LP3907 Datasheet, PDF (38/58 Pages) National Semiconductor (TI) – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface

LP3907
SNVS511S – JUNE 2007 – REVISED APRIL 2016
www.ti.com
Name
Access
Data
Reset
D7-D5
—
—
Reserved
000
D4
D3-D2
BP_UVLO
TPOR
R/W
R/w
Bypass UVLO
monitoring
0 - Allow UVLO
1 - Disable UVLO
nPOR Delay Timing
00 - 50 µs
01 - 50 ms
10 - 100 ms
11 - 200 ms
Factory-Programmed
01
Default
D1
BK_SLOMOD
R/W
Buck Spread Spectrum
Modulation
0 – 10 kHz triangular wave
1 – 2 kHz triangular wave
D0
BK_SSEN
R/W
Spread Spectrum
Function Output
0 – Disabled
1 – Enabled
1
0
8.6.1.14 LDO1 Control Register (LDO1VCR) – 0x39
This register allows the user to program the output target voltage of LDO 1.
For “JJ11” voltage options LDO1 has a fixed output voltage of 2.85 V.
Name
Access
Data
Reset
D7-D5
—
—
Reserved
000
D4-D0
LDO1_OUT
R/W
LDO1 Output voltage (V)
5’h00
1.0
5’h01
1.1
5’h02
1.2
5’h03
1.3
5’h04
1.4
5’h05
1.5
5’h06
1.6
5’h07
1.7
5’h08
1.8
5’h09
1.9
5’h0A
2.0
5’h0B
2.1
5’h0C
2.2
5’h0D
2.3
5’h0E
2.4
5’h0F
2.5
5’h10
2.6
5’h11
2.7
5’h12
2.8
5’h13
2.9
5’h14
3.0
5’h15
3.1
5’h16
3.2
5’h17
3.3
5’h18
3.4
5’h19
3.5
5’h1A–5’h1F
3.5
Factory-Programmed Default
38
Submit Documentation Feedback
Product Folder Links: LP3907
Copyright © 2007–2016, Texas Instruments Incorporated