A3979SLP Allegro Microsystems Inc, A3979SLP Datasheet - Page 5

• Manufacturer Part Number: A3979SLP
• Description: IC DRIVER MICROSTEPPING 28-TSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3979SLP

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±2.5A
• Voltage - Load: 8 V ~ 35 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Operating Current: 12mA
• Operating Temperature Classification: Commercial
• Package Type: TSSOP EP
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3979
1
individual units, within the specified maximum and minimum limits.
2
3
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
ELECTRICAL CHARACTERISTICS, continued
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
UVLO Enable Threshold
UVLO Hysteresis
Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for
Negative current is defined as coming out of (sourcing from) the specified device pin.
E
*Additional thermal information available on Allegro Web site.
G
Package Thermal Resistance
= ( [ V
REF
Characteristics
Characteristic
/ 8] – V
SENSE
) / ( V
REF
/ 8 ).
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
V
Symbol
T
Symbol
UVLOHYS
V
JSDHYS
T
20
R
UVLO
DMOS Microstepping Driver with Translator
JSD
θJA
40
Increasing V
Maximum Power Dissipation, P
Two-layer PCB with 3.8 in.
connected with thermal vias and to device exposed pad
High-K PCB (multilayer with significant copper areas,
based on JEDEC standard)
60
at T
Test Conditions
Temperature (°C)
A
80
DD
= 25°C, V
100
Test Conditions*
BB
= 35 V, V
120
2
of copper area on each side
D(max)
140
DD
= 3.0 to 5.5 V (unless otherwise noted)
Min.
2.45
0.05
160
–
–
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
Typ.
0.10
165
2.7
15
1
Value
32
28
Max.
2.95
–
–
–
Units
ºC/W
ºC/W
Units
°C
°C
V
V
5