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A4988

DMOS Microstepping Driver with Translator and Overcurrent Protection / 28-contact QFN

Allegro MicroSystems 

A4988

DMOS Microstepping Driver with Translator

And Overcurrent Protection

Description (continued)

Internal synchronous rectification control circuitry is provided

to improve power dissipation during PWM operation. Internal

circuit protection includes: thermal shutdown with hysteresis,

undervoltage lockout (UVLO), and crossover-current protection.

Special power-on sequencing is not required.

The A4988 is supplied in a surface mount QFN package (ES), 5 mm

× 5 mm, with a nominal overall package height of 0.90 mm and an

exposed pad for enhanced thermal dissipation. It is lead (Pb) free

(suffix –T), with 100% matte tin plated leadframes.

Selection Guide

Part Number

Package

A4988SETTR-T

28-contact QFN with exposed thermal pad

Packing

1500 pieces per 7-in. reel

Absolute Maximum Ratings

Characteristic

Load Supply Voltage

Output Current

Logic Input Voltage

Logic Supply Voltage

Motor Outputs Voltage

Sense Voltage

Reference Voltage

Operating Ambient Temperature

Maximum Junction

Storage Temperature

Symbol

VBB

IOUT

VIN

VDD

VSENSE

VREF

TA

TJ(max)

Tstg

Range S

Notes

Rating

35

±2

–0.3 to 5.5

–0.3 to 5.5

–2.0 to 37

–0.5 to 0.5

5.5

–20 to 85

150

–55 to 150

Units

V

A

V

V

V

V

V

ºC

ºC

ºC

Allegro MicroSystems, LLC

2

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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