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LP3906 데이터시트(PDF) 33 Page - Texas Instruments

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부품명 LP3906
상세설명  Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C ompatible
PDF  47 Pages
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제조업체  TI [Texas Instruments]
홈페이지  http://www.ti.com
Logo TI - Texas Instruments

LP3906 데이터시트(HTML) 33 Page - Texas Instruments

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2 MHz
Time
Spread Spectrum
frequency
10 kHz triangle
wave
Peak frequency deviation
2 kHz triangle
wave
LP3906
www.ti.com
SNVS456M – AUGUST 2006 – REVISED MAY 2013
BUCK 2 RAMP CONTROL REGISTER (B2RC) - 0x2B
This register allows the user to program the rate of change between the target voltages of Buck 2
D7
D6-4
D3-0
Name
- - - -
- - - -
B2RS
Access
- - - -
- - - -
R/W
Data
Reserved
Reserved
Data Code
Ramp Rate mV/us
4h'0
Instant
4h'1
1
4h'2
2
4h'3
3
4h'4
4
4h'5
5
4h'6
6
4h'7
7
4h'8
8
4h'9
9
4h'A
10
4h'B - 4h'F
10
Reset
0
010
1000
BUCK FUNCTION REGISTER (BFCR) – 0x38
This register allows the Buck switcher clock frequency to be spread across a wider range, allowing for less
Electro-magnetic Interference (EMI). The spread spectrum modulation frequency refers to the rate at which the
frequency ramps up and down, centered at 2 MHz.
D7-2
D1
D0
Name
—
BK_SLOMOD
BK_SSEN
Access
—
R/W
R/W
Data
Reserved
Buck Spread Spectrum Modulation
Spread Spectrum Function Output
0 – 10 kHz triangular wave
0 – Disabled
1 – 2 kHz triangular wave
1 – Enabled
Reset
000010
1
0
Copyright © 2006–2013, Texas Instruments Incorporated
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