RT7263BZQW

Voltage Regulators - DC DC Switching Regulators Overview

The RT7263BZQW is a synchronous step-down regulator manufactured by Richtek Technology Corporation. It integrates internal power MOSFETs to deliver 3A of continuous output current across a wide input voltage range of 4.5V to 21V. The device supports adjustable output voltages from 0.808V to 15V and operates at a fixed switching frequency of 500kHz, with provision for external clock synchronization between 300kHz and 2MHz. Internal compensation minimizes the requirement for external components. Protection features include cycle-by-cycle over-current limiting and thermal shutdown, while an adjustable soft-start function reduces input source stress during startup.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous buck topology with integrated high-side and low-side power MOSFETs
• Internal compensation circuitry designed to minimize external component count
• Cycle-by-cycle current limiting and thermal shutdown protection mechanisms
• Adjustable soft-start capability to manage inrush current during initialization

Voltage Regulators - DC DC Switching Regulators Applications

• Distributive power systems requiring compact DC-DC conversion
• Battery charger circuits utilizing efficient step-down regulation
• DSL modems and communication equipment power supplies
• Pre-regulator stages for downstream linear regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix ZQW against official manufacturer documentation to confirm package type and lead plating specifications. Ensure compatibility with IPC/JEDEC J-STD-020 moisture sensitivity levels for SnPb or Pb-free soldering processes. Cross-reference ordering information to distinguish between WDFN-14L and SOP-8 variants if applicable. Confirm RoHS compliance status and halogen-free requirements prior to procurement integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications demanding high efficiency within a small footprint due to integrated power switches. Consider the 500kHz fixed frequency for balancing size and performance, or utilize external clock sync for noise management. Evaluate the 3A output capability against peak load requirements. Verify that the 4.5V minimum input voltage aligns with the system's supply rails and that the 21V maximum rating accommodates transient spikes.

Voltage Regulators - DC DC Switching Regulators Part Context

The RT7263 series represents Richtek's synchronous step-down converter family designed for space-constrained applications. The RT7263BZQW variant specifically utilizes the WDFN-14L 4x3 package, offering enhanced thermal dissipation compared to standard plastic packages. This series emphasizes ease of design implementation through internal compensation and minimal external part counts, targeting portable electronics and industrial control systems.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Direct replacements require matching electrical parameters such as input voltage range, output current capacity, and switching frequency. Package compatibility must be verified when considering alternative manufacturers' devices.