RT9261B-50GB

RT9261B-50GB application field and working principle

RT9261B-50GB, a product of Richtek Technology Corporation, is a DC-DCswitching regulator powered by Buck or Buck Boost converter. This converterprovides a voltage-regulated output and offers protection from over-voltageor over-current. It is a highly efficient and cost-effective solution forpower system integrators.

Application Fields

Due to its wide range of features, RT9261B-50GB is applicable to manydifferent areas such as processors and system-on-chip (SoC) applications,portable product, and wide range of automotive systems. It is designed toconsume minimum power while still providing high output power. Moreover,RT9261B-50GB features excellent EMC characteristic, enable it to be usedfor low-noise performance which is suitable for networking, multimedia, andindustrial applications.

RT9261B-50GB has good noise immunity and provide safe protection foradvanced systems, thus it is ideally suitable for automotive applicationwith larger capacity and wide input voltage range, such as car cameras androad-side assistance. As such, RT9261B-50GB can guarantee a reliableperformance of the system for a long period of time.

Working Principle

RT9261B-50GB adopts a buck- or buck boost-type DC-DC converter whichcontains an internal high side and low side driver. The high side drivergenerates a terminal ramp up signal in order to trigger the low side driverso that the power switches can be switched on and off. The main componentscontained in this converter are current limit circuitry, over-voltageprotection, over-temperature protection, automatic crossover frequencycompensation, soft start circuitry, power failure detection and shutdowncircuitry.

The low side driver will provide a low side on signal, when this signal issent to the power switches, the power switches will be turned on. Then thepower switch will provide a voltage to the pass element, a feedback voltagewill be generated from the source to ground. This feedback voltage will beused as the reference voltage to regulate the DC-DC converter\'s outputvoltage. When the load increases, the feedback signal will increase accordingly.

When the load decreases, the signal will decrease and the circuit willautomatically adjust itself to maintain the output voltage in a regulatedstate. Thus, RT9261B-50GB provides high power with low watt loss, whichmakes it ideal for applications of all sizes.

Conclusion

The RT9261B-50GB DC-DC switching regulator from Richtek TechnologyCorporation is a highly efficient cost-effective solution for power systemintegrators. It is applicable to a wide range of scenarios, such as processorsand SoCs, portable products and automotive systems. RT9261B-50GB adopts abuck or buck-boost type DC-DC converter to provide a voltage-regulatedoutput and over-voltage/over-current protection. It offers a good noiseimmunity, high power efficiency and a wide input voltage range.