Analog Devices Inc./Maxim Integrated MAX1976EZT130+

Overview

MAX1976EZT130+ from Maxim Integrated is a low-dropout linear regulator (LDO) with integrated active-low reset output, designed for battery-powered portable electronics. It delivers 300mA continuous output current with ±0.5% output voltage accuracy at 1.30V, operates from 1.62V to 3.6V input, and features 100mV dropout at full load - enabling extended runtime in space-constrained devices like handheld computers and digital cameras.

For engineers reviewing the MAX1976EZT130+ datasheet, MAX1976EZT130+ pinout, MAX1976EZT130+ application, or MAX1976EZT130+ equivalent, key selection criteria include its 70ms reset delay, thin SOT23-6 package (<1.1mm height), logic-controlled shutdown, thermal-overload protection, and guaranteed performance across –40°C to +85°C.

Technical Context

The MAX1976EZT130+ uses an internal P-channel MOSFET pass transistor (R_DS(ON) = 0.33Ω) to achieve low dropout and supply current independent of load or dropout voltage. Its error amplifier compares a trimmed bandgap reference against feedback from an internal voltage divider to regulate output precisely.

It integrates a power-good comparator that asserts the open-drain RESET output when V_OUT falls below 82.5% of nominal (±1.7% hysteresis); RESET remains asserted for ≥70ms after V_OUT reaches regulation. Shutdown is controlled via active-low SHDN, reducing quiescent current to <1µA.

Key Specifications

Pinout & Package

MAX1976EZT130+ is packaged in a RoHS-compliant, lead-free 6-pin thin SOT23 (Z6-1 package code), measuring 2.9mm × 1.6mm × 1.1mm max height. The exposed pad is absent - thermal dissipation relies on GND pin soldering to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX1976ETT130+, the MAX1976EZT130+ trades thermal headroom for minimal board area; versus XC6219B132MR-G, it delivers tighter regulation, built-in reset timing, and lower dropout - directly reducing BOM count and improving system reliability in portable designs.

Availability

MAX1976EZT130+ is available at Aetrix Electronics and suitable for notebook subsystems, digital cameras, handheld computers, and PCMCIA cards requiring stable component supply with guaranteed long-term availability and RoHS compliance.

Supply support for MAX1976EZT130+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX1963/MAX1976 family was engineered specifically for ultra-low-voltage, high-efficiency power regulation in space- and battery-constrained portable electronics - emphasizing minimal dropout, precision output, and integrated supervisory functions.

FAQ

What is the exact output voltage of the MAX1976EZT130+?

The MAX1976EZT130+ delivers a factory-trimmed, fixed output voltage of 1.30V with ±0.5% accuracy over temperature, line, and load. This value is confirmed in the Selector Guide (suffix "130") and Electrical Characteristics table under "Output Voltage Accuracy" - no external resistors or adjustments are needed.

Does the MAX1976EZT130+ require external capacitors, and what values are recommended?

Yes, the MAX1976EZT130+ requires two ceramic capacitors: a minimum 1µF capacitor between IN and GND, and a 4.7µF low-ESR (≤30mΩ) capacitor between OUT and GND. These values are specified in the Applications Information section and ensure stability, transient response, and noise suppression across –40°C to +85°C.

How does the RESET function behave during power-up and brownout events for the MAX1976EZT130+?

The MAX1976EZT130+ asserts RESET (low) whenever V_OUT drops below 82.5% of 1.30V (≈1.07V) and holds it asserted for ≥70ms after V_OUT rises above that threshold. It also asserts immediately upon shutdown or input undervoltage (V_IN < 1.30V), ensuring reliable microprocessor reset under all fault conditions.

Is the MAX1976EZT130+ pin-compatible with other variants in the MAX1963/MAX1976 family?

Yes - all MAX1963/MAX1976 devices in the thin SOT23-6 package (e.g., MAX1976EZT130+, MAX1963EZT130+) share identical pinout, footprint, and thermal characteristics. Only the output voltage and reset delay (70ms for MAX1976 vs. 2.2ms for MAX1963) differ; no PCB changes are needed when substituting within the same package type.

What thermal considerations apply to the MAX1976EZT130+ in the thin SOT23 package?

The MAX1976EZT130+ in thin SOT23 has a maximum power dissipation of 727mW at +70°C ambient. To maintain safe junction temperature, the GND pin must be soldered to a large PCB copper area acting as a heatsink. Derating is 9.1mW/°C above +70°C - sustained 300mA loads require VIN–VOUT ≤ 2.0V per Figure 2 in the datasheet.