lm26484sqx National Semiconductor Corporation, lm26484sqx Datasheet - Page 4

• Manufacturer Part Number: lm26484sqx
• Description: Power Management Unit
• Manufacturer: National Semiconductor Corporation

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Pin Descriptions
Pins
DAP
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
PGND_SW2
PGND_SW2
PGND_SW1
PGND_SW1
LDOGATE
ENSW1
ENSW2
ENLDO
LDOFB
AGND
Name
nPOR
AVDD
AVIN
VIN1
VIN2
VIN2
SW2
SW2
GND
SW1
SW1
VIN1
DAP
FB1
FB2
A: Analog Pin
GND
I/O
O
O
G
G
O
G
G
O
G
G
O
O
I
I
I
I
I
I
I
I
I
I
I
I
D: Digital Pin
Type
PWR
PWR
PWR
PWR
PWR
PWR
GND
D
D
G
G
D
G
G
D
G
G
A
A
A
A
A
A
A
A
Description
Power in DC source Buck1 PMOS
Enable for Buck1 switcher, a logic HIGH enables Buck1
Buck1 input feedback terminal
Analog power for internal circuits
Buck2 input feedback terminal
Enable for Buck2 switcher, a logic HIGH enables Buck2
Power in DC source Buck2 PMOS
Power in DC source Buck2 PMOS
Buck2 switcher output
Buck2 switcher output
Buck2 NMOS Power Ground
Buck2 NMOS Power Ground
Enable for LDO, a logic HIGH enables LDO
LDO Controller output to NMOS power transistor Gate
LDO Controller input to feedback terminal
Analog GND
Ground
nPOR Active low Reset output. nPOR remains LOW while the input
supply is below threshold, and goes HIGH after the threshold is
reached and timed delay
Analog Power Pin
Buck1 NMOS Power Ground
Buck1 NMOS Power Ground
Buck1 switcher output
Buck1 switcher output
Power in DC source Buck1 PMOS
Connection isn't necessary for electrical performance, but it is
recommended for better thermal dissipation.
4
G: Ground Pin
PWR: Power Pin