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LP3991TL-1.55 PDF预览

LP3991TL-1.55

更新时间： 2024-11-23 20:44:15
品牌 Logo 应用领域
美国国家半导体 - NSC 输出元件调节器
页数 文件大小 规格书
12页 269K
描述
IC VREG FIXED POSITIVE LDO REGULATOR, PBGA4, 0.963 X 1.446 MM, LEAD FREE, MICRO SMD-4, Fixed Positive Single Output LDO Regulator

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LP3991TL-1.55 技术参数

生命周期：Transferred包装说明：,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.33
JESD-30 代码：R-PBGA-B4端子数量：4
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：GRID ARRAY认证状态：Not Qualified
调节器类型：FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR表面贴装：YES
端子形式：BALL端子位置：BOTTOM
Base Number Matches：1

LP3991TL-1.55 数据手册

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September 5, 2008  
LP3991  
300mA Linear Voltage Regulator for Digital Applications  
General Description  
Features  
Operating from a minimum input voltage of 1.65V, the LP3991  
regulator has been designed to provide fixed stable output  
voltages for load currents up to 300mA. This device is suitable  
where accurate, low voltages are required from low input volt-  
age sources and is therefore suitable for post regulation of  
switched mode regulators. In such applications, significant  
improvements in performance and EMI can be realized, with  
little reduction in overall efficiency. The LP3991 will provide  
fixed outputs as low as 1.2V from a wide input range of 1.65V  
to 4.0V Using the enable pin, the device may be controlled to  
provide a shutdown state, in which negligible supply current  
is drawn.  
Operation from 1.65V to 4.0V Input  
■
■
■
■
■
■
■
■
1% accuracy at room temperature  
Output Voltage from 1.2V to 2.8V  
125mV Dropout at 300mA load  
50µA Quiescent Current at 1mA Load  
Inrush Current controlled to 600mA  
PSRR 65dB at 1kHz  
100µs Start-Up time for 1.5V VOUT  
Stable with Ceramic Capacitors as small as 0402  
■
■
Thermal-Overload and Short-Circuit Protection  
The LP3991 is designed to be stable with space saving ce-  
ramic capacitors as small as 0402 case size.  
Package  
4 pin micro SMD (0.963mm x 1.446mm)  
Performance is specified for a -40°C to 125°C junction tem-  
perature range.  
For other package options contact your NSC sales office.  
For output voltage options please contact your local NSC  
sales office.  
Applications  
Post DC/DC Regulator  
■
■
Battery Operated Devices  
Hand-Held Information Appliances  
■
Typical Application Circuit  
20110002  
© 2008 National Semiconductor Corporation  
201100  
www.national.com  
1234567...12

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