LP3906SQ-JXXIEV National Semiconductor, LP3906SQ-JXXIEV Datasheet - Page 12

• Manufacturer Part Number: LP3906SQ-JXXIEV
• Description: BOARD EVALUATION LP3906SQ-JXXI
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3906SQ-JXXIEV

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 4, Non-Isolated
• Current - Output: 1.5A, 1.5A, 300mA, 300mA
• Regulator Topology: Buck
• Frequency - Switching: 2MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LP3906
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -
• Voltage - Input: -
• Power - Output: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

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JUMPER
JP 1-6
JP 7-8
JP50
USBPOWE
R
SDA, SCL
*ADC
PURPOSE
These jumpers connect different Vins to the
system VDD (VDD_M)
JP1 connects Vin1 to VDD_M
JP2 connects Vin2 to VDD_M
JP3 connects the Buck core VDD to VDD_M
JP4 connects VINLDO1 to VDD_M
JP5 connects VINLDO12 to VDD_M
JP6 connects VINLDO2 to VDD_M
These jumpers connect the output of LDO1
and LDO2 to GND
JP7 connects LDO2 to GND
JP8 connects LDO1 to GND
This jumper connects the GND of the USB
interface with GND_M
This jumper allows the USB to power the
board
These jumpers allow the GUI to interface
with the chip.
These jumpers connect outputs of various
regulators to the ADCs of the USB
Table 2. Jumper Settings
NOTE
JP1 and JP2 allow the bucks to be powered from the system power.
JP4 and JP6 allow the LDOs to be powered from the system power.
JP3 and JP5 powers the internal bias and error amplifiers from the
system power.
The voltage applied to AVDD and VINLDO12 should be in the range
of 2.7 – 5.5V.
These jumpers are used to connect the output of the respective LDOs
to GND for short circuit testing purposes.
Enable pin logic input: Low = shutdown, High = normal operation. This
pin should not be left floating. Short to V
normal operation.
This jumper should be disconnected if powering from an external
power supply.
It should be set to 5.0V if powering from the USB.
Connect these jumpers for the GUI to work.
Needs to be jumpered to measure the voltages of different regulators
from the GUI.
12
IN
using attached jumper for