Analog Devices Inc./Maxim Integrated MAX16999AUA06+T

Overview

MAX16999AUA06+T from Maxim Integrated is a low-quiescent-current linear regulator delivering 100mA at 0.6V output, operating from 2.5V to 5.5V input, with 13μA typical quiescent current and active-low open-drain reset. It features logic-controlled enable, adjustable POR delay via external CRES capacitor, thermal and short-circuit protection, and is used in parallel with high-current supplies to power microcontroller core/interrupt sections during sleep mode.

For engineers reviewing the MAX16999AUA06+T datasheet, MAX16999AUA06+T pinout, MAX16999AUA06+T application, or MAX16999AUA06+T equivalent, key selection criteria include ultra-low IQ (13μA), factory-trimmed 0.6V output, ±2.5% output accuracy over temperature, 8-pin μMAX-EP package with exposed pad for thermal management, and programmable reset timeout for reliable power-supply sequencing in high-temperature automotive and industrial systems.

Technical Context

The MAX16999AUA06+T integrates a p-channel MOSFET pass transistor, precision reference, error amplifier, and internal feedback divider to regulate 0.6V output with dropout as low as 35mV at 80mA. Its POR timer uses a 10μA pullup current on CRES to generate reset timeout, with fault-timer fallback ensuring startup even if CRES fails shorted.

Logic-controlled EN input latches its state via 120kΩ internal resistors, enabling robust operation during signal-line disconnection. UVLO (2.2V max threshold, 45mV hysteresis) disables regulation below valid input voltage, while thermal shutdown activates at +165°C with 15°C hysteresis to prevent damage under sustained overload.

Key Specifications

Pinout & Package

The MAX16999AUA06+T is housed in an 8-pin μMAX-EP package (outline 21-0107) with exposed paddle (EP) soldered to PCB ground plane for optimal thermal dissipation. Pin 1 and 2 are paralleled OUT terminals; pins 7 and 8 are paralleled IN terminals; EP serves as thermal and electrical ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0506PDBVR and NCP114AMX06T2G, the MAX16999AUA06+T uniquely combines ultra-low 13μA IQ, integrated programmable reset, exposed-pad thermal design, and guaranteed 100mA operation at +125°C - making it the only option for mission-critical automotive and industrial keep-alive applications demanding simultaneous low power, high reliability, and precise sequencing.

Availability

MAX16999AUA06+T is available at Aetrix Electronics and suitable for automotive telematics, industrial motor control microcontrollers, and handheld portable device power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16999AUA06+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, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.

The MAX16999 series was developed specifically for high-reliability, high-temperature linear regulation in automotive and industrial microcontroller subsystems requiring ultra-low quiescent current and integrated power-on-reset functionality.

FAQ

What is the exact output voltage of MAX16999AUA06+T and how is it set?

The MAX16999AUA06+T has a factory-trimmed fixed output voltage of 0.6V, confirmed by the "06" suffix in the part number per Maxim's Selector Guide. This voltage is internally trimmed during wafer sort and does not require external resistors or feedback components. Output accuracy is guaranteed at ±2.5% over -40°C to +125°C, with typical drift less than ±0.2% across temperature, making MAX16999AUA06+T ideal for precision low-voltage core supply applications.

How does the reset timeout work on MAX16999AUA06+T and what capacitor value is needed for a 50ms delay?

The MAX16999AUA06+T generates reset timeout using a 10μA internal pullup current charging an external capacitor on the CRES pin. The formula t = CCRES × 60 × 10³ gives delay in seconds, so for 50ms, CCRES = 50×10⁻³ / (60×10³) ≈ 833pF. A standard 820pF or 1000pF ceramic capacitor yields 49.2ms or 60ms respectively. The MAX16999AUA06+T also includes a 100ms fault timer to guarantee startup even if CRES shorts, ensuring robustness in safety-critical systems.

Can MAX16999AUA06+T be used in parallel with another regulator, and what design considerations apply?

Yes, MAX16999AUA06+T is explicitly designed for parallel operation with other regulators of equal output voltage, as documented in the Applications Information section and Figure 2. Key considerations include matching output voltages within ±1%, using separate input/output capacitors per regulator, and ensuring both regulators share the same ground reference plane. The MAX16999AUA06+T's low dropout and tight output tolerance minimize current imbalance, enabling hybrid architectures where it handles standby loads while a higher-current LDO powers active modes.

What thermal performance can be expected from MAX16999AUA06+T on a standard 4-layer PCB?

On a multilayer PCB, the MAX16999AUA06+T achieves θJA = 77.6°C/W and continuous power dissipation of 1030.9mW at TA = +70°C (derating 12.9mW/°C above). With its exposed paddle (EP) soldered to a solid ground plane, junction-to-case thermal resistance is 4.8°C/W. At 100mA load and 3.3V input, power dissipation is ~200mW, resulting in <16°C junction-to-ambient rise - well within the +150°C absolute maximum rating. This makes MAX16999AUA06+T suitable for compact, unventilated enclosures in industrial motor controllers.

Does MAX16999AUA06+T support automotive qualification standards such as AEC-Q100?

The MAX16999AUA06+T is rated for -40°C to +125°C operating temperature and features automotive-grade protections including UVLO, thermal shutdown (+165°C), and short-circuit robustness. However, per Revision 1 of the datasheet, explicit AEC-Q100 qualification was removed from the Features section, and no AEC-Q100 test report is referenced. While widely deployed in automotive telematics, MAX16999AUA06+T should be validated per customer-specific qualification protocols before use in safety-critical automotive applications.