參數(shù)資料
型號: A8450KLB
廠商: Allegro MicroSystems, Inc.
英文描述: Automotive Multioutput Voltage Regulator
中文描述: 汽車Multioutput穩(wěn)壓器
文件頁數(shù): 14/15頁
文件大?。?/td> 549K
代理商: A8450KLB
14
A8450KLB-DS, Rev. 1
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
A8450
Automotive Multioutput Voltage Regulator
Pin List Table
Name
Description
Number
VBB
Supply input
1
CP2
Charge pump capacitor, positive side
2
CP1
Charge pump capacitor, negative side
3
VCP
Charge pump output used to drive N-channel buck converter
transistor
4
VREG11
Internal reference
5
GND
Power ground
6
GND
Power ground
7
ENB
Logic control
8
CPOR
Connection for POR adjustment
9
CLADJ
Current limit for adjustable regulator
10
VADJBD
Base drive for adjustable regulator pass transistor
11
FB
Feedback for adjustable regulator
12
V5A
5 V analog regulator output
13
NPOR
Power on Reset logic output
14
NFAULT
Diagnostic output; open drain; low during fault condition
15
V5D
5 V digital regulator output
16
VREG
dc-to-dc converter supply output
17
GND
Power ground
18
GND
Power ground
19
CL33
Current limit for 3.3 V regulator
20
V33BD
Base drive for 3.3 V regulator pass transistor
21
V33
3.3 V regulator output
22
ENBAT
High voltage logic control
23
LX
Buck converter switching regulator output
24
Regulator Bypass
Some applications may not require the use of all four regula-
tors provided in the A8450. For the regulators that are not
used, the corresponding external components are not needed.
If either or both of the two 5 V regulators are not required by
the application, bypass an unused regulator by not connect-
ing its output terminal, V5D or V5A. Also, the corresponding
output capacitor, C1 or C2, is not used.
For the 3.3 V regulator and the 1.2 V to 3.3 V adjustable
regulator, if either or both are not needed, the corresponding
external components are not used. In addition, if the 3.3 V
regulator is not used, CL33 and V33 are not connected. If the
adjustable regulator is not used, CLADJ and FB are not con-
nected. However, to ensure stability of the A8450, the base
drive pin, V33BD or VADJBD, of any unused regulator must
be shorted to VREG.
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