Analog Devices Inc./Maxim Integrated MAX1976ETT150+T

Overview

MAX1976ETT150+T from Maxim Integrated is a low-dropout linear regulator delivering 300mA continuous output current with 100mV dropout at full load, ±0.5% output voltage accuracy, and a fixed 1.50V output. It operates from 1.62V to 3.6V input, features active-low open-drain RESET with 70ms delay, and is designed for space-constrained battery-powered systems such as notebook computers and handheld devices.

For engineers reviewing the MAX1976ETT150+T datasheet, MAX1976ETT150+T pinout, MAX1976ETT150+T application, or MAX1976ETT150+T equivalent, key selection criteria include guaranteed 300mA load capability under low-input-voltage conditions (≥1.62V), precise 1.50V output tolerance, thermal-overload and short-circuit protection, and compatibility with 3mm × 3mm TDFN packaging for high-density PCB layouts.

Technical Context

The MAX1976ETT150+T uses an internal P-channel MOSFET pass transistor (R_DS(ON) = 0.33Ω) enabling supply current independence from load and dropout voltage. Its error amplifier compares a trimmed bandgap reference against feedback from an internal voltage divider to regulate output with ±0.5% accuracy over temperature, line, and load.

RESET functionality monitors V_OUT with 82.5% threshold hysteresis and asserts for ≥70ms after regulation is achieved; shutdown is logic-controlled via active-low SHDN pin, reducing quiescent current to <1µA while pulling OUT to GND through a 1.5kΩ resistor.

Key Specifications

Pinout & Package

MAX1976ETT150+T is housed in a 6-pin 3mm × 3mm thin DFN package (pkg code T633-2), with exposed paddle (EP) connected to GND for thermal dissipation. The package height is <0.8mm, suitable for ultra-thin portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with XC6219B152MR-G and ADP125ARHZ-1.5-R7, the MAX1976ETT150+T uniquely integrates 70ms RESET timing and fits in a compact 3mm × 3mm TDFN, making it optimal for space-constrained, self-contained power-monitoring designs requiring no external components.

Availability

MAX1976ETT150+T is available at Aetrix Electronics and suitable for notebook computers, handheld medical devices, and industrial sensor nodes requiring stable component supply with RoHS-compliant, lead-free packaging and guaranteed 1.50V output accuracy.

Supply support for MAX1976ETT150+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for demanding industrial, computing, and portable applications.

The MAX1963/MAX1976 product line was engineered for ultra-low-input-voltage battery-powered systems needing precise, compact, and protected LDO regulation - specifically targeting next-generation portable electronics where size, efficiency, and reliability are critical.

FAQ

What is the output voltage tolerance of the MAX1976ETT150+T over temperature and load?

The MAX1976ETT150+T guarantees ±0.5% output voltage accuracy across -40°C to +85°C, 1mA to 300mA load, and 1.62V to 3.6V input voltage. This specification is confirmed in the Electrical Characteristics table and applies directly to the MAX1976ETT150+T with its factory-trimmed 1.50V output. No external components affect this tolerance, as the feedback network is fully internal.

Does the MAX1976ETT150+T require external capacitors, and what values are recommended?

Yes, the MAX1976ETT150+T requires a 1µF ceramic capacitor between IN and GND, and a 4.7µF low-ESR ceramic capacitor between OUT and GND. These values ensure stability, transient response, and noise suppression across the full operating range. Using capacitors outside these recommendations - especially higher-ESR types - may cause oscillation or degraded PSRR performance in the MAX1976ETT150+T.

How does the RESET function behave during power-up and brownout events for the MAX1976ETT150+T?

The MAX1976ETT150+T asserts RESET low whenever V_OUT falls below 82.5% of nominal (1.2375V), including during power-up until V_OUT stabilizes and remains above threshold for ≥70ms. During brownout, RESET reasserts immediately upon undervoltage detection. This behavior is intrinsic to the MAX1976ETT150+T's internal comparator and timer architecture - no external components modify the timing or threshold.

Can the MAX1976ETT150+T be used in dropout condition, and how does quiescent current behave there?

Yes, the MAX1976ETT150+T operates continuously in dropout (e.g., VIN = 1.6V, VOUT = 1.5V). In this state, ground current drops to 70µA (typ), significantly lower than non-P-channel LDOs. This behavior is enabled by the internal P-MOSFET architecture and is explicitly characterized in the datasheet's "Ground-Pin Current vs. Load Current" graph for the MAX1976ETT150+T.

Is the MAX1976ETT150+T pin-compatible with other variants in the MAX1963/MAX1976 family?

Yes, all MAX1963/MAX1976 devices in the 6-pin TDFN package - including MAX1976ETT150+T - share identical pinout, footprint, and thermal pad layout (pkg code T633-2). Voltage variants differ only in internal trimming; no PCB redesign is needed when substituting within the same package type, provided RESET timing and output voltage requirements align.