SC3102DULTRT

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The SC3102DULTRT is a DC/DC switching regulator module (PMIC - Voltage Regulators - DC DC Switching Regulators) which is highly efficient and small, making it a perfect solution for many applications. It features high switching frequency, low on-state resistance, and extremely low noise operation. It can be operated in a wide range of temperatures and is available in a variety of packages to fit the needs of the user.

Application Field

The SC3102DULTRT is suitable for a wide variety of applications where a highly-efficient DC/DC switching regulator is needed, such as in automotive, consumer electronics, commercial aerospace, industrial and power-conversion products. Uses include voltage conversion from 12V to 3.3V; 5V to 3.3V; 12V to 5V etc. All these applications are possible thanks to the wide operating temperature of the product (-40° to 85°C).

Working Principle

The SC3102DULTRT utilizes a Flyback-type topology that integrates a high-side MOSFET as an active switch. This circuit topology helps increase efficiency when compared to linear voltage regulators, while also reducing the power dissipations. Furthermore, the device provides thermal shutdown and cycle-by-cycle current limit protection.

The SC3102DULTRT operates in constant frequency pulse-width modulation (PWM) mode. The input voltage is compared with an internal error amp signal, and the duty cycle is adjusted so that the output voltage maintains the set value. The current limit is sensed using a sense resistor, and its value is adjustable, by changing an internal resistor, from the default 0.07 A up to 0.35 A.

Converting Efficiency

The SC3102DULTRT offers excellent efficiency while operating at both full load and light load. At full load, the efficiency is 90%, and at 10% load, it is still around 80%. It is also very important to consider its light load efficiency on the standby mode, which is 30%, and its overload protection, which is enabled by cycle-by-cycle current limit protection.

Input/Output Voltage

This module offers a wide input voltage range (below the undervoltage lockout threshold of 10 V, UP to 40 V) and adjustable output voltage from 0.8 V to 16 V . The switching frequency is adjustable from 40 kHz to 200 kHz, providing users with the flexibility of optimizing their design for frequency and noise related requirements.

Conclusion

The SC3102DULTRT is a DC/DC switching regulator intended for a wide variety of applications. Thanks to the topology, it is a compact and highly efficient solution, easily adjustable and with good protection capabilities. Input and output voltage ranges are wide, offering solutions for many applications and allowing users to adapt the frequency and output voltage as required.

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