LP3906SQ-VPFP/NOPB National Semiconductor, LP3906SQ-VPFP/NOPB Datasheet - Page 5

• Manufacturer Part Number: LP3906SQ-VPFP/NOPB
• Description: IC REG DC-DC/LINEAR DUAL 24-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3906SQ-VPFP/NOPB

• Applications: Digital Cores
• Current - Supply: 60µA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-LLP
• For Use With: LP3906SQ-JXXIEV - BOARD EVALUATION LP3906SQ-JXXI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP3906SQ-VPFPTR

Pin Descriptions
A: Analog Pin D: Digital Pin G: Ground Pin PWR: Power Pin I: Input Pin I/O: Input/Output Pin O: Output Pin
DAP
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
GND_SW2
GND_SW1
Pin Name
VinLDO12
VINLDO1
VINLDO2
ENLDO1
ENLDO2
GND_C
ENSW1
ENSW2
GND_L
AVDD
SYNC
EN_T
LDO1
LDO2
VIN2
VIN1
SW2
SW1
SDA
SCL
DAP
FB1
FB2
GND
I/O
I/O
O
G
G
G
O
O
G
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Type
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
PWR
GND
G
G
G
D
D
D
D
D
G
D
D
D
A
A
5
Power in from either DC source or Battery to Buck 2
Buck2 switcher output pin
Buck2 NMOS Power Ground
Non switching core ground pin
Buck1 NMOS Power Ground
Buck1 switcher output pin
Power in from either DC source or Battery to buck 1
I
I
Enable for preset power on sequence.
Buck1 input feedback terminal
Analog Power for Buck converters.
Power in from either DC source or Battery to input terminal of
LDO1
LDO1 Output
LDO1 enable pin, a logic HIGH enables the LDO1
LDO2 enable pin, a logic HIGH enables the LDO2
LDO Ground
LDO2 Output
Power in from either DC source or battery to input terminal to
LDO2
Analog Power for Internal Functions (VREF, BIAS, I2C, Logic)
Buck2 input feedback terminal
Enable Pin for Buck1 switcher, a logic HIGH enables Buck1
Frequency Synchronization pin which allows the user to connect
an external clock signal PLL to synchronize the PMIC internal
oscillator.
Enable Pin for Buck2 switcher, a logic HIGH enables Buck2
Connection isn't necessary for electrical performance, but it is
recommended for better thermal dissipation.
2
2
C Data (Bidirectional)
C Clock
Functional Description
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