LSP5503L-R8A

Voltage Regulators - DC DC Switching Regulators Overview

The LSP5503L-R8A is a monolithic synchronous step-down DC-DC converter manufactured by Diodes Incorporated. It integrates high-side and low-side power MOSFETs to deliver a continuous load current of 3A. The device operates with an input voltage range from 4.5V to 27V and supports an adjustable output voltage starting from 0.925V. It utilizes a fixed switching frequency of 340kHz and employs current mode control for fast transient response. The component features programmable soft-start, cycle-by-cycle current limiting, and thermal shutdown protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side power MOSFETs for efficient synchronous rectification
• Utilizes current mode control architecture for rapid transient response
• Includes programmable soft-start functionality to limit inrush current during startup
• Provides comprehensive protection against overcurrent, short circuits, and under-voltage lockout

Voltage Regulators - DC DC Switching Regulators Applications

• Distributed power supply systems
• Network infrastructure equipment
• Power supplies for FPGA, DSP, and ASIC applications
• Portable computing devices such as laptops

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix R8A corresponds to the required tape-and-reel packaging configuration. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer. Ensure the ordering part number matches the exact electrical specifications and package type required for the design.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 27V is required alongside a 3A output capability. The fixed 340kHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the ESOP-8L package dimensions for PCB layout constraints and verify thermal management requirements for the intended operating environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LSP55xx series of synchronous buck converters designed for general-purpose power management. The series targets applications requiring compact solutions with high efficiency. The LSP5503L variant specifically addresses markets needing robust performance within a small footprint, serving as a replacement for older discrete solutions or less integrated controllers.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and electrical parameters before considering alternative manufacturers.