A2550 Allegro MicroSystems, Inc., A2550 Datasheet - Page 5

• Manufacturer Part Number: A2550
• Description: Relay Driver With 5 V Regulator For Automotive Applications
• Manufacturer: Allegro MicroSystems, Inc.

ELECTRICAL CHARACTERISTICS, continued –40°C ≤ T
Watchdog and Power-On Reset
NPOR Active Voltage
NPOR Inactive Leakage Current
CWD and CPOR Trip Voltage
CPOR Charge Current
Power-On Reset Cycle Time
CWD Charge Current
Thermal Protection
Thermal Shut Down Threshold
Thermal Shut Down Hysteresis
1
2
3
4
5
A2550
See Applications Information section for operation with V
For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
When V
Defined as the maximum current level allowed during excessive load condition.
See Applications Information section for calculations. Values guaranteed by design, and depend on capacitor tolerances.
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Thermal Resistance, Junction to Pad
Thermal Resistance, Junction to
Ambient
Maximum Allowable Power Dissipation
*Additional thermal data available on the Allegro Web site.
ENBAT
Characteristics
exceeds V
Characteristic
BB
5
it is clamped with a diode. (V
I
Symbol
NPOR(Off)
V
V
T
V
T
TRIP(H)
I
TSDhys
TRIP(L)
Symbol
I
t
NPOR
CWD
POR
POR
TSD
R
R
P
θJP
θJA
D
BB
ENBAT
I
V
V
C
Charging
Discharging
NPOR
4-layer PCB based on JEDEC standard
2-layer PCB with 2 in.
R
T
R
T
J
NPOR
TRIP(H) =
POR
A
A
θJA
θJA
< 7 V. For V
≤ 150°C, V
= 125°C
= 85°C
– V
= 44 ºC/W (estimated), 2-layer PCB with 2.0 in.
= 44 ºC/W (estimated), 2-layer PCB with 2.0 in.
= 0.22 μF
= 1 mA; V
= 5 V
BB
V
REF
) ≤ 1.2 V at 40 mA.
BB
BB
Test Conditions
REG5
within operating limits, unless otherwise noted
> 24 V, thermal constraints limit regulator current.
= 1.5 V; 1.5 V ≤ V
2
Relay Driver with 5 V Regulator
copper both sides
Test Conditions*
for Automotive Applications
BB
≤ 40 V
Min.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
2.5
2.5
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
2
2
–
–
–
–
–
–
–
–
of 2 oz. copper,
of 2 oz. copper,
Typ.
175
1.2
0.2
44
70
15
–
–
5
5
Max.
400
7.5
7.5
10
–
–
–
–
–
–
Value
0.57
1.48
34
44
Units
2
mV
ms
μA
μA
μA
μA
°C
°C
V
V
Units
ºC/W
ºC/W
ºC/W
W
W
5