S-8333AACB-T8T1G

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The S-8333AACB-T8T1G is a DC-DC switching controller in the power management IC (PMIC) family of voltage regulators. It provides a low noise, highly efficient, and low cost solution in resolving the varying power requirements found in today’s modern electronic products. It utilizes a wide input voltage range of 3.0V to 18.0V, while it also provides an adjustable output voltage of 0.6V to 5.5V with a maximum output current of 2A.

Features

• Wide input voltage range (3.0V to 18.0V)
• High efficiency switch mode power supply
• Adjustable output voltage (0.6V to 5.5V) with 2A maximum output current
• Low noise operation
• High 1MHz switching frequency
• Built-in protection against under-voltage, over-current and short circuit
• Shut down output capability control

Application Field

The S-8333AACB-T8T1G is ideally suited for applications that require adjustable voltages with a wide input voltage range. Some of the typical application fields of this DC-DC switching controller are as follows:

• Computer peripheral and laboratory equipment
• Battery operated and low voltage power systems
• Point of load power supplies
• Mobile and embedded system applications
• High efficiency wireless base station power supplies

Working Principle

DC-DC switching regulator controllers use pulse width modulation (PWM) for controlling the output voltage. In the S-8333AACB-T8T1G, the feedback network determines the output voltage polarity by comparing the feedback voltage to an internal reference voltage. An internal regulator feeds the PWM comparator inputs and a voltage divider external to the converter provides the output voltage feedback.

The PWM comparator compares the feedback voltage to the set point held by the internal regulator and the controller will constantly change the duty cycle of the signals controlling the MOSFETs so the output voltage is regulated to the desired level. It is also able to monitor the current running through the ground pin to detect any over-current or short-circuit conditions, and can shut down the output in order to protect the power circuitry.

Conclusion

The S-8333AACB-T8T1G is an versatile DC-DC switching controller that adds a efficient, low noise and low cost option to the family of voltage regulators. With its high frequency and wide range of available voltages, it is well-suited for many mobile and embedded applications from computer peripherals, laboratory equipment, and to high efficiency wireless base station power supplies.

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