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參數(shù)資料
| 型號： | LP3907SQ-JIXI |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A DUAL SWITCHING CONTROLLER, 2100 kHz SWITCHING FREQ-MAX, QCC24 |
| 封裝： | 4 X 4 MM, 0.8 MM HEIGHT, LLP-24 |
| 文件頁數(shù)： | 9/44頁 |
| 文件大小： | 3058K |
| 代理商： | LP3907SQ-JIXI |
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DC/DC Converters
OVERVIEW
The LP3907 supplies the various power needs of the application by means of two Linear Low Drop Regulators (LDO1 and LDO2)
and two Buck converters (SW1 and SW2). The table hereunder lists the output characteristics of the various regulators.
Supply Specification
Supply
Load
Output
V
OUT Range(V)
Resolution (mV)
I
MAX
Maximum Output
Current (mA)
LDO1
analog
1.0 to 3.5
100
300
LDO2
analog
1.0 to 3.5
100
300
SW1
digital
0.8 to 2.0
50
1000
SW2
digital
1.0 to 3.5
100
600
*For default values of the regulators, please consult page 3 of this datasheet.
LINEAR LOW DROPOUT REGULATORS (LDOS)
LDO1 and LDO2 are identical linear regulators targeting ana-
log loads characterized by low noise requirements. LDO1 and
LDO2 are enabled through the ENLDO pin or through the
corresponding LDO1 or LDO2 control register. The output
voltages of both LDOs are register programmable. The de-
fault output voltages are factory programmed during Final
Test, which can be tailored to the specific needs of the system
designer.
30017822
NO-LOAD STABILITY
The LDOs will remain stable and in regulation with no external
load. This is an important consideration in some circuits, for
example, CMOS RAM keep-alive applications.
LDO1 AND LDO2 CONTROL REGISTERS
LDO1 and LDO2 can be configured by means of the LDO1
and LDO2 control registers. The output voltage is pro-
grammable in steps of 100mV from 1.0V to 3.5V by program-
ming bits D4-0 in the LDO Control registers. Both LDO1 and
LDO2 are enabled by applying a logic 1 to the ENLDO1 and
ENLDO2 pin. Enable/disable control is also provided through
enable bit of the LDO1 and LDO2 control registers. The value
of the enable LDO bit in the register is logic 1 by default. The
output voltage can be altered while the LDO is enabled.
17
www.national.com
LP3907
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LP3907SQ-JXQX | 制造商:Texas Instruments 功能描述: |
| LP3907SQ-JXQX/NOPB | 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| LP3907SQ-JXQX/S7001874 | 制造商:Texas Instruments 功能描述:NSCLP3907SQ-JXQX@S7001874 1A&0.6A BUCKS |
| LP3907SQ-JXQXEV | 功能描述:LP3907 EVALUATION BOARD RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結(jié)構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LP3907SQ-JXQXEV/NOPB | 功能描述:BOARD EVAL FOR LP3907 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結(jié)構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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