1 Features
1• 4-Channel Protected Low-Side Driver
– Four NMOS FETs With Overcurrent Protection
– Integrated Inductive Clamp Diodes
• Indexer/Translator for Unipolar Stepper Motors
– Simple Step/Direction Interface
– Three Step Modes (2-Phase Full-Step, 1-2-
Phase Half-Step, 1-Phase Wave Drive)
• DW Package: 1.5-A (Single Channel On) /
800-mA (Four Channels On) Maximum Drive
Current per Channel (at 25°C)
• PWP Package: 2-A (Single Channel On) /
1-A (Four Channels On) Maximum Drive Current
per Channel (at 25°C, With Proper PCB
Heatsinking)
• 8.2-V to 60-V Operating Supply Voltage Range
• Thermally Enhanced Surface Mount Package

2 Applications
• Gaming Machines
• General Unipolar Stepper Motor Drivers

3 Description
The DRV8805 provides an integrated solution for
driving unipolar stepper motors. It includes four lowside
drivers with overcurrent protection and provides
built-in diodes to clamp turnoff transients generated
by the motor windings.
Indexer logic to control a unipolar stepper motor
using a simple step/direction interface is also
integrated. Three stepping modes are supported: 2
phase (full-step), 1-2 phase (half-step), and 1-phase
(wave drive).
In the SOIC (DW) package, the DRV8805 can supply
up to 1.5-A (one channel on) or 800-mA (all channels
on) continuous output current per channel, at 25°C. In
the HTSSOP (PWP) package, it can supply up to 2-A
(one channel on) or 1-A (four channels on)
continuous output current per channel, at 25°C with
proper PCB heatsinking.
Internal shutdown functions are provided for
overcurrent protection, short-circuit protection, under
voltage lockout, and overtemperature, and faults are
indicated by a fault output pin.
The DRV8805 is available in a 20-pin thermallyenhanced
SOIC package and a 16-pin HTSSOP
package (Eco-friendly: RoHS & no Sb/Br).