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LP3972 数据表(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LP3972
功能描述  Power Management Unit for Advanced Application Processors
PDF  59 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LP3972 数据表(HTML) 7 Page - National Semiconductor (TI)

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Pin Descriptions (Continued)
Pin #
Name
I/O
Type
Description
32
SW3
O
PWR
Buck3 switcher output
33
PGND3
G
G
Buck3 NMOS Power Ground
34
BGND1,2,3
G
G
Bucks 1, 2 and 3 analog Ground
35
SYNC
I
D
Frequency Synchronization: Connection to an external clock signal
PLL to synchronize the PMIC internal oscillator.
36
SYS_EN
I
D
Input Digital enable pin for the high voltage power domain supplies.
Output from the Monahans processor.
37
PWR_EN
I
D
Digital enable pin for the Low Voltage domain supplies. Output
signal from the Monahans processor
38
PGND1
G
G
Buck1 NMOS Power Ground
39
SW1
O
PWR
Buck1 Switcher output
40
VIN Buck1
I
PWR
Battery input power to Buck1
A: Analog Pin D: Digital Pin G: Ground Pin P: Power Pin I: Input Pin I/O: Input/Output Pin O: Output Pin
Note: In this document active low logic items are prefixed with a lowercase “n”
www.national.com
7



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