A8287SLB-T View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A8287SLB-T' PDF : 17 Pages View PDF
A8285/A8287
LNB Supply and Control Voltage Regulator
PCB Layout Diagram
Control 0V
Switcher 0V
VIN
0V (INPUT)
Note that to add additional connec-
tions, e.g. SCL, SDA, IRQ, VIN,
EXTM, ADD, TDO, and TDI,
some modifications to the control
ground plane will be necessary.
Refer to Functional Block diagram
for circuit connections.
C2
1
2
3
4
5
6
C3 7
8
9
10
11
12
C4
+
C8
C9
+
C1
C5
24
23
22 D1
21 +
20
19
18
17
16
15
D2
+
14
13
L1
Control 0V
C6
Control 0V
Tracking
0V Plane
Thermal Via
Cut in 0V Plane
R1
L2
OUTPUT
C7
0V
Power-on Reset I2C Sequence
VIN
VREG
IRQ
SDA
S
T
ADR
RA
READ
Master Responds to IRQ
Reads Status
VUV = 1
A READ
VUV = 0
N
S
P
S
T
ADR
WA
Master Writes
Enables output
WRITE
A
S
P
VUV
reset
13
www.allegromicro.com
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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