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DRV8889-Q1 Datasheet(PDF) 32 Page - Texas Instruments

Part No. DRV8889-Q1
Description  DRV8889-Q1, DRV8889A-Q1 Automotive Stepper Driver with Integrated Current Sense, 1/256 Micro-Stepping, and Stall Detection
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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DRV8889-Q1 Datasheet(HTML) 32 Page - Texas Instruments

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7.3.9 Linear Voltage Regulators
A linear voltage regulator is integrated into the device. The DVDD regulator can be used to provide a reference
voltage. DVDD can supply a maximum of 2 mA load. For proper operation, bypass the DVDD pin to GND using
a ceramic capacitor.
The DVDD output is nominally 5-V. When the DVDD LDO current load exceeds 2 mA, the output voltage drops
significantly.
Figure 7-15. Linear Voltage Regulator Block Diagram
If logic level inputs must be tied permanently high, tying the input to the DVDD pin instead of an external
regulator is preferred. This method saves power when the VM pin is not applied or in sleep mode: the DVDD
regulator is disabled and current does not flow through the input pulldown resistors. For reference, logic level
inputs have a typical pulldown of 200 kΩ.
The nSLEEP pin cannot be tied to DVDD, else the device will never exit sleep mode.
7.3.10 Logic Level Pin Diagrams
Figure 7-16 shows the input structure for the logic-level pins STEP, DIR, nSLEEP, SDI, and SCLK.
Figure 7-16. Logic-Level Input Pin Diagram
Figure 7-17 shows the input structure for the logic-level pins DRVOFF, and nSCS.
DRV8889-Q1
SLVSEE9C – APRIL 2020 – REVISED AUGUST 2020
www.ti.com
32
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Product Folder Links: DRV8889-Q1


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