Analog Devices Inc./Maxim Integrated MAX22205AUU+T

Overview

MAX22205AUU+T from Analog Devices is a 65V, 7.6A single H-bridge motor driver IC designed for brushed DC and half-step stepper motor control. It integrates low-R_ON FETs (0.15Ω typical total), non-dissipative integrated current sensing (ICS), and programmable current drive regulation (CDR) with 16-level DAC control - enabling precise phase-current limiting in industrial actuators and valve drivers.

For engineers reviewing the MAX22205AUU+T datasheet, MAX22205AUU+T pinout, MAX22205AUU+T application, or MAX22205AUU+T equivalent, this page delivers verified electrical specs, thermal derating guidance at 24V/25°C, TQFN38 package layout notes, CDR timing behavior, and real-world current-sense scaling (K_ISEN = 7500 A/A) for ADC interfacing.

Technical Context

The MAX22205AUU+T implements a fully integrated single H-bridge with dual-channel PWM control (DINA/DINB), enable-driven high-impedance coasting, and sleep-mode operation (20μA quiescent). Its charge-pump gate driver supports VM up to +65V while maintaining robust 0.075Ω typical R_ON per FET leg.

Current regulation uses internal ICS with fixed OFF-time decay (16–24μs, configurable via ROFF), 6A full-scale current setting (via REF resistor), and ±6% trip accuracy over 2.2–6A range. Fault management includes OCP (7.6A threshold), UVLO (4.0V nominal), and thermal shutdown at +155°C with 20°C hysteresis.

Key Specifications

Pinout & Package

MAX22205AUU+T is packaged in a 38-pin TQFN (5mm × 7mm, exposed pad) with 0.5mm pitch. The package supports high-power dissipation via thermal pad soldered to PCB ground plane (θ_JA = 28°C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar H-bridge motor driver applications.

Compared with DRV8876PWPR and STSPIN820TR, the MAX22205AUU+T uniquely combines 65V operation, 7.6A peak capability, non-dissipative current sensing, and fully programmable CDR - making it optimal for compact, high-fidelity motor control where space, thermal efficiency, and precision current regulation are critical.

Availability

MAX22205AUU+T is available at Aetrix Electronics and suitable for industrial motion control, automated valve actuation, and compact stepper subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX22205AUU+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX22205AUU+T belongs to Analog Devices' high-voltage motor driver product line, engineered specifically for space-constrained, thermally demanding applications requiring integrated current sensing and precise current regulation without external shunts.

FAQ

What is the maximum continuous output current for MAX22205AUU+T at +24V?

The MAX22205AUU+T delivers up to 4A_RMS at VM = +24V and T_A = 25°C with proper PCB thermal design - including a multilayer ground plane. This rating assumes θ_JA = 28°C/W (4-layer board). Derating is required above 25°C ambient or with reduced copper area; the device's 7.6A_MAX OCP limit remains active regardless of thermal conditions.

How does the non-dissipative Integrated Current Sensing (ICS) in MAX22205AUU+T eliminate external shunt resistors?

The MAX22205AUU+T uses an internal current mirror architecture (K_ISEN = 7500 A/A) to replicate motor current at ISENA/ISENB pins. This eliminates the need for power-hungry, board-space-consuming external shunt resistors - reducing heat generation and PCB footprint while enabling direct ADC interfacing via simple R_ISEN resistors.

Can MAX22205AUU+T drive a full bipolar stepper motor, or only half-step configurations?

The MAX22205AUU+T integrates one H-bridge and is designed to drive either a single brushed DC motor or one half of a bipolar stepper motor (i.e., one winding pair). To drive a full 4-wire bipolar stepper, two MAX22205AUU+T devices are required - one per winding - coordinated via external controller logic.

What is the function of the CDR pin on MAX22205AUU+T, and how is it used in system design?

The CDR pin on MAX22205AUU+T is an open-drain output that pulses low each time the internal Current Drive Regulation loop activates decay. It provides real-time visibility into CDR activity - useful for debugging current-limit behavior, synchronizing external logic, or triggering diagnostic logging without accessing internal analog signals.

Does MAX22205AUU+T support both slow and fast decay modes, and how are they selected?

Yes, MAX22205AUU+T supports slow, mixed, and fast decay modes via the DECAY1 and DECAY2 logic inputs. These pins configure the bridge's OFF-state behavior during CDR-regulated periods - allowing optimization of torque ripple, efficiency, and motor noise for specific load and speed requirements.