Analog Devices Inc./Maxim Integrated MAX1792EUA50

Overview

MAX1792EUA50 from Maxim Integrated is a 500mA, low-dropout linear regulator with fixed 5.0V output, operating from +2.5V to +5.5V input, featuring 130mV dropout at full load, ±1% output voltage accuracy over temperature and load, and integrated active-low open-drain reset with 4ms timeout - deployed in portable power rails for USB hubs and notebook computer peripheral modules.

For engineers reviewing the MAX1792EUA50 datasheet, MAX1792EUA50 pinout, MAX1792EUA50 application, or MAX1792EUA50 equivalent, key selection criteria include guaranteed 500mA output under 130mV dropout, 0.1µA shutdown current, thermal shutdown at +170°C, reset threshold at 93% of nominal VOUT, and compatibility with 3.3µF low-ESR ceramic output capacitors.

Technical Context

The MAX1792EUA50 uses an internal PMOS pass transistor (R_DS(ON) ≈ 0.25Ω) enabling load-independent 80µA ground current and stable regulation down to 130mV dropout at 500mA. Its Dual Mode™ architecture selects preset 5.0V output when SET is grounded, bypassing external feedback.

It integrates a 1.25V reference, error amplifier, thermal sensor, current-limit logic (0.55–1.8A short-circuit limit), and open-drain RST output with 90–96% VOUT threshold and 1.5–8ms release delay - all in a thermally enhanced Power-µMAX package with exposed pad.

Key Specifications

Pinout & Package

MAX1792EUA50 is housed in an 8-pin Power-µMAX package (U8E+2 outline) with exposed thermal pad (EP) on underside. The package delivers 1.3W continuous power dissipation at +70°C ambient and requires soldering of EP and GND pins to PCB ground plane for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with TPS76350DBVR and MCP1825-5002E/DB, MAX1792EUA50 uniquely combines 130mV dropout, ±1% accuracy, integrated 4ms RST, and 0.1µA shutdown - making it optimal for space-constrained, battery-aware 5V systems requiring autonomous power sequencing.

Availability

MAX1792EUA50 is available at Aetrix Electronics and suitable for USB hubs, notebook computer peripheral modules, and industrial docking stations requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MAX1792EUA50 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 industrial, communications, and consumer applications.

The MAX1792 series was designed specifically for portable battery-powered equipment demanding ultra-low quiescent current, low dropout, and integrated power-monitoring features - targeting PDA, cellular phone, and notebook subsystem power rails.

FAQ

What is the maximum input voltage for MAX1792EUA50?

The MAX1792EUA50 supports an absolute maximum input voltage of +6V on the IN pin, but its operational input range is specified from +2.5V to +5.5V. Operation above +5.5V risks exceeding safe power dissipation limits and may trigger undervoltage lockout below 2.3V. For reliable 5.0V output, VIN must remain ≥5.13V to stay above the 130mV dropout threshold.

Does MAX1792EUA50 require external components to operate in fixed 5.0V mode?

Yes - MAX1792EUA50 requires a 1µF ceramic capacitor between IN and GND, and a 3.3µF low-ESR ceramic capacitor between OUT and GND for stable operation. The SET pin must be connected to GND to enable fixed 5.0V mode; no resistive divider is needed. The RST pin requires a 100kΩ pullup resistor to OUT for functional reset signaling.

How does the reset output (RST) behave during shutdown of MAX1792EUA50?

When SHDN is pulled low, MAX1792EUA50 enters shutdown mode and forces RST to a hard logic-low state - independent of VOUT level. This differs from normal operation, where RST goes high-impedance after VOUT exceeds 4.65V for 4ms. During shutdown, RST remains asserted to signal system-wide power-down to connected microcontrollers.

Can MAX1792EUA50 deliver 500mA continuously at +85°C ambient?

Yes - MAX1792EUA50 guarantees 500mA output current over the full -40°C to +85°C operating temperature range, provided thermal design meets specifications: the exposed pad and GND pin must be soldered to a sufficient copper area to maintain junction temperature ≤+150°C. At +85°C ambient, power dissipation must stay ≤1.3W (e.g., VIN = 5.5V, VOUT = 5.0V → P = 250mW).

Is MAX1792EUA50 pin-compatible with other MAX1792 variants like MAX1792EUA33?

Yes - all MAX1792 variants including MAX1792EUA50 and MAX1792EUA33 share identical Power-µMAX-8 packaging, pinout, and footprint (U8E+2). Only the preset output voltage and top-mark code differ; no PCB layout changes are required when substituting between voltage options within the same temperature grade (-40°C to +85°C).