參數(shù)資料
型號(hào)： LP3918TL-I
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25
封裝： 2.50 X 2.50 MM, MICRO, SMD-25
文件頁數(shù)： 26/30頁
文件大小： 1271K
代理商： LP3918TL-I
POWER SUPPLY CONFIGURATIONS
At PMU start up, LDO1, LDO2 and LDO3 are always started
with their default voltages. The start up sequence of the LDO's
is given below.
Startup Sequence
LDO1 -> LDO2 -> LDO3
LDO's with external enable control (LDO4, LDO5, LDO6) start
immediately after LDO2 if enabled by logic high at their re-
spective control inputs.
LDO7 (and LDO1 and 3) may be programmed to enable/dis-
able once PS_HOLD has been asserted.
Default voltages for the LDOs are shown in Table 1 and Table
2 shows the voltages that may be programmed via the Serial
Interface.
DEVICE PROGRAMMABILITY
An I2C compatible Serial Interface is used to communicate
with the device to program a series of registers and also to
read status registers. These internal registers allow control
over LDO outputs and their levels. The charger functions may
also be programmed to alter termination voltage, end of
charge current, charger restart voltage, full rate charge cur-
rent, and also the charging mode.
This device internal logic is powered from LDO2.
TABLE 1. LDO Default Voltages
LDO
Function
mA
Default Voltage (V)
Startup Default
Enable Control
1
CORE
300
1.8
ON
SI
2
DIGI
300
3.0
ON
-
3
ANA
80
3.0
ON
SI
4
TCXO
80
3.0
OFF
TCXO_EN
5
RX
150
3.0
OFF
RX_EN
6
TX
150
3.0
OFF
TX_EN
7
GP
150
3.0
OFF
SI
TABLE 2. LDO Output Voltages Selectable via Serial Interface
LDO
mA
1.5
1.8
1.85
2.5
2.6
2.7
2.75
2.8
2.85
2.9
2.95
3.0
3.05
3.1
3.2
3.3
1
CORE
300
+
2
DIGI
300
+
3
ANA
80
+
4
TCXO
80
+
5
RX
150
+
6
TX
150
+
7
GP
150
+
5
www.national.com
LP3918
相關(guān)PDF資料
PDF描述
LP3923TLX 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
LP3923TLX-VB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
LP3923TL-VB 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
LP3923TLX-VC 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
LP3923TL-VI 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA30
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP3918TL-L 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management and Regulator Unit
LP3918TLX 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:
LP3918TLX/NOPB 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
LP3918TLX-A 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Battery Charge Management and Regulator Unit
LP3918TLX-A/NOPB 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
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