3977
MICROSTEPPING DMOS DRIVER
WITH TRANSLATOR
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C, V
BB
= 35 V, V
DD
= 3.0 V to 5.5V (unless otherwise
noted)
Limits
Characteristic
Output Drivers
Load Supply Voltage Range
V
BB
Operating
During sleep mode
Output Leakage Current
I
DSS
V
OUT
= V
BB
V
OUT
= 0 V
Output On Resistance
r
DS(on)
Source driver, I
OUT
= -2.5 A
Sink driver, I
OUT
= 2.5 A
Body Diode Forward Voltage
V
F
Source diode, I
F
= -2.5 A
Sink diode, I
F
= 2.5 A
Motor Supply Current
I
BB
f
PWM
< 50 kHz
Operating, outputs disabled
Sleep mode
Control Logic
Logic Supply Voltage Range
Logic Input Voltage
V
DD
V
IN(1)
V
IN(0)
Logic Input Current
I
IN(1)
I
IN(0)
Maximum STEP Frequency
HOME Output Voltage
f
STEP
V
OH
V
OL
Blank Time
Fixed Off Time
t
BLANK
t
off
I
OH
= -200
µA
I
OL
= 200
µA
R
t
= 56 kΩ, C
t
= 680 pF
R
t
= 56 kΩ, C
t
= 680 pF
V
IN
= 0.7V
DD
V
IN
= 0.3V
DD
Operating
3.0
0.7V
DD
–
-20
-20
500*
0.7V
DD
–
700
30
5.0
–
–
<1.0
<1.0
–
–
–
950
38
5.5
–
0.3V
DD
20
20
–
–
0.3V
DD
1200
46
V
V
V
µA
µA
kHz
V
V
ns
µs
8.0
0
–
–
–
–
–
–
–
–
–
–
–
<1.0
<1.0
0.45
0.36
–
–
–
–
–
35
35
20
-20
0.57
0.43
1.4
1.4
8.0
6.0
20
V
V
µA
µA
Ω
Ω
V
V
mA
mA
µA
Symbol Test Conditions
Min.
Typ.
Max.
Units
continued next page …
4
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
