Analog Devices Inc./Maxim Integrated MAX16904SATB41/V+T

Overview

The MAX16904SATB41/V+T from Maxim Integrated is a synchronous buck DC-DC converter delivering 600mA output with 4.1V fixed output voltage, +3.5V to +28V input range, 2.1MHz switching frequency, and 25μA no-load quiescent current-designed for automotive power rails in engine control units and ADAS camera modules.

For engineers reviewing the MAX16904SATB41/V+T datasheet, MAX16904SATB41/V+T pinout, MAX16904SATB41/V+T application, or MAX16904SATB41/V+T equivalent, key selection criteria include AEC-Q100 qualification, spread-spectrum EMI reduction, dropout operation at 97% duty cycle, and compatibility with 3mm × 3mm TDFN-EP thermal layout.

Technical Context

This current-mode buck regulator integrates high-side and low-side DMOS switches (R_DS(ON) = 400–800mΩ / 250–450mΩ), operates across -40°C to +125°C, and features programmable SYNC input enabling SKIP mode (25μA IQ), forced PWM, or external clock synchronization. Its 80ns minimum on-time supports stable regulation down to 4.1V output even at 18V input.

Thermal protection triggers shutdown at 175°C with 15°C hysteresis; PGOOD monitors output voltage with 88–98% threshold window and 10μs debounce; undervoltage lockout activates at 2.8–3.2V rising edge. The device tolerates +42V transients and maintains regulation during cold-crank events.

Key Specifications

Pinout & Package

MAX16904SATB41/V+T uses a thermally enhanced 10-pin TDFN-EP package (3mm × 3mm, 0.75mm height) with exposed pad soldered to PGND for optimal heat dissipation. Pin 1 is BST; pins 2 and 3 are SUP (dual-input configuration); pins 4 and 5 are LX and PGND respectively; OUTS, PGOOD, SYNC, BIAS, GND, and EN occupy remaining positions; pins 9–10 and EP are NC and exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM66430QRGTRQ1 and TPS62933RTER, the MAX16904SATB41/V+T uniquely combines AEC-Q100 Grade 0 qualification, 4.1V factory-trimmed output, integrated spread-spectrum, and 25μA SKIP-mode IQ in a 3mm × 3mm automotive-grade package-making it optimal for cost-sensitive, space-constrained automotive subsystems requiring zero design-in risk.

Availability

MAX16904SATB41/V+T is available at Aetrix Electronics and suitable for automotive ECU power rails, ADAS camera modules, infotainment head units, and telematics control units requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for MAX16904SATB41/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 automotive, industrial, and communications markets.

The MAX16904 product line delivers high-voltage, low-IQ synchronous buck converters optimized for automotive subsystems requiring AEC-Q100 compliance, cold-crank resilience, and EMI-controlled operation in compact form factors.

FAQ

What is the fixed output voltage of the MAX16904SATB41/V+T?

The MAX16904SATB41/V+T is factory-trimmed to deliver a precise 4.1V output voltage with ±2.5% accuracy in fixed-frequency mode and ±4.0% in SKIP mode. This value is laser-trimmed during production and cannot be adjusted externally-ensuring consistent performance across temperature and load without feedback resistor networks.

Does the MAX16904SATB41/V+T support spread-spectrum modulation?

Yes, the MAX16904SATB41/V+T includes optional spread-spectrum frequency modulation (±6% around 2.1MHz) to reduce peak radiated EMI emissions. This feature is enabled by default in the /V+ suffix variant and operates only when the device runs at its internal oscillator frequency-not during external SYNC synchronization.

What package type and thermal characteristics does the MAX16904SATB41/V+T use?

The MAX16904SATB41/V+T uses a 10-pin TDFN-EP package (3mm × 3mm × 0.75mm) with exposed pad. Its thermal resistance is θ_JA = 41°C/W and θ_JC = 9°C/W on a four-layer board-enabling 600mA operation up to +125°C ambient when the exposed pad is properly soldered to a large PGND copper area with thermal vias.

How does the MAX16904SATB41/V+T handle automotive cold-crank conditions?

The MAX16904SATB41/V+T sustains regulation during cold-crank (input down to ~4.25V) by operating at up to 97% duty cycle. Its 80ns minimum on-time and current-mode control maintain stability, while the PGOOD signal remains asserted until V_OUT falls below 91%-ensuring reliable MCU boot sequencing even during deep battery sag.

Is the MAX16904SATB41/V+T AEC-Q100 qualified?

Yes, the MAX16904SATB41/V+T is fully AEC-Q100 qualified for Grade 0 (-40°C to +125°C ambient), including stress testing for temperature cycling, humidity, mechanical shock, and ESD (±2kV HBM). The "/V+" suffix explicitly denotes automotive qualification per this standard.