TMC5031 DATASHEET (Rev. 1.07 / 2013-APR-30)
7
2 Pin Assignments
2.1 Package Outline
INT
PP
1
2
36
35
34
33
32
31
30
29
28
27
26
25
CPI
CPO
3
GND
CSN
4
SCK
VCC
5
SDI
5VOUT
GNDA
VSA
TMC 5031-LA
QFN48 7mm x 7mm
0.5 pitch
6
GND
VCC_IO
SDO
GND
GND
CLK
7
8
DRV_ENN
REFL1
REFR1
REFL2
REFR2
9
10
11
12
GND
Figure 2.1 TMC5031 pin assignments.
2.2 Signal Descriptions
Pin
Number Type
Function
GND
6, 9, 10,
12, 24, 34
7
GND
Digital ground pin for IO pins and digital circuitry.
VCC_IO
VSA
3.3V or 5V I/O supply voltage pin for all digital inputs and
outputs. May be supplied from 5VOUT pin in stand-alone
operation, where no I/O voltage supply is available.
Analog high voltage supply for linear regulator and internal
references – typically supplied with driver supply voltage. Provide
100nF blocking capacitor to GND. Avoid excessive voltage ripple.
Analog GND
Output of internal 5V linear regulator, supply voltage for internal
analog circuitry and reference for coil current regulators. An
external capacitor to GNDA close to the pin is required. 4.7µF
ceramic are recommended to keep ripple below a few mV,
especially when used to supply VCC. Optional RC filtering can be
used to decouple VCC ripple from this pin (3.3 Ω recommended).
Digital core power supply. Normally supplied by 5VOUT pin. In
case, a different 5V supply is used, or RC-filtering is applied,
provide a 470nF or larger blocking capacitor to GND.
30
GNDA
5VOUT
31
32
GND
VCC
33
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