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| 型号： | LP3907SQ-JIXI |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A DUAL SWITCHING CONTROLLER, 2100 kHz SWITCHING FREQ-MAX, QCC24 |
| 封装： | 4 X 4 MM, 0.8 MM HEIGHT, LLP-24 |
| 文件页数： | 9/44页 |
| 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
相关PDF资料 |
PDF描述 |
|---|---|
| LP3918TL-I | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA25 |
| 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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LP3907SQ-JXQX | 制造商:Texas Instruments 功能描述: |
| LP3907SQ-JXQX/NOPB | 功能描述:其他电源管理 RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装: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 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:PowerWise® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型: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 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:PowerWise® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
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