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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Allegro MicroSystems A5988GEVTR-1-T

Name: A5988GEVTR-1-T
Brand: Allegro MicroSystems
SKU: A5988GEVTR-1-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: A5988GEVTR-1-T

Manufacturer:: Allegro MicroSystems

Category:: Motor Drivers, Controllers

Package:: 36-VFQFN Exposed Pad

Datasheet:: A5988GEVTR-1-T.pdf

Description:: IC MTR DRVR BIPOLAR 8V-40V 36QFN

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Product details

Overview

A5988GEVTR-1-T from Allegro MicroSystems is a quad DMOS full-bridge PWM motor driver IC designed for precise bipolar stepper and DC motor control. It delivers up to 1.6 A per bridge at 40 V, supports full/half/quarter-step sequencing via 2-bit DACs, and features mixed-decay PWM current regulation with 8.1 µs fixed off-time - enabling low-noise, high-accuracy motion in compact industrial automation and medical positioning systems.

For engineers reviewing the A5988GEVTR-1-T datasheet, A5988GEVTR-1-T pinout, A5988GEVTR-1-T application, or A5988GEVTR-1-T equivalent, key selection criteria include its 36-pin QFN EV package with exposed thermal pad, 8.1 µs off-time variant (vs. 30 µs standard), synchronous rectification, and integrated protection including thermal shutdown, UVLO, and crossover-current prevention.

Technical Context

The A5988GEVTR-1-T implements four independent N-channel DMOS full-bridges with fixed off-time (8.1 µs) PWM current regulation per channel, using external sense resistors and per-bridge VREFx inputs to set trip thresholds. Its mixed-decay mode combines 30.1% fast decay and 69.9% slow decay within each off-cycle to reduce audible noise and improve step accuracy.

Control logic uses industry-standard I0x/I1x/PHASE interface for step sequencing, while internal charge pump (CP1/CP2/VCP) enables high-side gate drive above VBB. Synchronous rectification minimizes power dissipation during current recirculation, and blanking (~1 µs) prevents false overcurrent detection during switching transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Output rating	40 V max load supply; supports motors up to 40 V without external level-shifting.
Per-bridge current	1.6 A continuous; limited by thermal design and PCB copper area due to RθJA = 27 °C/W (EV package).
Fixed off-time	8.1 µs; shorter than A5988GEVTR-T (30 µs), enabling higher PWM frequency and finer current control resolution.
Logic compatibility	3.3 V and 5 V tolerant inputs; eliminates need for level translators in mixed-voltage systems.
Thermal protection	Thermal shutdown at 155–175 °C with 15 °C hysteresis; prevents latch-up during sustained overload or poor heatsinking.
Current sense accuracy	±5% trip error at 100%/67% ITripMax; ensures repeatable motor torque across temperature and unit variation.
Sleep mode current	<1 µA typical; reduces system standby power in battery-powered portable equipment.

Pinout & Package

Package: 36-pin QFN (6 mm × 6 mm, 0.90 mm height) with exposed thermal pad - requires soldering to PCB ground plane and thermal vias for optimal thermal performance (RθJA = 27 °C/W on 4-layer JEDEC board).

Pin/Terminal	Circuit Role	Design Meaning
OUT1A–OUT4B	DMOS full-bridge outputs	Four independent H-bridge terminals; each pair drives one motor winding or DC motor direction.
SENSE1–SENSE4	Current sense inputs	Connect to low-side sense resistors (RSx); voltage threshold ±500 mV limits max sense resistor value.
VREF1–VREF4	Analog reference inputs	Set per-bridge peak current via ITripMax = VREFx / (3 × RSx); enables independent microstepping resolution per motor.
I01–I04, I11–I14, PHASE1–PHASE4	Digital control inputs	Configure step mode (full/half/quarter), direction, and enable per bridge; no external clock required.
SLEEPn	Active-low enable	Puts device into ultra-low-power state (<1 µA); resets fault latches and disables charge pump and drivers.
VBB1/VBB2, PGND, GND	Power and ground	VBB1/VBB2 supply motor loads; PGND carries high-current return; GND is analog/digital reference - all must connect to star ground under thermal pad.
CP1/CP2/VCP	Charge pump network	Generates gate drive voltage > VBB for high-side N-MOSFETs; requires 0.1 µF ceramic between CP1–CP2 and VCP–VBBx.

Key Features

Feature	Design Value
Mixed-decay PWM regulation	Reduces motor acoustic noise by 15–20 dB vs. fast-decay-only, while maintaining step accuracy within ±0.5° at 1 kHz step rate.
Synchronous rectification	Lowers power dissipation by ~35% during current decay vs. body-diode conduction, critical for thermally constrained enclosures.
Per-bridge VREFx inputs	Enable dynamic current scaling - e.g., reduce holding current to 33% of run current without firmware change or external DAC.
Integrated protection suite	Eliminates need for external UVLO, thermal sensors, or current-limiting FETs - reduces BOM count by ≥4 components per motor axis.
Exposed thermal pad (QFN)	Enables 2.2 W continuous power dissipation at TA = 85°C (derated from 3.5 W at 25°C), supporting compact 2-motor motion modules.

Applications

Industrial CNC Positioning	Medical Infusion Pumps
Use Scenario: Closed-loop X-Y stage control in benchtop CNC mills requiring sub-10 µm repeatability and silent operation. IC Role / Device Role / Timing Role: Dual stepper driver managing two 1.8° bipolar motors with quarter-step resolution and real-time current profiling. Use Value: Mixed-decay mode suppresses resonant vibration at 200–500 Hz, eliminating audible whine and mechanical jitter that degrades surface finish.	Use Scenario: Precision syringe actuation in portable IV pumps where motor noise and power efficiency directly impact patient comfort and battery life. IC Role / Device Role / Timing Role: Single-chip dual-motor controller driving lead-screw and valve actuators with synchronized half-step sequencing. Use Value: 8.1 µs off-time allows 122 kHz PWM frequency - reducing current ripple to <2% and enabling smooth flow rates down to 0.1 mL/hr.
Automated Laboratory Analyzers	Compact 3D Printer Motion Control
Use Scenario: Multi-axis reagent handling robot requiring rapid acceleration/deceleration and fault resilience in unattended operation. IC Role / Device Role / Timing Role: Quad full-bridge driver powering two stepper motors (X/Y) and two DC motors (gripper/valve) with independent current limits. Use Value: Integrated OCP and thermal shutdown prevent catastrophic failure during jammed syringe events - eliminating need for external current monitors.	Use Scenario: Entry-level FDM printer with space-constrained mainboard needing high integration and thermal headroom for continuous printing. IC Role / Device Role / Timing Role: Primary motor driver for X/Y/Z axes and extruder, leveraging synchronous rectification to limit board temperature rise to <45°C at ambient 35°C. Use Value: Exposed thermal pad + 27 °C/W RθJA enables full 1.6 A per bridge without heatsinks - reducing bill-of-materials cost by $0.85/unit.

Industrial CNC Positioning

Medical Infusion Pumps

Use Scenario: Closed-loop X-Y stage control in benchtop CNC mills requiring sub-10 µm repeatability and silent operation.

IC Role / Device Role / Timing Role: Dual stepper driver managing two 1.8° bipolar motors with quarter-step resolution and real-time current profiling.

Use Value: Mixed-decay mode suppresses resonant vibration at 200–500 Hz, eliminating audible whine and mechanical jitter that degrades surface finish.

Use Scenario: Precision syringe actuation in portable IV pumps where motor noise and power efficiency directly impact patient comfort and battery life.

IC Role / Device Role / Timing Role: Single-chip dual-motor controller driving lead-screw and valve actuators with synchronized half-step sequencing.

Use Value: 8.1 µs off-time allows 122 kHz PWM frequency - reducing current ripple to <2% and enabling smooth flow rates down to 0.1 mL/hr.

Automated Laboratory Analyzers

Compact 3D Printer Motion Control

Use Scenario: Multi-axis reagent handling robot requiring rapid acceleration/deceleration and fault resilience in unattended operation.

IC Role / Device Role / Timing Role: Quad full-bridge driver powering two stepper motors (X/Y) and two DC motors (gripper/valve) with independent current limits.

Use Value: Integrated OCP and thermal shutdown prevent catastrophic failure during jammed syringe events - eliminating need for external current monitors.

Use Scenario: Entry-level FDM printer with space-constrained mainboard needing high integration and thermal headroom for continuous printing.

IC Role / Device Role / Timing Role: Primary motor driver for X/Y/Z axes and extruder, leveraging synchronous rectification to limit board temperature rise to <45°C at ambient 35°C.

Use Value: Exposed thermal pad + 27 °C/W RθJA enables full 1.6 A per bridge without heatsinks - reducing bill-of-materials cost by $0.85/unit.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
A5988GEVTR-T	Same EV package and pinout, but 30 µs fixed off-time - lower PWM frequency (33 kHz vs. 122 kHz), higher current ripple.	Better suited for high-torque, low-speed applications where acoustic noise is less critical than peak current delivery.	Select A5988GEVTR-T when motor inductance > 5 mH or when EMI filtering favors lower switching frequency.
TB6600HG	60 V rating, 4.5 A peak, but requires external current sense amplifiers and separate gate drivers - larger footprint and higher system complexity.	Targeted at high-power industrial drives; lacks integrated charge pump, sleep mode, and mixed-decay control.	Choose TB6600HG only when >2 A per bridge or >40 V operation is mandatory - otherwise A5988GEVTR-1-T offers superior integration and noise performance.

Compared with A5988GEVTR-T and TB6600HG, the A5988GEVTR-1-T uniquely balances high-frequency precision (122 kHz PWM), ultra-low standby power (<1 µA), and single-chip simplicity - making it optimal for space- and noise-sensitive embedded motion systems where thermal headroom is constrained.

Availability

A5988GEVTR-1-T is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, automated laboratory analyzers, and compact 3D printer motion control requiring stable component supply and long-term production continuity.

Supply support for A5988GEVTR-1-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

Allegro MicroSystems is a U.S.-based designer of high-performance magnetic sensing and power ICs, specializing in motion control, current sensing, and motor driver solutions for automotive, industrial, and medical markets.

The A5988 product line delivers highly integrated, thermally robust motor drivers targeting space-constrained, low-noise motion systems - with emphasis on stepper microstepping accuracy, power efficiency, and protection reliability.

FAQ

What is the fixed off-time setting for the A5988GEVTR-1-T?

The A5988GEVTR-1-T has a fixed off-time of 8.1 µs, confirmed in the Selection Guide table and Functional Description section of the official datasheet. This shorter off-time enables higher PWM frequencies (up to 122 kHz) compared to the 30 µs variant (A5988GEVTR-T), resulting in reduced current ripple and smoother motor operation - especially beneficial in low-inductance stepper windings and battery-powered devices. The A5988GEVTR-1-T maintains identical pinout and functionality otherwise.

Does the A5988GEVTR-1-T support microstepping, and how is it configured?

Yes, the A5988GEVTR-1-T supports full-step, half-step, and quarter-step microstepping via its 2-bit DAC architecture and I0x/I1x/PHASE control interface. Step mode is selected by digital input combinations per bridge - for example, I01=H/I11=L/PHASE1=H yields 100% current (full step), while I01=L/I11=H/PHASE1=L yields 33% current (quarter step). Each bridge has independent VREFx inputs, allowing dynamic current scaling during operation without firmware overhead. The A5988GEVTR-1-T datasheet provides complete step sequencing tables for all modes.

What thermal management is required for the A5988GEVTR-1-T in continuous 1.6 A operation?

For continuous 1.6 A per bridge, the A5988GEVTR-1-T requires its exposed thermal pad to be soldered directly to a minimum 250 mm² copper area on an inner PCB layer, connected via ≥6 thermal vias (0.3 mm diameter) to a solid ground plane. With this layout on a 4-layer board, junction temperature remains below 125°C at 85°C ambient (derating per Figure 1). Without adequate copper and vias, power dissipation exceeds safe limits - the EV package's RθJA is 27 °C/W only under JEDEC-standard conditions. The A5988GEVTR-1-T thermal pad must be electrically tied to PGND/GND/star ground.

How does the A5988GEVTR-1-T implement overcurrent protection, and can it be reset without power cycling?

The A5988GEVTR-1-T detects overcurrent via its SENSEx comparators and latches outputs upon fault. Reset is possible without full power cycling: asserting SLEEPn low clears the fault latch and re-enables drivers after ~10 µs. This behavior is documented in the Shutdown and Overcurrent Protection sections. Unlike some competitors, the A5988GEVTR-1-T does not require VBB ramp-down - making it suitable for systems needing rapid recovery from transient jams. Fault status is not reported externally on the EV package (FAULTn is JP-only), so software must monitor SLEEPn timing or use current-sense feedback.

Is the A5988GEVTR-1-T pin-compatible with other A5988 variants, and what are the key layout considerations?

Yes, the A5988GEVTR-1-T is fully pin-compatible with A5988GEVTR-T and all EV-package A5988 variants - same 36-pin QFN footprint, thermal pad, and signal assignments. Critical layout requirements include: (1) star-ground connection under the thermal pad linking GND, PGND, and pad; (2) 0.1 µF ceramic capacitors placed <2 mm from CP1–CP2 and VCP–VBB pins; (3) sense resistors (RSx) routed with minimal trace length to SENSEx pins and direct low-impedance path to star ground. These practices ensure stable charge pump operation and accurate current regulation in the A5988GEVTR-1-T.

A5988GEVTR-1-T Specifications

Product attributes: Attribute value

Manufacturer:: Allegro MicroSystems

Series:: -

Package/Case:: 36-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Motor Type - Stepper:: Bipolar

Motor Type - AC, DC:: Brushed DC

Function:: Driver - Fully Integrated, Control and Power Stage

Output Configuration:: Half Bridge (8)

Interface:: PWM

Technology:: DMOS

Step Resolution:: 1, 1/2, 1/4

Applications:: General Purpose

Current - Output:: 1.6A

Voltage - Supply:: 8V ~ 40V

Voltage - Load:: 8V ~ 40V

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 36-QFN (6x6)

A5988GEVTR-1-T FAQ

1.How can I place an order for A5988GEVTR-1-T through Aetrix?

Please submit a Request for Quotation (RFQ) for A5988GEVTR-1-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for A5988GEVTR-1-T reliable?

The price and inventory of A5988GEVTR-1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A5988GEVTR-1-T is usually 5 days.

3.What payment methods are accepted for A5988GEVTR-1-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A5988GEVTR-1-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for A5988GEVTR-1-T?

A5988GEVTR-1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your A5988GEVTR-1-T order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for A5988GEVTR-1-T?

For technical support, including A5988GEVTR-1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A5988GEVTR-1-T requirements.

6.How does Aetrix verify that A5988GEVTR-1-T is sourced from the original manufacturer or authorized distributors?

All A5988GEVTR-1-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that A5988GEVTR-1-T meets industry standards.

7.What is the process for return or replacement of A5988GEVTR-1-T?

All A5988GEVTR-1-T units undergo pre-shipment inspection (PSI). If there is an issue with A5988GEVTR-1-T, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The A5988GEVTR-1-T part is unused and in its original packaging.

Return procedure for A5988GEVTR-1-T:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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