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LP2951-50-Q1 PDF预览

LP2951-50-Q1

更新时间： 2024-11-23 12:19:07
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德州仪器 - TI 稳压器
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24页 3299K
描述
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS WITH SHUTDOWN

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LP2951-50-Q1 数据手册

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LP2951-33-Q1  
LP2951-50-Q1  
www.ti.com  
SLVSAW6D –JUNE 2011–REVISED APRIL 2013  
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS WITH SHUTDOWN  
Check for Samples: LP2951-33-Q1, LP2951-50-Q1  
1
FEATURES  
•
•
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•
•
•
•
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Qualified for Automotive Applications  
•
•
•
•
Can Be Used as a Regulator or Reference  
Wide Input Range: Up to 35 V  
Rated Output Current of 100 mA  
Low Dropout: 380 mV (Typ) at 100 mA  
Low Quiescent Current: 75 μA (Typ)  
Tight Line Regulation: 0.03% (Typ)  
Tight Load Regulation: 0.04% (Typ)  
High VO Accuracy  
Stable With Low ESR (>12 mΩ) Capacitors  
Current- and Thermal-Limiting Features  
8-Pin Package  
–
–
–
–
Fixed Voltages: 5 V/ADJ and 3.3 V/ADJ  
Low-Voltage Error Signal on Falling Output  
Shutdown Capability  
Remote Sense Capability for Optimal  
Output Regulation and Accuracy  
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–
1.4% at 25°C  
2% Over Temperature  
DRG PACKAGE  
(TOP VIEW)  
1
2
3
4
8
7
6
5
OUTPUT  
SENSE  
INPUT  
FEEDBACK  
VTAP  
Thermal  
Pad  
SHUTDOWN  
GND  
ERROR  
DESCRIPTION  
The LP2951-xx-Q1 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input  
supply-voltage range of up to 35 V. The 8-pin LP2951-xx-Q1 is able to output either a fixed or adjustable output  
from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins  
together, the LP2951-xx-Q1 outputs a fixed 5 V and 3.3 V (depending on the version). Alternatively, by leaving  
the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set  
to any value between 1.235 V to 30 V.  
The 8-pin LP2951-xx-Q1 also offers additional functionality that makes it particularly suitable for battery-powered  
applications. For example, a logic-compatible shutdown feature allows the regulator to be put in standby mode  
for power savings. In addition, there is a built-in supervisor reset function in which the ERROR output goes low  
when VOUT drops by 6% of its nominal value for whatever reasons – due to a drop in VIN, current limiting, or  
thermal shutdown.  
The LP295x-xx-Q1 devices are designed to minimize all error contributions to the output voltage. With a tight  
output tolerance (0.5% at 25°C), a very low output voltage temperature coefficient (20 ppm typical), extremely  
good line and load regulation (0.3% and 0.4% typical), and remote sensing capability, the parts can be used as  
either low-power voltage references or 100-mA regulators.  
For the most-current package and ordering information, see the Package Option Addendum at the end of this  
document, or see the TI Web site at www.ti.com.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2011–2013, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
 
 
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