Analog Devices Inc./Maxim Integrated MAX6329VLUT+T

Overview

The MAX6329VLUT+T from Maxim Integrated is a 150mA, low-dropout linear voltage regulator with integrated microprocessor reset circuit, preset for +1.8V output and -10% reset threshold (V/V variant), housed in SOT23-6 package. It delivers 25µA quiescent current, 180mV dropout at 100mA, and features active-low open-drain RESET output with 100ms minimum timeout-ideal for battery-powered handheld instruments and USB devices requiring stable low-voltage supply and reliable power-on reset.

For engineers reviewing the MAX6329VLUT+T datasheet, MAX6329VLUT+T pinout, MAX6329VLUT+T application, or MAX6329VLUT+T equivalent, key selection criteria include its fixed +1.8V output, -10% reset threshold, SHDN-controlled shutdown (<1µA), thermal/short-circuit protection, and compatibility with 1µF ceramic output capacitors-critical for space-constrained portable designs.

Technical Context

The MAX6329VLUT+T implements a P-channel MOSFET pass transistor architecture enabling low dropout (180mV @ 100mA) and zero reverse leakage current. Its internal 1.23V reference feeds both the regulator error amplifier and reset comparator, ensuring tight tracking between output voltage and reset threshold (VTH = 0.835 × VADJ to 0.915 × VADJ for V/V variant).

It integrates a dedicated shutdown control path (SHDN pin) that disables the pass transistor, reference, and bias circuits-reducing total supply current to ≤1µA. The reset circuit asserts active-low open-drain RESET for ≥100ms after VOUT rises above 1.50V–1.65V (−10% of 1.8V), independent of load or input transients.

Key Specifications

Pinout & Package

Package: SOT23-6 - thermally enhanced 6-pin surface-mount package with GND pin acting as heatsink; requires soldering to large copper area for optimal thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout regulator with integrated reset applications.

Compared with MAX6328VLUT+T, the MAX6329VLUT+T offers higher reset threshold hysteresis margin for noisy environments; compared with TPS76318QDBVRQ1, it delivers full power-supervision integration in one die but lacks automotive qualification and extended temperature range.

Availability

MAX6329VLUT+T is available at Aetrix Electronics and suitable for hand-held instruments, USB devices, and palm top computers requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant packaging.

Supply support for MAX6329VLUT+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 precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.

The MAX6329 series belongs to Maxim's micropower supervisory regulator product line, engineered specifically for battery-operated portable electronics needing ultra-low IQ, integrated reset, and small-footprint power solutions.

FAQ

What output voltage does the MAX6329VLUT+T provide?

The MAX6329VLUT+T provides a fixed +1.8V output voltage with ±3.0% accuracy over the operating temperature range (0°C to +85°C). This value is set by internal feedback resistors when the SET pin is connected to GND, as confirmed in the Selector Guide and Electrical Characteristics table for the V/V variant.

What is the reset threshold voltage for the MAX6329VLUT+T?

The MAX6329VLUT+T has a −10% reset threshold, meaning RESET asserts when VOUT falls below 1.50V–1.65V and remains asserted for ≥100ms after VOUT rises above that range. This is explicitly defined in the Reset Threshold (VTH) table for MAX63_9V variants with SET = GND.

Does the MAX6329VLUT+T support shutdown functionality?

Yes, the MAX6329VLUT+T includes an active-low SHDN pin that reduces total supply current to <1µA when driven low. This feature is exclusive to the MAX6329 family (not MAX6349) and is verified in the Pin Description and Electrical Characteristics sections of the datasheet.

What type of reset output does the MAX6329VLUT+T use?

The MAX6329VLUT+T uses an active-low open-drain RESET output, as indicated by the "P" suffix in its top-mark code (AAIR) and confirmed in the Selector Guide under "RESET OUTPUT" column for VL variants. It requires an external pullup resistor to interface with standard logic inputs.

Can the MAX6329VLUT+T operate with a 1µF output capacitor?

Yes, the MAX6329VLUT+T is fully stable with a minimum 1µF ceramic or tantalum output capacitor, as stated in the Features list and Applications Information section. This enables compact, low-cost designs without ESR constraints-verified across temperature and load conditions in the Typical Operating Characteristics.