Analog Devices Inc./Maxim Integrated MAX16904SAUE50/V+T

Overview

The MAX16904SAUE50/V+T from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output with 5.0V fixed regulation, operating from +3.5V to +28V input and tolerating +42V transients. It integrates high-side and low-side MOSFETs, features 2.1MHz switching, 25μA quiescent current in SKIP mode, and AEC-Q100 qualification for automotive power rails.

For engineers reviewing the MAX16904SAUE50/V+T datasheet, MAX16904SAUE50/V+T pinout, MAX16904SAUE50/V+T application, or MAX16904SAUE50/V+T equivalent, this page provides verified package mapping (16-pin TSSOP-EP), confirmed thermal shutdown at 175°C, PGOOD monitoring capability, spread-spectrum EMI reduction, and validated alternative options for 5V automotive buck conversion.

Technical Context

The MAX16904SAUE50/V+T implements current-mode control with internal slope compensation and requires no external loop compensation. Its 2.1MHz fixed-frequency operation (with SYNC-selectable forced PWM, SKIP, or external sync modes) enables compact 3.3µH–4.7µH inductors and sub-10µF ceramic output capacitance while avoiding AM-band interference.

It supports dropout operation up to 97% duty cycle via periodic low-side FET activation for BST capacitor recharge, maintains ±2.5% output accuracy across -40°C to +125°C, and delivers regulated 5.0V output with integrated overcurrent protection (1.05A typ) and thermal shutdown (175°C).

Key Specifications

Pinout & Package

MAX16904SAUE50/V+T is housed in a thermally enhanced 16-pin TSSOP-EP package (5mm × 4.4mm, 0.65mm pitch) with exposed pad soldered to PGND for improved thermal dissipation (θJC = 3°C/W). The package supports high-voltage routing and meets AEC-Q100 mechanical stress requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck converter applications.

Compared with LM61480RQWR and TPS62933RTER, the MAX16904SAUE50/V+T uniquely combines AEC-Q100 Grade 0, +42V transient tolerance, and integrated spread-spectrum-making it the only option qualified for direct connection to automotive battery rails in safety-critical systems.

Availability

MAX16904SAUE50/V+T is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial CAN gateway designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MAX16904SAUE50/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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding environments.

The MAX16904 product line delivers compact, high-voltage synchronous buck converters optimized for automotive power systems requiring robust transient response, ultra-low quiescent current, and EMI-controlled operation in constrained spaces.

FAQ

What is the maximum input voltage the MAX16904SAUE50/V+T can withstand without damage?

The MAX16904SAUE50/V+T has an absolute maximum input rating of +42V for durations ≤1 second, enabling reliable operation during automotive cold-crank events. This transient tolerance is validated per AEC-Q100 stress testing and does not require external clamping circuitry when used within the specified 3.5V–28V operating range.

Does the MAX16904SAUE50/V+T require external compensation components?

No, the MAX16904SAUE50/V+T uses internal current-mode control with built-in slope compensation and does not require external compensation networks. Its fixed 5.0V output and optimized loop design ensure stability with standard 4.7µF input and 10µF output ceramic capacitors, simplifying layout and reducing BOM count.

How does the PGOOD signal behave during startup and fault conditions for the MAX16904SAUE50/V+T?

The MAX16904SAUE50/V+T asserts PGOOD high when VOUT rises above 93% of 5.0V (4.65V) and holds it high until VOUT falls below 91% (4.55V); it debounces faults with a 10µs delay. During soft-start, PGOOD remains low until regulation is achieved, and pulls low immediately upon undervoltage or overcurrent detection.

Can the MAX16904SAUE50/V+T operate in dropout, and what is its minimum input voltage for 5.0V output?

Yes, the MAX16904SAUE50/V+T supports dropout operation up to 97% duty cycle, allowing it to maintain 5.0V output with input as low as 5.15V (5.0V ÷ 0.97). In dropout, it periodically activates the low-side FET for ~150ns every 6.5µs to refresh the BST capacitor, sustaining regulation without external intervention.

Is spread-spectrum modulation active by default on the MAX16904SAUE50/V+T, and how is it enabled?

Yes, spread-spectrum modulation is enabled by default on the MAX16904SAUE50/V+T as indicated by the "S" prefix in the part number (SAUE50/V+T). It modulates the 2.1MHz switching frequency by +6% and operates automatically when SYNC is unconnected or grounded-no configuration registers or external components are required.