LP3907SQX-PJXIX/NOPB National Semiconductor, LP3907SQX-PJXIX/NOPB Datasheet - Page 38

• Manufacturer Part Number: LP3907SQX-PJXIX/NOPB
• Description: IC BUCK SYNC 1.2V/3.3V 24LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LP3907SQX-PJXIX/NOPB

• Topology: Step-Down (Buck) Synchronous (2), Linear (LDO) (2)
• Function: Any Function
• Number Of Outputs: 4
• Frequency - Switching: 2.1MHz
• Voltage/current - Output 1: 1.2V, 1A
• Voltage/current - Output 2: 3.3V, 600mA
• Voltage/current - Output 3: 1.8V, 300mA
• W/led Driver: No
• W/supervisor: No
• W/sequencer: Yes
• Voltage - Supply: 2.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-LLP
• Current - Output: 300mA, 600mA, 1A
• Voltage - Output: 1.2V, 3.3V
• Voltage - Input: 2.8 ~ 5.5 V
• Power - Output: 1.43W
• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP3907SQX-PJXIX

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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