LP3907SQ-JXQXEV National Semiconductor, LP3907SQ-JXQXEV Datasheet - Page 38

• 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: -

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LDO1 CONTROL REGISTER (LDO1VCR) – 0X39
This register allows the user to program the output target volt-
age of LDO 1.
For “JJ11” voltage options LDO1 has a fixed output voltage
of 2.85V.
Name
Access
Data
Reset
Reserved
D7-5
000
—
—
5’h1A–5’h1F
Factory-Programmed Default
LDO1 Output voltage (V)
5’h0C
5’h0D
5’h0A
5’h0B
5’h0E
5’h0F
5’h00
5’h01
5’h02
5’h03
5’h04
5’h05
5’h06
5’h07
5’h08
5’h09
5’h10
5’h11
5’h12
5’h13
5’h14
5’h15
5’h16
5’h17
5’h18
5’h19
LDO1_OUT
D4-0
R/W
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.5
38
LDO2 CONTROL REGISTER (LDO2VCR) – 0X3A
This register allows the user to program the output target volt-
age of LDO 2.
For “JJ11” voltage options LDO2 has a fixed output voltage
of 2.85V.
Name
Access
Data
Reset
Reserved
D7-5
000
—
—
5’h1A–5’h1F
Factory-Programmed Default
LDO2 Output voltage (V)
5’h0A
5’h0B
5’h0C
5’h0D
5’h0E
5’h00
5’h01
5’h02
5’h03
5’h04
5’h05
5’h06
5’h07
5’h08
5’h09
5’h0F
5’h10
5’h11
5’h12
5’h13
5’h14
5’h15
5’h16
5’h17
5’h18
5’h19
LDO2_OUT
D4-0
R/W
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.5