Analog Devices Inc./Maxim Integrated MAX16999AUA13+T

Overview

MAX16999AUA13+T from Maxim Integrated is a low-quiescent-current linear regulator delivering 100mA at up to +125°C, with preset 1.3V output, 13μA quiescent current, and active-low open-drain reset with capacitor-programmable timeout. It serves as a parallel keep-alive supply for microcontroller core or interrupt sections during sleep mode in high-temperature automotive and industrial systems.

For engineers reviewing the MAX16999AUA13+T datasheet, MAX16999AUA13+T pinout, MAX16999AUA13+T application, or MAX16999AUA13+T equivalent, key selection criteria include ultra-low IQ for always-on operation, factory-trimmed 1.3V output accuracy (±2.5%), thermal shutdown at +165°C, and CRES-based POR delay configurability for power-supply sequencing.

Technical Context

The MAX16999AUA13+T implements a p-channel MOSFET pass transistor with internal feedback divider and precision 0.825×VREF error amplifier reference. Its POR timer uses a 10μA CRES pullup current charging an external capacitor to 600mV threshold, enabling programmable reset timeout independent of input voltage.

Undervoltage lockout activates below 2.2V (with 45mV hysteresis), forcing OUT into high-impedance state regardless of EN status. Thermal protection latches off the pass device above +165°C junction temperature and re-enables it after 15°C cooldown, ensuring pulsed safe-mode operation under sustained overload.

Key Specifications

Pinout & Package

MAX16999AUA13+T is housed in an 8-pin μMAX® package with exposed thermal pad (U8E+2 outline), optimized for high-temperature PCB layouts requiring efficient heat dissipation through direct EP-to-ground-plane connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-quiescent linear regulator applications.

Compared with TPS7A0513PDBVR and NCP114AMX130TBG, the MAX16999AUA13+T uniquely integrates CRES-programmable POR delay, active-low open-drain RESET, and guaranteed 100mA output at +125°C - making it the only option among the three qualified for automotive-grade keep-alive and power-sequencing applications.

Availability

MAX16999AUA13+T is available at Aetrix Electronics and suitable for automotive telematics, industrial motor control, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16999AUA13+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated, now part of Analog Devices, designs high-performance analog and mixed-signal ICs for automotive, industrial, and communications applications.

The MAX16999AUA13+T belongs to Maxim's high-temperature linear regulator product line, engineered specifically for always-on subsystems in automotive infotainment, ADAS, and industrial control where ultra-low quiescent current and robust thermal behavior are mandatory.

FAQ

What is the exact output voltage of MAX16999AUA13+T?

The MAX16999AUA13+T has a factory-trimmed fixed output voltage of 1.3V, with guaranteed accuracy of ±2.5% over the full operating temperature range (-40°C to +125°C). This value is confirmed by the "13" suffix in the part number per Maxim's Selector Guide and is not adjustable via external components.

Does MAX16999AUA13+T support power-supply sequencing via external capacitor?

Yes, the MAX16999AUA13+T supports programmable power-on reset (POR) sequencing using an external capacitor on the CRES pin. The reset timeout is determined by a 10μA internal pullup current charging the capacitor to a 600mV threshold, enabling precise delay control without additional timing ICs.

What protection features does MAX16999AUA13+T include?

The MAX16999AUA13+T includes short-circuit protection on the RESET pin, thermal-overload protection triggering at +165°C with 15°C hysteresis, undervoltage lockout below 2.2V, and current limiting up to 150mA (typical). These features ensure reliable operation in fault-prone automotive and industrial environments.

Can MAX16999AUA13+T be used in parallel with another regulator?

Yes, the MAX16999AUA13+T is explicitly designed for parallel operation with other regulators of equal output voltage, as stated in its Applications Information section. Its architecture avoids cross-conduction and supports low-power keep-alive functions alongside higher-current supplies in μC systems.

What is the thermal performance of MAX16999AUA13+T on a multilayer PCB?

On a multilayer PCB, the MAX16999AUA13+T exhibits a junction-to-ambient thermal resistance (θJA) of 77.6°C/W and a junction-to-case (θJC) of 4.8°C/W. With its exposed paddle (EP) properly soldered to a ground plane, it delivers 100mA continuously at +125°C ambient without thermal shutdown.