MAX6474TA28BD3+T

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The MAX6474TA28BD3+T is a low-dropout linear regulator with an integrated microprocessor reset circuit. It delivers up to 300mA of load current and operates within an input voltage range of +2.5V to +5.5V. The device provides a fixed output voltage of +2.8V with ±2.0% accuracy over the operating temperature range of -40°C to +85°C. It features a manual reset input, push-pull or open-drain active-low reset outputs, and four selectable timeout periods. Supply current is typically 82µA, reducing to 0.1µA in shutdown mode.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated microprocessor reset circuit monitors regulator output for brownout conditions
• Manual reset input allows assertion of reset while output remains within specification
• Dual-mode operation supports preset fixed voltages or adjustable output via external resistors
• Reverse leakage protection prevents back-feeding when output exceeds input voltage

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery-powered portable equipment
• Microprocessor supply monitoring
• Handheld instruments and PDAs
• PCMCIA cards and USB devices

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix BD3 corresponds to the required reset timeout delay period before ordering. Confirm that the TA package designation matches the intended TDFN footprint for your PCB layout. Ensure the +T suffix indicates lead-free/RoHS compliance as specified in the manufacturer's ordering guide. Cross-reference the electrical characteristics table to validate threshold tolerances against system requirements.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 2.8V output is required alongside manual reset capabilities. The integrated supervisor eliminates the need for external voltage detectors. Consider the thermal resistance of the TDFN package for high-current applications. Verify that the minimum dropout voltage meets the headroom requirements between input and output under maximum load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the MAX6469–MAX6484 family of 300mA LDO regulators. The series combines power management with system supervision in a single IC. Variants differ by output voltage, reset threshold tolerance, and timeout delays. The MAX6474 specifically includes the manual reset feature not present in all family members.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Check for MAX6474 variants with different reset timeouts (suffixes D1-D4). Verify pin compatibility if substituting with other packages like SOT23-6 or UCSP-6.