MAX16999AUA11+

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

The MAX16999AUA11+ is a linear regulator from Analog Devices/Maxim Integrated, delivering a fixed 1.1V output at up to 100mA with a typical quiescent current of 13µA. It operates within a 2.5V to 5.5V input range and features an active-low open-drain reset output with a programmable timeout delay via an external capacitor on the CRES pin. The device includes logic-controlled shutdown, short-circuit protection, and thermal-overload protection. It is housed in an 8-pin µMAX package with an exposed pad for enhanced thermal dissipation.

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

• Ultra-low quiescent current consumption for battery-operated applications
• Programmable power-on reset (POR) timeout delay using an external capacitor
• Integrated thermal-overload and short-circuit protection mechanisms
• Logic-controlled enable input for efficient standby mode management

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

• Keep-Alive Timers
• SDRAM Power Supplies
• Industrial Systems
• Handheld and Portable Devices

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead-free packaging specifications prior to procurement. Ensure compatibility with existing PCB footprints and thermal design requirements. Review datasheet revisions for any updates to electrical characteristics or pin configurations before finalizing orders.

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

Select this regulator when low static current is critical during sleep modes. Verify that the required output voltage matches the factory preset options available in the selector guide. Ensure the application environment stays within the specified -40°C to +125°C operating temperature range. Consider the exposed pad requirement for adequate heat dissipation in high-load scenarios.

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

This component belongs to the MAX16999 series of ultra-low output voltage linear regulators designed for high-temperature environments. It serves as a parallel supply to main high-current regulators, powering microcontroller cores or interrupt sections during low-power states. The series supports various fixed output voltages ranging from 0.5V to 3.3V.

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

Consult the official selector guide for alternative output voltage variants within the same package. Cross-reference with other Maxim Integrated LDOs offering similar quiescent current profiles if different voltage outputs are required. Verify pinout compatibility before substituting with non-series components.

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

How is the reset timeout delay configured?

The reset timeout is programmed by connecting an external capacitor between the CRES pin and ground. The delay duration is determined by the capacitance value and internal pullup currents.

What happens when the EN pin is driven low?

Driving the EN pin low places the regulator into standby mode, setting the output to high impedance and reducing input supply current to less than 0.3µA.