Analog Devices Inc./Maxim Integrated MAX1963AETT150+T

Overview

MAX1963AETT150+T from Maxim Integrated is a low-dropout linear regulator with preset 1.5V output, delivering guaranteed 300mA continuous current from 1.62V–3.6V input, featuring ±0.5% output accuracy, 100mV dropout at full load, and active-low open-drain RESET with 2.2ms delay-designed for core voltage regulation in portable battery-powered systems such as handheld computers and smart phones.

For engineers reviewing the MAX1963AETT150+T datasheet, MAX1963AETT150+T pinout, MAX1963AETT150+T application, or MAX1963AETT150+T equivalent, key selection criteria include input voltage range (1.62V–3.6V), guaranteed 300mA output, 1.5V fixed output, thermal/short-circuit protection, and RESET timing compatibility with microprocessor power-up sequencing.

Technical Context

The MAX1963AETT150+T integrates a p-channel MOSFET pass transistor (R_DS(ON) = 0.33Ω) enabling supply current independence from load and dropout voltage, with quiescent current of 90µA typical under full 300mA load and 70µA in dropout. Its internal reference and error amplifier maintain ±0.5% output accuracy over load, line, and temperature.

RESET functionality uses a precision comparator monitoring V_OUT against 82.5% nominal threshold with 1.7% hysteresis; RESET asserts immediately on undervoltage or shutdown and deasserts after a guaranteed 2.2ms delay once regulation is achieved. Thermal shutdown activates at +165°C with 15°C hysteresis.

Key Specifications

Pinout & Package

MAX1963AETT150+T is housed in a RoHS-compliant 6-pin TDFN package (3mm × 3mm, <0.8mm height) with exposed paddle (EP) for thermal enhancement. 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 MAX1963AETT150+T, TPS7A0515PDBVR trades 300mA capability and RESET integration for lower IQ, while MCP1826T-1502E/DB matches current rating but omits reset functionality and exhibits higher dropout-making MAX1963AETT150+T uniquely suited for compact, reset-critical 1.5V portable rails.

Availability

MAX1963AETT150+T is available at Aetrix Electronics and suitable for notebook computers, cellular handsets, portable audio devices, and PCMCIA cards requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX1963AETT150+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 high-performance analog and mixed-signal ICs for power management, sensing, and interface applications.

The MAX1963A series targets battery-powered portable electronics, delivering high-accuracy, low-dropout regulation with integrated power-good signaling in minimal footprint packages.

FAQ

What is the exact output voltage tolerance of the MAX1963AETT150+T over temperature and load?

The MAX1963AETT150+T guarantees ±0.5% output voltage accuracy at +25°C. Over the full -40°C to +85°C operating range and 1mA–300mA load, the device maintains ±2.5% accuracy per datasheet specifications. This 1.5V output stability ensures reliable operation for 1.5V logic families across environmental extremes without external trimming.

Does the MAX1963AETT150+T require external capacitors, and what values are mandatory?

Yes, the MAX1963AETT150+T requires two mandatory external capacitors: a minimum 1µF ceramic capacitor between IN and GND, and a minimum 4.7µF low-ESR ceramic capacitor between OUT and GND. These values ensure stability, transient response, and PSRR performance across the full operating temperature and load range. ESR must be ≤30mΩ for the output capacitor.

How does the RESET output of the MAX1963AETT150+T behave during shutdown?

During shutdown (SHDN = GND), the MAX1963AETT150+T actively pulls the RESET pin low. RESET remains asserted until both the output has reached regulation *and* the 2.2ms delay timer expires. If SHDN is pulled low while the device is regulating, RESET falls immediately and stays low throughout shutdown, providing synchronized reset signaling to the host µP.

Can the MAX1963AETT150+T operate with an input voltage below 1.62V?

No-the MAX1963AETT150+T has a specified minimum input voltage of 1.62V. Below this, the device enters undervoltage lockout (UVLO) and ceases regulation. The UVLO threshold is 1.30V to 1.60V with 180mV hysteresis, meaning the part will not resume regulation until VIN rises above ~1.48V after dropping out. Operation below 1.62V is outside specification and not guaranteed.

What thermal protection features does the MAX1963AETT150+T include?

The MAX1963AETT150+T incorporates thermal-overload protection that disables the pass transistor when junction temperature exceeds +165°C. After shutdown, the device remains off until the junction cools by 15°C (to ~+150°C), then resumes operation. This hysteresis prevents thermal oscillation. The exposed paddle (EP) in the TDFN package must be soldered to a large ground plane to maximize heat dissipation and sustain 300mA output.