A8450KLB Allegro Microsystems Inc, A8450KLB Datasheet - Page 15

• 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
Terminal List Table
VREG11
VADJBD
NFAULT
CLADJ
V33BD
ENBAT
CPOR
NPOR
VREG
Name
CL33
GND
GND
GND
GND
VBB
CP2
CP1
VCP
ENB
V5D
V5A
V33
FB
LX
Supply input
Charge pump capacitor, positive side
Charge pump capacitor, negative side
Charge pump output used to drive N-channel buck converter
transistor
Internal reference
Power ground
Power ground
Logic control
Connection for POR adjustment
Current limit for adjustable regulator
Base drive for adjustable regulator pass transistor
Feedback for adjustable regulator
5 V analog regulator output
Power on Reset logic output
Diagnostic output; open drain; low during fault condition
5 V digital regulator output
DC-to-DC converter supply output
Power ground
Power ground
Current limit for 3.3 V regulator
Base drive for 3.3 V regulator pass transistor
3.3 V regulator output
High voltage logic control
Buck converter switching regulator output
VREG11
VADJBD
Automotive Multioutput Voltage Regulator
CLADJ
CPOR
GND
GND
VBB
VCP
ENB
CP2
CP1
FB
10
12
11
1
2
3
4
5
6
7
8
9
Pin-Out Diagram
1.2 V to
Lin Reg
Control
3.3 V
Charge
Pump
Description
Converter
Buck
Start
Soft
5 V Reg
Dig/Anlg
Lin Reg
Control
Track
5 V
Lin Reg
Control
3.3 V
24
23
22
21
20
19
18
17
16
15
14
13
LX
ENBAT
V33
V33BD
CL33
GND
GND
VREG
V5D
NFAULT
NPOR
V5A
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
Number
10
12
13
14
15
16
17
18
19
20
21
22
23
24
11
1
2
3
4
5
6
7
8
9
15