LP3907SQX-BJXIX/NOPB National Semiconductor, LP3907SQX-BJXIX/NOPB Datasheet - Page 35
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LP3907SQX-BJXIX/NOPB
Manufacturer Part Number
LP3907SQX-BJXIX/NOPB
Description
1 A&D 6A BUCK 2X 0.3A LDO
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheet
1.LP3907SQ-JXQXNOPB.pdf
(46 pages)
Specifications of LP3907SQX-BJXIX/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-WFQFN Exposed Pad
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
BUCK2 TARGET VOLTAGE 1 REGISTER (B2TV1) – 0X29
This register allows the user to program the output target volt-
age of Buck2.
*If using Ext Ctrl, contact National Sales for support.
Name
Access
Data
Reset
Reserved
D7-5
000
—
—
5’h1A–5’h1F
Factory-Programmed Default
Buck2 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
BK2_VOUT1
D4-0
R/W
Ext Ctrl
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
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.5
35
BUCK2 TARGET VOLTAGE 2 REGISTER (B2TV2) – 0X2A
This register allows the user to program the output target volt-
age of Buck2.
Name
Access
Data
Reset
Reserved
D7-5
000
—
—
5’h1A–5’h1F
Factory-Programmed Default
Buck2 Output Voltage (V)
5’h0C
5’h0D
5’h00
5’h01
5’h02
5’h03
5’h04
5’h05
5’h06
5’h07
5’h08
5’h09
5’h0A
5’h0B
5’h0E
5’h0F
5’h10
5’h11
5’h12
5’h13
5’h14
5’h15
5’h16
5’h17
5’h18
5’h19
BK2_VOUT2
D4-0
R/W
Ext Ctrl
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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
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.5