LP3907 Datasheet, PDF (31/44 Pages) National Semiconductor (TI) – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface

BUCK1 TARGET VOLTAGE 1 REGISTER (B1TV1) – 0X23
This register allows the user to program the output target volt-
age of Buck1.
D7-5
D4-0
Name
—
BK1_VOUT1
Access
—
R/W
Data
Reserved
Buck1 Output Voltage (V)
5’h00
Ext Ctrl
5’h01
0.80
5’h02
0.85
5’h03
0.90
5’h04
0.95
5’h05
1.00
5’h06
1.05
5’h07
1.10
5’h08
1.15
5’h09
1.20
5’h0A
1.25
5’h0B
1.30
5’h0C
1.35
5’h0D
1.40
5’h0E
1.45
5’h0F
1.50
5’h10
1.55
5’h11
1.60
5’h12
1.65
5’h13
1.70
5’h14
1.75
5’h15
1.80
5’h16
1.85
5’h17
1.90
5’h18
1.95
5’h19
2.00
5’h1A–5’h1F
2.00
Reset
000
01001
* If using Ext Ctrl, contact National Sales for support.
BUCK1 TARGET VOLTAGE 2 REGISTER (B1TV2) – 0X24
This register allows the user to program the output target volt-
age of Buck1.
D7-5
D4-0
Name
—
BK1_VOUT2
Access
—
R/W
Data
Reserved
Buck1 Output Voltage (V)
5’h00
Ext Ctrl
5’h01
0.80
5’h02
0.85
5’h03
0.90
5’h04
0.95
5’h05
1.00
5’h06
1.05
5’h07
1.10
5’h08
1.15
5’h09
1.20
5’h0A
1.25
5’h0B
1.30
5’h0C
1.35
5’h0D
1.40
5’h0E
1.45
5’h0F
1.50
5’h10
1.55
5’h11
1.60
5’h12
1.65
5’h13
1.70
5’h14
1.75
5’h15
1.80
5’h16
1.85
5’h17
1.90
5’h18
1.95
5’h19
2.00
5’h1A–5’h1F
2.00
Reset
000
01001
31
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