A8450KLB Allegro Microsystems Inc, A8450KLB Datasheet - Page 5

• Manufacturer Part Number: A8450KLB
• Description: IC REG MULTI-OUT AUTO 24-SOIC
• Manufacturer: Allegro Microsystems Inc
• Type: Step-Down (Buck)r

Specifications of A8450KLB

• Topology: Step-Down (Buck) (1), Linear (LDO) (4)
• Function: Automotive
• Number Of Outputs: 4
• Voltage/current - Output 1: 5.7V, 1.2A
• Voltage/current - Output 2: 5V, 200mA
• Voltage/current - Output 3: 5V, 200mA
• W/led Driver: No
• W/supervisor: No
• W/sequencer: Yes
• Voltage - Supply: 6 V ~ 45 V
• Operating Temperature: -40°C ~ 135°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Current - Output: 200mA, 550mA
• Voltage - Output: 3.3V, 5V, 5.7V, Adj
• Voltage - Input: 6 ~ 45 V
• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -

A8450
ELECTRICAL CHARACTERISTICS (continued)
otherwise noted
Protection
NFAULT, NPOR Output Voltage
NFAULT, NPOR Leakage Current
POR Delay
V33 Undervoltage Threshold
V33 Hysteresis
V5A, V5D Undervoltage Threshold
V5A, V5D Hysteresis
VADJ Undervoltage Threshold
VADJ Hysteresis
VADJ, V33 Overcurrent Threshold
VREG Undervoltage Threshold
Thermal Warning Threshold
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
*
Linear regulator output specifications are only valid when V
Characteristics
*In still air; mounted on PCB based on JEDEC high-conductance standard PCB
(JESD51-7; High Effective Thermal Conductivity Test Board for Leaded Surface Mount
Packages); data on other PCB types is provided on the Allegro Web site.
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
20
Power Dissipation Versus Ambient Temperature
V
V
V
V
V
T
UVLOVREG
Symbol
V
I
V
UVLOVADJ
V
ERROFF
UVLOV33
HYSVADJ
T
HYSTSD
UVLOV5
HYSV33
T
ERRON
40
t
V
HYSV5
POR
Automotive Multioutput Voltage Regulator
JTSD
JTW
OC
REG
60
Ambient Temperature (°C)
is in regulation (V
Fault asserted;
I
V
C9 = 0.47 μF
V
V
V5A, V5D rising
V5A, V5D falling
V
V
At FB pin
T
T
Recovery period = T
NFAULT
J
J
at T
NFAULT
33
33
FB
FB
rising
rising
rising
falling
80
rising
falling
A
, I
= –40ºC to 135°C, V
, V
NPOR
Test Conditions
NPOR
100
BB
4-Layer PCB*
(R
= 1 mA
= 5 V
θJA
≥ 6.5).
= 35 ºC/W)
120
JTSD
– T
BB
140
JTW
= 6 to 45 V, V
160
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Min.
2.80
2.75
4.36
4.24
1.02
0.97
4.94
175
65
–
–
–
–
–
–
–
–
ENB
2.95
2.90
4.50
4.38
1.07
1.02
5.15
Typ.
100
125
200
160
175
= 5 V, unless
80
70
15
–
–
Max.
3.10
3.05
4.75
4.63
1.12
1.07
5.36
400
135
225
1
–
–
–
–
–
–
Units
mV
mV
mV
mV
mV
ms
μA
°C
°C
°C
V
V
V
V
V
V
V
5