MAX8511EXK31+

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

The MAX8511EXK31+T is a fixed-output ultra-low-noise, low-dropout linear regulator delivering up to 120mA. It provides a preset 3.1V output with a maximum dropout voltage of 170mV at 120mA load. The device operates from an input voltage range of 2V to 6V and maintains a typical ground current of 40µA. It features a ripple rejection of 72dB at 1kHz and 46dB at 100kHz. Output noise is typically 230µVRMS across the 100Hz to 100kHz bandwidth. The component includes overcurrent and thermal shutdown protection and functions within a temperature range of -40°C to +85°C.

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

• Requires only input and output capacitors for stability without needing a bypass capacitor
• Utilizes a P-channel MOSFET pass transistor to minimize quiescent current consumption
• Integrates overcurrent limiting and thermal overload protection mechanisms

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

• Cellular and cordless phones
• PDA and palmtop computers
• Wireless LANs
• Portable and battery-powered equipment

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

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and RoHS compliance status. Confirm that the 'T' suffix indicates tape-and-reel packaging. Ensure the part number matches the exact output voltage code required for the design. Cross-reference the manufacturer's latest datasheet revision to validate all electrical parameters before finalizing procurement specifications.

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

Select this component when space constraints require a small SC-70-5 package while maintaining high power-supply rejection. Choose this model if the application requires a fixed 3.1V rail without external feedback resistors. Consider this regulator for battery-operated systems due to its low ground current and ability to operate near the battery discharge cutoff voltage.

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

This device belongs to the MAX8510/MAX8511/MAX8512 family of ultra-low-noise linear regulators. While the MAX8510 uses a bypass pin for noise reduction and the MAX8512 allows adjustable outputs via an external divider, the MAX8511 variant simplifies design by eliminating the need for a bypass capacitor. All variants share similar electrical characteristics regarding dropout voltage and current capabilities.

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

MAX8511EXK33+T (3.3V output)

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

Does the MAX8511 require a bypass capacitor?

No, the MAX8511 does not require a bypass capacitor, which helps achieve the smallest possible PC board area.

What is the shutdown supply current?

When disabled, the shutdown supply current drops to below 1µA.