LP3907_14 Datasheet, PDF (39/57 Pages) Texas Instruments – Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C-Compatible Interface

LP3907
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Access
Data
Reset
D7-2
—
Reserved
000
D4
D3
R/W
R/w
Bypass UVLO
monitoring
0 - Allow UVLO
1 - Disable UVLO
nPOR Delay Timing
00 - 50µs
01 - 50ms
10 - 100ms
11 - 200ms
Factory-Programmed
01
Default
SNVS511N – JUNE 2007 – REVISED AUGUST 2011
D1
R/W
Buck Spread Spectrum
Modulation
0 – 10 kHz triangular wave
1 – 2 kHz triangular wave
D0
R/W
Spread Spectrum
Function Output
0 – Disabled
1 – Enabled
1
0
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 2.85V.
Name
Access
Data
Reset
D7-5
—
—
Reserved
000
D4-0
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
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