Analog Devices Inc./Maxim Integrated MAX1963AEZT300+T

Overview

MAX1963AEZT300+T from Maxim Integrated is a low-dropout linear regulator with pMOS pass transistor, delivering 300mA continuous output at ±0.5% accuracy over load/line/temperature, 100mV dropout at full load, and active-low open-drain RESET with 2.2ms delay-designed for power management in portable battery-powered systems such as handheld computers and cellular phones.

For engineers reviewing the MAX1963AEZT300+T datasheet, MAX1963AEZT300+T pinout, MAX1963AEZT300+T application, or MAX1963AEZT300+T equivalent, key selection criteria include guaranteed 300mA output under 1.62V–3.6V input, preset 3.0V output, thermal/short-circuit protection, and SOT23-6 package compatibility with space-constrained PCB layouts.

Technical Context

The MAX1963AEZT300+T uses an internal p-channel MOSFET (R_DS(ON) = 0.33Ω) to achieve low dropout and supply current independent of load or dropout voltage. Its error amplifier compares a precision reference against feedback from an internal voltage divider to regulate output.

RESET functionality is implemented via a dedicated power-good comparator monitoring V_OUT; it asserts low when V_OUT falls below 82.5% of nominal and remains asserted ≥2.2ms after regulation is achieved. Shutdown is logic-controlled via active-low SHDN pin with sub-1µA off-state current.

Key Specifications

Pinout & Package

MAX1963AEZT300+T is packaged in a 6-pin thin SOT23-6 (1.6mm × 2.9mm × 1.1mm), RoHS-compliant, lead-free package with exposed pad not present (SOT23 variant). Pin 1 is IN; pin 2 is GND; pin 3 is SHDN; pin 4 is RESET; pin 5 is I.C. (internally connected, leave unconnected or tie to GND); pin 6 is OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS73030DBVR and MCP1825-3002E/DB, MAX1963AEZT300+T uniquely integrates a 2.2ms RESET output in the same SOT23-6 footprint while maintaining lower dropout (100mV vs. ≥150mV) and tighter output accuracy (±0.5% vs. ±1–2%), making it optimal for space-constrained, battery-powered systems requiring coordinated power-up sequencing.

Availability

MAX1963AEZT300+T is available at Aetrix Electronics and suitable for notebook computers, cellular phones, and portable media players requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX1963AEZT300+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 MAX1963A series targets ultra-low-input-voltage, high-accuracy LDO regulation in portable battery-powered equipment-emphasizing minimal dropout, low quiescent current, and integrated power-supply supervision.

FAQ

What is the output voltage of MAX1963AEZT300+T?

The MAX1963AEZT300+T has a factory-preset output voltage of 3.0V, confirmed by the "300" suffix in the part number and the Selector Guide. This fixed output eliminates external feedback resistors and ensures ±0.5% accuracy across load, line, and temperature conditions without user calibration.

Does MAX1963AEZT300+T include a RESET output, and what is its timing behavior?

Yes, MAX1963AEZT300+T features an active-low, open-drain RESET output that remains asserted for at least 2.2ms after the output reaches regulation. It deasserts immediately if V_OUT drops below 82.5% of nominal voltage or during shutdown, providing reliable power-on reset signaling for microprocessors.

What package type and dimensions does MAX1963AEZT300+T use?

MAX1963AEZT300+T is supplied in a 6-pin thin SOT23-6 package (1.6mm × 2.9mm × 1.1mm height), RoHS-compliant and lead-free. The package includes no exposed thermal pad-thermal performance relies on soldering pins 2 (GND) and 6 (OUT) to large copper areas per the datasheet layout guidance.

What protection features are built into MAX1963AEZT300+T?

MAX1963AEZT300+T integrates thermal-overload protection (shuts down at +165°C junction temperature with 15°C hysteresis), short-circuit current limiting (450–650mA trip range), and input undervoltage lockout (1.3–1.6V threshold). These functions operate autonomously without external components to safeguard both the IC and downstream circuitry.

Can MAX1963AEZT300+T operate from a single Li-ion cell?

Yes, MAX1963AEZT300+T operates from 1.62V to 3.6V input, making it compatible with a single Li-ion or Li-polymer cell across its full discharge curve (typically 4.2V down to ~2.7V). Its 100mV dropout at 300mA allows regulation until the cell voltage drops to 3.1V, maximizing usable battery capacity.