Analog Devices Inc./Maxim Integrated MAX4830ELT/V+T

Overview

MAX4830ELT/V+T from Maxim Integrated is a latchoff-mode, 50mA forward-current-limited analog power switch with reverse-current protection, 5mA no-load detection, and 1.4Ω on-resistance at +25°C, designed for load-switching in space-constrained portable electronics requiring fault-aware power control.

For engineers reviewing the MAX4830ELT/V+T datasheet, MAX4830ELT/V+T pinout, MAX4830ELT/V+T application, or MAX4830ELT/V+T equivalent, key selection considerations include its guaranteed 14ms blanking time, open-drain FFLG/NOLD flags, -40°C to +85°C operation, and automotive-qualified /V variant status - all critical for robust battery-powered system design.

Technical Context

The MAX4830ELT/V+T implements a fixed-latchoff response to overcurrent faults: after 14ms blanking, it shuts off permanently until ON is cycled or input voltage drops below UVLO (2.2V max). It uses internal sense-resistor comparison against dual reference voltages to detect forward (>50mA) and reverse (>120mA) current limits.

Its no-load flag (NOLD) asserts low when output current falls below 5mA, with 60µs assertion delay and immediate deassertion; FFLG is open-drain and requires external pullup to IN. Thermal shutdown triggers immediate latchoff at +150°C with 15°C hysteresis.

Key Specifications

Pinout & Package

MAX4830ELT/V+T is housed in a 1mm × 1.5mm, 6-pin µDFN package with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-limit switch applications.

Compared with MAX4830ELT/V+T, MAX4826ELT+T offers lower conduction loss but less sensitive no-load detection, while MAX4831ELT+T replaces manual reset with autoretry - making it more resilient to transient faults but less deterministic in safety-critical latchoff-required scenarios.

Availability

MAX4830ELT/V+T is available at Aetrix Electronics and suitable for GPS systems, cell phones, digital still cameras, and MP3 players requiring stable component supply and automotive-grade reliability.

Supply support for MAX4830ELT/V+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 MAX4826–MAX4831 family targets compact, fault-aware load switching in portable electronics - delivering integrated current limiting, no-load sensing, and automotive qualification in sub-2mm² packages.

FAQ

What does the "/V" suffix indicate in MAX4830ELT/V+T?

The "/V" suffix in MAX4830ELT/V+T denotes AEC-Q100 Grade 3 qualification, confirming operation across -40°C to +85°C and compliance with automotive reliability standards. This makes MAX4830ELT/V+T suitable for infotainment, telematics, and body-control modules where environmental robustness is mandatory - unlike standard-grade variants such as MAX4830ELT+T.

Why is MAX4830ELT/V+T marked "Not Recommended for New Designs"?

MAX4830ELT/V+T is marked Not Recommended for New Designs per Maxim's May 2019 revision, indicating planned obsolescence or supersession by newer alternatives like MAX4831ELT+T (autoretry) or next-generation load switches. While fully functional and supported for existing production, new designs should evaluate replacements offering enhanced features, longer lifecycle, or improved efficiency - especially where latchoff behavior is not strictly required.

How does the 5mA no-load threshold of MAX4830ELT/V+T improve system-level power management?

The 5mA no-load threshold in MAX4830ELT/V+T enables precise detection of ultra-low-power states - such as earphone removal in MP3 players or GPS antenna disconnection - triggering host MCU to disable downstream circuitry. This avoids wasteful idle current draw and extends battery life beyond what 10mA-threshold switches (e.g., MAX4826) can achieve, particularly in always-connected portable devices.

Can MAX4830ELT/V+T be used with a 1.8V logic supply for the ON pin?

Yes - the ON pin of MAX4830ELT/V+T accepts logic-high input down to 2.0V minimum (VIH), so a 1.8V system IO may not reliably assert ON. For 1.8V hosts, use a level shifter or select a variant with lower VIH; MAX4830ELT/V+T itself requires ≥2.0V on ON to guarantee turn-on, ensuring noise margin against false triggering in noisy automotive environments.

What is the significance of the 14ms blanking time in MAX4830ELT/V+T fault response?

The 14ms blanking time in MAX4830ELT/V+T prevents false FFLG assertion during benign inrush events - such as hot-plugging a GPS module with 100nF input capacitance or powering up a camera sensor. Without this blanking, transient currents would trigger immediate latchoff, disrupting initialization. The fixed 14ms window ensures only sustained overloads (>50mA for >14ms) cause shutdown, balancing responsiveness and robustness.