Analog Devices Inc./Maxim Integrated MAX16003DTE+

Overview

MAX16003DTE+ from Maxim Integrated is a low-voltage, hex-voltage microprocessor supervisor IC designed for multivoltage system monitoring in space-constrained applications. It monitors six independent supply rails (e.g., 3.3V, 2.5V, 1.8V, and adjustable down to 0.4V), provides independent open-drain outputs per channel, features a capacitor-adjustable reset timeout (min 140ms), and operates across –40°C to +125°C. It is used in high-reliability server power sequencing and storage controller voltage validation.

For engineers reviewing the MAX16003DTE+ datasheet, MAX16003DTE+ pinout, MAX16003DTE+ application, or MAX16003DTE+ equivalent, key selection criteria include its six-channel monitoring capability, internal 30µA pullups eliminating external resistors, TOL-selectable 5%/10% threshold tolerance, manual reset (MR) and margin enable (MARGIN) inputs, and watchdog timer support with 1.6s typical timeout.

Technical Context

The MAX16003DTE+ implements independent voltage monitoring logic per input (IN1–IN6), where each output (OUT1–OUT6) asserts low upon undervoltage detection without cross-channel coupling. Its reset output (RESET) aggregates all monitored rail statuses and MR assertion, with timeout controlled via SRT pin capacitance or internal 140ms minimum.

It integrates a watchdog timer (WDI input) that triggers RESET on timeout (1.12–2.40s), includes a 54s startup delay after reset (except MAX16005), and supports margin testing via active-low MARGIN input to force all outputs high regardless of input conditions.

Key Specifications

Pinout & Package

MAX16003DTE+ is housed in a 16-pin TQFN package (4mm × 4mm, exposed pad), RoHS-compliant, with thermal performance optimized via EP-to-GND connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with MAX16004DTE+, MAX16003DTE+ provides a distinct factory-set threshold combination optimized for common 3.3V/2.5V/1.8V multirail systems, while TPS3808G33DBVR serves fundamentally different single-rail use cases and cannot fulfill the six-channel supervision or margin test functions of MAX16003DTE+.

Availability

MAX16003DTE+ is available at Aetrix Electronics and suitable for storage equipment, servers, and networking/telecommunication equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16003DTE+ 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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX16000–MAX16007 family was engineered specifically for high-density multivoltage system supervision, addressing the need for scalable, low-quiescent-current voltage monitoring in servers, storage, and telecom infrastructure.

FAQ

What is the function of the TOL pin on the MAX16003DTE+?

The TOL pin on the MAX16003DTE+ selects input threshold tolerance: connecting it to GND configures 5% tolerance, while connecting it to VCC selects 10% tolerance. This allows design flexibility for varying supply accuracy requirements without changing the MAX16003DTE+ part number. The tolerance setting applies uniformly to all monitored inputs (IN1–IN6) and is confirmed in the Electrical Characteristics table under "Threshold Voltages".

Does the MAX16003DTE+ support adjustable reset timeout, and how is it configured?

Yes, the MAX16003DTE+ supports adjustable reset timeout via the SRT pin. Connecting an external capacitor (CSRT) from SRT to GND sets the timeout period using the formula: Reset Timeout (s) = 2.06 × 10⁶ Ω × CSRT (F). With CSRT = 1500pF, timeout is 2.43–3.92ms; leaving SRT open yields ~50µs, and tying SRT to VCC enables the internal minimum of 140ms. This is verified in the RESET section of the Electrical Characteristics table.

How many voltage rails does the MAX16003DTE+ monitor, and what are their threshold options?

The MAX16003DTE+ monitors six voltage rails (IN1–IN6). Thresholds include fixed values (3.3V, 2.5V, 1.8V, and others per Table 1) and adjustable down to 0.4V. For MAX16003DTE+, the factory configuration is IN1 = 3.3V, IN2 = 2.5V, IN3 = ADJ, IN4 = 1.8V, IN5 = ADJ, IN6 = ADJ - confirmed in Table 1 of the datasheet under "MAX16003D".

Can the MAX16003DTE+ be used without an external pullup resistor on its outputs?

Yes, the MAX16003DTE+ includes internal 30µA pullup current on all open-drain outputs (OUT1–OUT6 and RESET), eliminating the need for external pullup resistors. Each output can also be driven with an external voltage up to 5.5V, enabling level-shifting flexibility. This feature is explicitly stated in the General Description and validated in the Electrical Characteristics table under "OUT_ Output-Voltage High".

What is the purpose of the MARGIN pin on the MAX16003DTE+?

The MARGIN pin on the MAX16003DTE+ is an active-low input that forces all outputs (OUT1–OUT6) into a high-impedance (deasserted) state regardless of input voltage conditions - enabling safe voltage margin testing during production. When pulled low, it overrides undervoltage detection, allowing system validation at reduced rail voltages without triggering false resets. This behavior is documented in the General Description and Pin Description sections.