MAX6475TA25BD3+T

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

The MAX6475TA25BD3+T is a low-dropout linear regulator with an integrated microprocessor reset circuit. It delivers up to 300mA of load current with a fixed 2.5V output voltage. The device operates within an input voltage range of 2.5V to 5.5V and consumes only 82µA of supply current. It features a remote feedback sense pin for external NPN transistor applications, push-pull or open-drain active-low reset outputs, and four selectable reset timeout periods. The component is housed in an 8-pin TDFN-EP package and is specified for operation from -40°C to +85°C.

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

• Integrated microprocessor reset circuit monitors regulator output and asserts reset when voltage drops below standard tolerances
• Remote feedback sense pin enables connection to external NPN transistors for higher-current applications
• Active-low shutdown input reduces supply current to 0.1µA typical
• Includes thermal shutdown and short-circuit protection

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

• Battery-powered portable equipment
• Handheld instruments such as PDAs and Palmtops
• PCMCIA cards and USB devices
• Cellular and cordless telephones
• Notebook computers

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

Verify the specific suffix codes against official documentation to confirm output voltage, reset threshold accuracy, and timeout delay. Confirm RoHS compliance status and lead-free packaging requirements. Check for availability constraints as nonstandard versions may require factory orders. Ensure proper handling for surface-mount installation.

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

Select this part for designs requiring a fixed 2.5V rail with integrated system supervision. The remote feedback feature supports high-current loads via external pass transistors. Verify that the required reset timeout period matches one of the available options. Ensure the input voltage remains within the specified operating range for stable regulation.

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

This component belongs to the MAX6469–MAX6484 family of ultra-low quiescent current LDO regulators. These devices combine power management with supervisory functions to eliminate external components. The family offers various packages including SOT23, TDFN, and UCSP, catering to space-constrained portable electronics.

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

How does the remote feedback sense pin function?

The FB pin connects to an internal resistor-divider network and allows remote sensing of the output voltage. It can be used with an external NPN transistor to increase current drive capability.

What happens during a thermal overload condition?

When the junction temperature exceeds approximately 180°C, the thermal sensor turns off the pass transistor. The device resumes operation after cooling by 20°C.