参数资料
型号: LP3906SQVPFP/NOPB
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 稳压器
英文描述: 2 A DUAL SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, QCC24
封装: 5 X 4 MM, 0.80 MM HEIGHT, LLP-24
文件页数: 36/40页
文件大小: 4197K
代理商: LP3906SQVPFP/NOPB
Pin Descriptions
Pin
Pin Name
I/O
Type
Functional Description
1
VIN2
I
PWR
Power in from either DC source or Battery to Buck 2
2
SW2
O
PWR
Buck2 switcher output pin
3
GND_SW2
G
Buck2 NMOS Power Ground
4
GND_C
G
Non switching core ground pin
5
GND_SW1
G
Buck1 NMOS Power Ground
6
SW1
O
PWR
Buck1 switcher output pin
7
VIN1
I
PWR
Power in from either DC source or Battery to buck 1
8
SDA
I/O
D
I2C Data (Bidirectional)
9
SCL
I
D
I2C Clock
10
EN_T
I
D
Enable for preset power on sequence.
11
FB1
I
A
Buck1 input feedback terminal
12
AVDD
I
PWR
Analog Power for Buck converters.
13
VINLDO1
I
PWR
Power in from either DC source or Battery to input terminal of
LDO1
14
LDO1
O
PWR
LDO1 Output
15
ENLDO1
I
D
LDO1 enable pin, a logic HIGH enables the LDO1
16
ENLDO2
I
D
LDO2 enable pin, a logic HIGH enables the LDO2
17
GND_L
G
LDO Ground
18
LDO2
O
PWR
LDO2 Output
19
VINLDO2
I
PWR
Power in from either DC source or battery to input terminal to
LDO2
20
VinLDO12
I
PWR
Analog Power for Internal Functions (VREF, BIAS, I2C, Logic)
21
FB2
I
A
Buck2 input feedback terminal
22
ENSW1
I
D
Enable Pin for Buck1 switcher, a logic HIGH enables Buck1
23
SYNC
I
D
Frequency Synchronization pin which allows the user to connect
an external clock signal PLL to synchronize the PMIC internal
oscillator.
24
ENSW2
I
D
Enable Pin for Buck2 switcher, a logic HIGH enables Buck2
DAP
GND
Connection isn't necessary for electrical performance, but it is
recommended for better thermal dissipation.
A: Analog Pin D: Digital Pin G: Ground Pin PWR: Power Pin I: Input Pin I/O: Input/Output Pin O: Output Pin
5
www.national.com
LP3906
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