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UP9512 Datasheet(PDF) 12 Page - uPI Group Inc.

Part # UP9512
Description  8/7/6/5/4/3/2/1-Phase Synchronous-Rectified Buck Controller with SMBus Digital Interface
PDF  31 Pages
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Manufacturer  UPI [uPI Group Inc.]
Direct Link  http://www.ubiq-semi.com/
Logo UPI - uPI Group Inc.

UP9512 Datasheet(HTML) 12 Page - uPI Group Inc.

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uP9512
12
uP9512-DS-F0001, Dec. 2018
www.upi-semi.com
Functional Description
Cold Boot and Warm Boot
The uP9512 features programmable operation phase
number of Cold Boot Mode and Warm Boot Mode. When
PSI=Low and uP9512 first boots up (first time of 5VCC and
EN goes high), controller will enter to Cold Boot Mode.
Exclude the first boot up condition, when PSI=Low state
and controller power up by EN control, then uP9512 will
enter to Warm Boot Mode. Connect LPC pin to 5VCC with
a voltage divider (Figure 10) to set the operation phase
number of Cold Boot Mode and Warm Boot Mode. Figure
11 shows all the power states of uP9512 under each
combination of 5VCC/EN/ PSI/VID signal. Table 6 shows
the recommended resistance of the voltage divider.
Table 6. Recommended Resistance of Cold Boot Mode and Warm Boot Mode
V
C
P
L
f
o
%
=
C
C
V
5
t
o
o
B
d
l
o
C
t
n
u
o
C
e
s
a
h
P
k
:
t
i
n
U
(
t
n
u
o
C
e
s
a
h
P
t
o
o
B
m
r
a
W
Ω)
e
s
a
h
p
-
1e
s
a
h
p
-
2e
s
a
h
p
-
3e
s
a
h
p
-
4e
s
a
h
p
-
5
R
P
O
T
R
T
O
B
R
P
O
T
R
T
O
B
R
P
O
T
R
T
O
B
R
P
O
T
R
T
O
B
R
P
O
T
R
T
O
B
%
3
6
.
0
4e
s
a
h
p
-
12
9
.
47
3
.
31
6
.
4
24
8
.
6
13
.
4
42
3
.
0
34
8
.
3
73
5
.
0
57
6
.
7
4
16
0
.
1
0
1
%
8
8
.
6
4e
s
a
h
p
-
27
2
.
47
7
.
33
3
.
1
23
8
.
8
14
.
8
39
8
.
3
39
9
.
3
68
4
.
6
59
9
.
7
2
15
9
.
2
1
1
%
3
1
.
3
5e
s
a
h
p
-
36
7
.
37
2
.
42
8
.
8
14
3
.
1
28
8
.
3
34
.
8
37
4
.
6
51
0
.
4
63
9
.
2
1
1
1
0
.
8
2
1
%
8
3
.
9
5e
s
a
h
p
-
47
3
.
32
9
.
44
8
.
6
12
6
.
4
21
3
.
0
31
3
.
4
42
5
.
0
56
8
.
3
74
0
.
1
0
1
1
7
.
7
4
1
%
3
6
.
5
6e
s
a
h
p
-
55
0
.
32
8
.
54
2
.
5
11
.
9
23
4
.
7
27
3
.
2
51
7
.
5
49
2
.
7
82
4
.
1
97
5
.
4
7
1
%
8
8
.
1
7e
s
a
h
p
-
68
7
.
21
1
.
71
9
.
3
16
5
.
5
34
0
.
5
21
0
.
4
64
7
.
1
49
6
.
6
0
17
4
.
3
87
3
.
3
1
2
%
3
1
.
8
7e
s
a
h
p
-
76
5
.
24
1
.
98
.
2
12
7
.
5
44
0
.
3
23
.
2
84
.
8
37
1
.
7
3
18
.
6
75
3
.
4
7
2
%
8
3
.
4
8e
s
a
h
p
-
87
3
.
28
.
2
15
8
.
1
12
0
.
4
63
3
.
1
24
2
.
5
1
15
5
.
5
36
0
.
2
9
11
1
.
1
72
1
.
4
8
3
OFF
Full-Phase
Cold-Boot
OFF
Warm-Boot
Full-Phase
Warm-Boot
OFF
Cold-Boot
Full-Phase
Auto-Phase
5VCC
EN
PSI
VID
High
Tri-state
Low
Figure 11. Power States of uP9512
LPC
Low Phase
Mode
5VCC
RTOP
RBOT
Figure 10. LPC Pin Connection



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