Texas Instruments Power Management Unit for Advanced Application Processors LP3972SQ-I514EV/NOPB LP3972SQ-I514EV/NOPB Ficha De Dados
Códigos do produto
LP3972SQ-I514EV/NOPB
Pin Description 5 × 5 Package
5
Pin Description 5 × 5 Package
Pin #
Name
I/O
(1)
Type
(1)
Description
1
PKEY
I
D
CPU Wakeup Input
2
nTJ
I
D
CPU Wakeup Input
3
SP
I
D
CPU Wakeup Input
4
EXT_WAKEUP
O
D
CPU Wakeup Input
5
FB1, Feedback Buck1
I
A
Buck 1 Feedback
6
V
IN
1 = V
BATT
I
P
Battery Input for Powering Internal
Circuits and LDO1-3
Circuits and LDO1-3
7
LDO_V
OUT
_1
O
P
LDO1 Output
8
LDO_V
OUT
_2
O
P
LDO2 Output
9
nRST In
I
D
Chip Reset Input
10
LDO GND 1
G
G
Ground
11
LDO V
REF
Bypass
O
A
Bypass Capacitor for Reference
12
LDO_V
OUT
_3
O
P
LDO3 Output
13
LDO_V
OUT
_4
O
P
LDO4 Output
14
V
IN
LDO_4
I
P
Input Power for LDO4
15
Back-Up Battery V
IN
I
P
Back Up Battery Input
16
LDO_V
OUT
_0 (RTC)
O
P
LDO_RTC Output
17
nBatt_FLT
O
D
Main Battery Fault Output
18
PGND Buck2
G
G
Ground
19
V
OUT
Buck2
O
P
Buck Switcher2 Output
20
V
IN
Buck2
I
P
Buck Switcher 2 Battery Input
21
SDA
I/O
D
I
2
C Data Line
22
SCL
I
D
I
2
C Clock Input
23
FB2, Feedback Buck2
I
A
Buck Switcher 2 Feedback
24
nRST Out
O
D
Reset Output
25
LDO_V
OUT
_5
O
P
LDO5 Output
26
V
IN
2 (LDO 5 Only)
I
P
Battery Input Power for LDO5
27
VDDA
I
P
Analog Power Input
28
FB3, Feedback Buck3
I
A
Buck Switcher 3 Feedback
29
GPIO1/nCHG_EN
I/O
D
General Purpose I/O #1/BUBATT
Charger EN
Charger EN
30
GPIO2
I/O
D
General Purpose I/O #2
31
V
IN
Buck3
I
P
Buck Switcher 3 Battery Input
32
V
OUT
Buck3
I
P
Buck Switcher 2 Output
33
PGND Buck3
G
G
Buck3 NMOS Power Ground
34
Buck 1 2 & 3 AVSS/NCHBLK
G
G
Buck1, 2, 3 Analog Ground
35
SYNC (Buck Clock input)
I
D
Buck Switcher External Clock Input
36
Sys_En
I
D
Power Domain Enable
37
Pwr_En
I
D
Power Domain Enable
38
PGND Buck1
G
G
Buck1 NMOS Power Ground
39
V
OUT
Buck1
O
P
Buck Switcher 1 Output
40
V
IN
Buck1
I
P
Buck Switcher 1 Battery Input
(1)
A: Analog Pin; D: Digital Pin; G: Ground Pin; I: Input Pin; I/O: Input/Output; O: Output Pin; P: Power Pin
3
SNVA235A – May 2007 – Revised April 2013
AN-1621 LP3972 USB Evaluation Board Rev B
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