Datasheet

TMC5031 DATASHEET (Rev. 1.11 / 2016-APR-28) 12
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3.2 5 V Only Supply
VCC_IO
TMC5031
SPI interface
CSN
SCK
SDO
SDI
reference switch
processing
REFL1 REFR1
reference switch
processing
Controller 2
5V Voltage
regulator
charge pump
VCP
22n
100n
CLK_IN
REFL2 REFR2
+5V
5VOUT
VSA
4.7µ
INT
PP
INT & position
pulse output
DRV_ENN
DRV_ENN
GNDP GND GNDA TST_MODE DIE PAD
VCC
Optional
external
clock
12-16MHz
100n
470n
Controller 1
Full Bridge A
Full Bridge B
+5V
VS
stepper
motor #1
N
S
O1A1
O1A2
BR1A
R
S1B
O1B1
O1B2
Driver 1
100n
BR1B
R
S1A
Full Bridge A
Full Bridge B
stepper
motor #2
N
S
O2A1
O2A2
BR2A
R
S2B
O2B1
O2B2
Driver 2
BR2B
R
S2A
VS
100n
+5V
100µF
CPI CPO
VCC_IO
5V
VCC_IO 3.3V
see standard
application schematic
Figure 3.3 5V only operation
While the standard application circuit is limited to roughly 5.5 V lower supply voltage, a 5 V only
application lets the IC run from a normal 5 V +/-5% supply. In this application, linear regulator drop
must be minimized. Therefore, the major 5 V load is removed by supplying VCC directly from the
external supply. In order to keep supply ripple away from the analog voltage reference, 5VOUT should
have an own filtering capacity and the 5VOUT pin does not become bridged to the 5V supply.