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參數(shù)資料
| 型號： | LP3971SQX-A514 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | POWER MANAGEMENT UNIT FOR ADVANCED APPLICATION PROCESSORS |
| 中文描述： | 3-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC40 |
| 封裝： | 5 X 5 MM, LLP-40 |
| 文件頁數(shù)： | 19/42頁 |
| 文件大?。?/td> | 1350K |
| 代理商： | LP3971SQX-A514 |
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I
2
C Register Definitions
(Continued)
Bit
1
Access
R
Name
WUPT
Description
TEST_JIG Pin Wake Up Status
0 = No wake up event
1 = Wake up event
SPARE Pin Wake Up Status
0 = No wake up event
1 = Wake up event
0
R
WUPS
SYSTEM CONTROL REGISTER 1 (SCR1) 8h’07
Bit
7
6
5
4
3
2
1
0
Designation
Reset Value
Note:
Gray denotes EPROM programmable registers for default value.
BPSEN
0
Reserved
1
SENDL
FPWM3
0
FPWM2
0
FPWM1
0
ECEN
0
0
0
SYSTEM CONTROL REGISTER 1 (SCR1) 8h’07 DEFINITIONS
Bit
7
Access
R/W
Name
BPSEN
Description
Bypass System enable safety Lock. Prevents activation of PWR_EN when SYS_EN is low.
0 = PWR_EN “AND” with SYS_EN signal
1 = PWR_EN independent of SYS_EN
Reserved
Delay time for High Voltage Power Domains LDO2, LDO3, LDO4, Buck2, and Buck3 after
activation of SYS_EN. VCC_LDO1 has no delay.
Data Code
Delay mS
2h’0
0.0
2h’1
0.5
2h’2
1.0
2h’3
1.4
Buck 3 PWM/PFM Mode Select
0 - Auto Switch between PFM and PWM operation
1 - PWM Mode Only will not switch to PFM
Buck 2 PWM/PFM Mode Select
0 - Auto Switch between PFM and PWM operation
1 - PWM Mode Only will not switch to PFM
Buck 1 PWM/PFM Mode Select
0 - Auto Switch between PFM and PWM operation
1 - PWM Mode Only will not switch to PFM
External Clock Select
0 = Internal Oscillator clock for Buck Converters
1 = External 13 MHz Oscillator clock for Buck Converters
6
-
-
5:4
R/W
SENDL
Notes
Default for “B”
Default for “A”
3
R/W
FPWM3
2
R/W
FPWM2
1
R/W
FPWM1
0
R/W
ECEN
L
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相關(guān)代理商/技術(shù)參數(shù) |
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| LP3971SQX-B410 | 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| LP3971SQX-B410/NOPB | 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| LP3971SQX-B510/NOPB | 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| LP3971SQX-D510 | 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| LP3971SQX-D510/NOPB | 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
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