LP3907SQ-JXQXEV National Semiconductor, LP3907SQ-JXQXEV Datasheet - Page 3

• Manufacturer Part Number: LP3907SQ-JXQXEV
• Description: LP3907 EVALUATION BOARD
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3907SQ-JXQXEV

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 4, Non-Isolated
• Current - Output: 1A, 600mA, 300mA, 300mA
• Regulator Topology: Buck
• Frequency - Switching: 2.1MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LP3907
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -
• Voltage - Input: -
• Power - Output: -

Getting Started
Because of internal pullups, the LP3907 should become ac-
tive as soon as the USB cable is plugged in. To avoid dam-
aging any parts, be sure to read the section describing how
to power the board on page 9.
For a quick start, make sure to short (connect) all jumpers
except for JP8 & JP7 on the LP3907 Evaluation board. Those
jumpers short circuit the LDO output to GND for internal test
FIGURE 3. Starting Jumper Settings
3
purposes. Also please disregard the 4 pin USB programming
interface.
For a quick verification of a clean power up, start up the GUI,
and the interface control at the bottom should read “OK”. For
more information on powering up the LP3907 through a
charger adapter please refer to the “Powering the LP3907
Board” section in this manual or the LP3907 datasheet pro-
vided in the LP3907 Evaluation Kit CD.
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