LP3907SQX-JXQX/NOPB National Semiconductor, LP3907SQX-JXQX/NOPB Datasheet - Page 33
![IC BUCK SYNC 1.2V/3.3V 24LLP](/photos/6/54/65470/pkg_sqa24a_sml.jpg)
LP3907SQX-JXQX/NOPB
Manufacturer Part Number
LP3907SQX-JXQX/NOPB
Description
IC BUCK SYNC 1.2V/3.3V 24LLP
Manufacturer
National Semiconductor
Series
PowerWise®r
Type
Step-Down (Buck)r
Datasheet
1.LP3907SQ-JXQXNOPB.pdf
(46 pages)
Specifications of LP3907SQX-JXQX/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
2.6V, 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
For Use With
LP3907SQ-JXQXEV - LP3907 EVALUATION BOARD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LP3907SQX-JXQX
BUCK1 TARGET VOLTAGE 1 REGISTER (B1TV1) – 0X23
This register allows the user to program the output target volt-
age of Buck1.
* If using Ext Ctrl, contact National Sales for support.
Name
Access
Data
Reset
Reserved
D7-5
000
—
—
Factory-Programmed Default
5’h1A–5’h1F
Buck1 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
BK1_VOUT1
D4-0
R/W
Ext Ctrl
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.00
33
BUCK1 TARGET VOLTAGE 2 REGISTER (B1TV2) – 0X24
This register allows the user to program the output target volt-
age of Buck1.
Name
Access
Data
Reset
Reserved
D7-5
000
—
—
Factory-Programmed Default
5’h1A–5’h1F
Buck1 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
BK1_VOUT2
D4-0
R/W
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Ext Ctrl
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.00