RT9214PS

Overview

The RT9214PS is a high-efficiency synchronous buck PWM DC/DC controller designed to generate logic-supply voltages in PC-based systems. It operates with 5V or 12V supply voltage and drives low-cost N-channel MOSFETs. The device features voltage mode PWM control with a fixed 300kHz oscillator frequency, providing an optimum compromise between efficiency, external component size, and cost. It integrates internal soft-start, frequency compensation networks, and over-current fault monitoring on the MOSFET without requiring a current sense resistor.

Feature Summary

• Voltage Mode PWM Control with Fixed Frequency Oscillator
• Internal Soft-Start and Adaptive Non-Overlapping Gate Driver
• Over-Current Fault Monitor on MOSFET Without Current Sense Resistor
• Fast Transient Response via High-Speed GM Amplifier

Applications

• Graphic Cards
• Motherboards and Desktop Servers
• IA Equipment
• Telecommunication Equipment
• High Power DC/DC Regulators

Procurement Notes

Verify the specific suffix PS against the manufacturer's official datasheet to confirm package type and RoHS compliance status. Ensure compatibility with existing PCB footprints for SOP-8 packages. Confirm that the selected variant meets the required operating temperature range for the target application environment before finalizing procurement orders.

Selection Notes

Select this controller for applications requiring single-output logic supply generation in PC-based systems. It is suitable where low external component count and cost-effective N-MOSFET driving are priorities. The fixed 300kHz frequency aids in optimizing filter component sizes. Ensure the design supports the required transient response capabilities provided by the internal high-speed GM amplifier.

Part Context

The RT9214 series belongs to Richtek's portfolio of synchronous buck PWM controllers aimed at PC logic supplies. The PS suffix typically denotes a specific package configuration, often SOP-8, within this family. These devices integrate control, output adjustment, and protection functions into a single package to simplify system design and reduce board space requirements.

Replacement Considerations

Consult official cross-reference lists for direct substitutes. Verify pinout compatibility and electrical specifications if considering alternative manufacturers. No public confirmed substitute part numbers are listed in the provided documentation.