AP3581BMPTR-G1

Overview

The AP3581BMPTR-G1 is a synchronous buck switching controller manufactured by Diodes Incorporated. It operates with an input voltage range of 4.5V to 13.2V and features a fixed switching frequency of 300kHz. The device supports a maximum duty cycle of 80% and includes clock synchronization capabilities. It utilizes phase control for precise timing management and offers enable functionality for power management. The component is housed in an 8-PSOP package with a裸露焊pad (exposed pad) design, measuring 0.154 inches (3.90mm) in width. It is rated for operation within a temperature range of -40°C to 85°C.

Feature Summary

• Synchronous buck topology with integrated high-side and low-side driver outputs
• Fixed 300kHz oscillator frequency for consistent switching performance
• Phase control feature enabling multi-phase parallel operation
• Clock synchronization input for external frequency alignment

Applications

• Point-of-load regulation in industrial equipment
• Power distribution systems for embedded controllers
• Voltage step-down stages in communication infrastructure

Procurement Notes

Verify the specific suffix 'G1' against the manufacturer's current product lifecycle status, as legacy components may have limited availability or require obsolescence management planning. Confirm that the 8-PSOP package variant matches the intended PCB footprint, particularly regarding the exposed thermal pad dimensions. Ensure compliance with RoHS3 standards if required by the final assembly specifications. Cross-reference the lead time requirements with the distributor's stock status, as end-of-life notices may impact supply continuity.

Selection Notes

Select this controller when a synchronous buck solution with phase-shift capability is required for higher current applications. The 300kHz frequency balances efficiency and component size effectively. Consider the 4.5V minimum input voltage constraint against the system's rail stability. The exposed pad package necessitates adequate thermal relief on the PCB layout. Verify that the 80% maximum duty cycle aligns with the lowest expected input-to-output voltage ratio to maintain regulation margins.

Part Context

This part belongs to the AP3581 series of single-phase synchronous buck PWM controllers from Diodes Incorporated. It is designed for medium-power applications requiring efficient voltage conversion. The series typically shares architectural similarities with other members like the AP3585, differing primarily in switching frequency and specific control features. The MPTR-G1 designation indicates a tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.