TMC2225 DATASHEET (Rev. 1.15 / 2023-FEB-16)
12
3.3 5V Only Supply
Place near IC with
short path to die pad
10µ
6.3V
10R
Optional – bridges the
internal 5V reference
Step and Direction
motion control
TMC2225
STEP
DIR
Step&Dir input
Configuration
(GND/open or VCC_IO)
optional UART interface
MS1
MS2
SPREAD
(only TMC222x)
PDN/UART
Driver error
Index pulse
opt. ext. clock
10-16MHz
3.3V or 5V
I/O voltage
DIAG
INDEX
(not with TMC2202)
CLK_IN
VCC_IO
100n
Step Pulse
Generator
Configuration
Memory (OTP)
Configuration
Interface
B. Dwersteg, ©
TRINAMIC 2016
UART interface
+ Register Block
Programmable
Diagnostic
Outputs
Trimmed
CLK oscillator/
selector
5V Voltage
regulator
Stand Still
Current
Reduction
Analog Scaling
VREF IREF
256 Microstep
Sequencer
stealthChop2
Driver
spreadCycle
22n
50V
charge pump
Full Bridge A
100n
16V
VS
4.7-5.4V
100n
100n
100µF
Low ESR type
OA1
OA2
N
S
stepper
motor
BRA RSA
Integrated IREF
Rsense
Full Bridge B
Connect directly
to GND plane
Use low inductivity SMD
type, e.g. 1206, 0.5W for
RSA and RSB
OB1
OB2
BRB RSB
Connect directly
to GND plane
Figure 3.3 5V only operation
opt. driver enable
While the standard application circuit is limited to roughly 5.2 V lower supply voltage, a 5 V only
application lets the IC run from a 5 V +/-5% supply. In this application, linear regulator drop must be
minimized. Therefore, the internal 5V regulator is filtered with a higher capacitance. An optional
resistor bridges the internal 5V regulator by connecting 5VOUT to the external power supply. This RC
filter keeps chopper ripple away from 5VOUT. With this resistor, the external supply is the reference
for the absolute motor current and must not exceed 5.5V.
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