency switched-capacitor voltage converter. This device regulates a 3.3V to 5V output voltage when operated from a 3.45V to 9V input voltage.

Input Polarity

The REG711EA-5/250 can operate with either positive or negative input polarities. This flexibility allows for additional design opportunities, since a single device can be used for multiple applications. For example, a negative output voltage can be created from a positive input voltage, allowing for high voltage isolation between input and output.

Low power consumption

The REG711EA-5/250 is a low-power, high-efficiency device. At low output currents, power consumption is typically very low, only a few milliwatts. This allows the device to dissipate little heat and helps keeps the solution cost down. The input current also remains low, even at high output voltages.

High frequency switching

The REG711EA-5/250 is a switching-mode voltage regulator, operating at a very high frequency. This frequency is usually greater than 1 MHz, which allows the output current to respond quickly to changes in the input voltage. This quick response helps avoid large voltage drops that can occur with non-switching regulators.

Adjustable output

The output voltage of the REG711EA-5/250 can be adjustable. This prevents the output voltage from becoming too low or too high and ensures that the output voltage remains within the specified range. This allows the designer to maintain an output voltage that is close to the desired setpoint.

Output voltage ripple

When operating the REG711EA-5/250, output voltage ripple can be minimized. Ripple is the fluctuations in the input and output voltages due to high frequency switching. The output voltage ripple of the REG711EA-5/250 is typically a few millivolts, which is low compared to other DC-DC switching regulators.

Applications

The REG711EA-5/250 is ideal for a variety of applications. These include power regulation for embedded systems, DC-DC conversion for portable computers, and voltage regulation for automotive applications. The device offers substantial benefits, such as high efficiency, low power consumption and no heat dissipation, making it suitable for use in all types of systems.

Working Principle

The REG711EA-5/250 is a switched-capacitor voltage converter. When a voltage is applied to the input pins, an oscillator circuit begins to oscillate and charge a pair of capacitors. These capacitors are then switched in and out of the circuit. As the capacitors charge and discharge, the output voltage is regulated. The capacitors are designed to provide a stable output voltage. During high input voltage conditions, the lower capacitor is charged to a level corresponding to the desired output voltage. During low input voltage conditions, the higher capacitor is discharged and supplies the regulated output.

Conclusion

The REG711EA-5/250 is a high efficiency switching-mode voltage regulator. It is capable of regulating output voltages from 3.3V to 5V with an input voltage ranging from 3.45V to 9V. Its low power consumption and adjustable output voltage makes it an ideal solution for a variety of applications. Its output voltage ripple is also low, providing a highly stable output voltage. It is an effective, low-cost solution for any voltage regulation needs.

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