A8450KLB Allegro Microsystems Inc, A8450KLB Datasheet - Page 3

• 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
C1, C2, C3, C4
COUT
CIN
C7, C8
C10
D1, D2
L1
Q1, Q2 pass transistors
Voltage
Switch
High
VREG11
NFAULT
ENBAT
CPOR
NPOR
ID
C10
GND
ENB
C9
POR Block
Charge Pump
Adjustable
Protection
CP1
High V
Delay
C8
1 μF, 25 V ceramic X7R
100 μF, 35 V low-ESR electrolytic
47 μF, 63 V electrolytic
0.1 μF, 50 V ceramic X7R (for 14 V applications), or
0.1 μF, 100 V ceramic X7R (for 42 V applications)
0.22 μF, 10 V X7R
1 A, 40 V Schottky (for 14 V applications)
100 μH, 1.2 A
npn transistor, h
CP2
CPOK
Fault
VCP
C7
Soft Start
V
V
V
UVLOREG
UVLOADJ
UVLO33
TSD Warning
V5A Short to Supply
UVLO V5D, V5A
Functional Block Diagram
FE
Automotive Multioutput Voltage Regulator
VBB
VBB
> 50
Reference
Internal
Characteristics
Buck Converter with
Switching Regulator
VREG
CIN
D2
Current
Limiting
VREG
V
REF
VIN
Linear Regulator
Tracking Control
and V5D to V5A
5 V Digital Linear
5V Analog
LX
Regulator
Short-to-Supply
Regulator Control
Adjustable Linear
Regulator Control
1.2 V to 3.3 V
Protection
3.3 V Linear
D1
L1
UHC1V101M, Nichicon
EKO4, Sanken
D03316HT, Coilcraft
MPSW06
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
VREG
CL33
V33BD
V33
CLADJ
V5D
V5A
VADJBD
FB
COUT
Representative Device
R2
C1
C2
Q1
R1
R3
C3
Q2
R4
VADJ
C4
3