A8450KLBTR

Voltage Regulators - Linear + Switching Overview

The A8450KLBTR is a quad output power management integrated circuit from Allegro MicroSystems, housed in a 24-SOIC package. It integrates one buck converter and four low-dropout linear regulators (LDOs). The device operates with a supply voltage range of 6V to 45V and supports an operating temperature range of -40°C to 135°C. Output configurations include fixed 3.3V and 5V LDOs at 200mA, a programmable LDO ranging from 1.2V to 3.3V at 200mA, and a buck output rated at 3.3V and 200mA. The component features internal sequencing logic for controlled power-up sequences.

Voltage Regulators - Linear + Switching Feature Summary

• Integrates one switching buck regulator and four independent linear regulators within a single package
• Includes internal sequencing logic to manage the activation order of multiple power rails
• Supports wide input voltage ranges suitable for automotive and industrial bus architectures
• Provides thermal protection and under-voltage lockout mechanisms for system reliability

Voltage Regulators - Linear + Switching Applications

• Automotive infotainment systems requiring multiple regulated voltage domains
• Industrial control modules needing isolated or sequenced power supplies
• Embedded computing platforms utilizing mixed buck and LDO topologies
• Telecommunications equipment requiring high-temperature stable regulation

Voltage Regulators - Linear + Switching Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging versus tube variants like 'KLB'. Confirm RoHS compliance status as datasheets may vary by revision; some sources indicate RoHS3 compliance for the TR variant while others note non-compliance for older batches. Check lead times and availability as this part number may be subject to obsolescence notices or lifecycle changes. Ensure the ordering part number matches the exact pinout and thermal pad configuration required for the PCB layout.

Voltage Regulators - Linear + Switching Selection Notes

Select this component when a design requires a combination of efficient buck conversion and precise LDO regulation for noise-sensitive loads. The integrated sequencing feature simplifies board design by eliminating external timing components typically needed for multi-rail power-up sequences. Consider the 24-SOIC package size and thermal dissipation requirements relative to the total output current load. Verify that the input voltage range aligns with the system's maximum bus voltage to ensure safe operation without overvoltage damage.

Voltage Regulators - Linear + Switching Part Context

The A8450 belongs to Allegro's family of multi-output PMICs designed for complex power distribution networks. It consolidates multiple discrete regulator functions into a single solution, reducing component count and board space. The KLBTR suffix denotes the specific packaging and reel configuration for automated assembly processes. This series is engineered for environments demanding high reliability and wide temperature operation.

Voltage Regulators - Linear + Switching Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official Allegro MicroSystems channels for current equivalent recommendations or next-source alternatives if this specific part number is discontinued or unavailable.