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LP2951-N_15 PDF预览

LP2951-N_15

更新时间: 2024-11-09 01:20:23
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德州仪器 - TI /
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51页 2006K
描述
LP295x-N Series of Adjustable Micropower Voltage Regulators

LP2951-N_15 数据手册

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LP2950-N, LP2951-N  
SNVS764O JANUARY 2000REVISED DECEMBER 2014  
LP295x-N Series of Adjustable Micropower Voltage Regulators  
1 Features  
3 Description  
The LP2950-N and LP2951-N are micropower  
1
Input Voltage Range: 2.3 V to 30 V  
voltage regulators with very low quiescent current (75  
μA typical) and very low dropout voltage (typical 40  
mV at light loads and 380 mV at 100 mA). They are  
ideally suited for use in battery-powered systems.  
Furthermore, the quiescent current of the LP2950-  
N/LP2951-N increases only slightly in dropout,  
prolonging battery life.  
5-V, 3-V, and 3.3-V Output Voltage Versions  
Available  
High Accuracy Output Voltage  
Ensured 100-mA Output Current  
Extremely Low Quiescent Current  
Low Dropout Voltage  
Careful design of the LP2950-N/LP2951-N has  
minimized all contributions to the error budget. This  
includes a tight initial tolerance (0.5% typ.), extremely  
good load and line regulation (.05% typ.) and a very  
low output voltage temperature coefficient, making  
the part useful as a low-power voltage reference.  
Extremely Tight Load and Line Regulation  
Very Low Temperature Coefficient  
Use as Regulator or Reference  
Needs Minimum Capacitance for Stability  
Current and Thermal Limiting  
One such feature is an error flag output which warns  
of a low output voltage, often due to falling batteries  
on the input. It may be used for a power-on reset. A  
second feature is the logic-compatible shutdown input  
which enables the regulator to be switched on and  
off. Also, the part may be pin-strapped for a 5-V, 3-V,  
or 3.3-V output (depending on the version), or  
programmed from 1.24 V to 29 V with an external  
pair of resistors.  
Stable With Low-ESR Output Capacitors (10 mΩ  
to 6 )  
LP2951-N Versions Only:  
Error Flag Warns of Output Dropout  
Logic-Controlled Electronic Shutdown  
Output Programmable From 1.24 V to 29 V  
2 Applications  
The LP2950-N is available in the surface-mount TO-  
252 package and in the popular 3-pin TO-92 package  
for pin-compatibility with older 5-V regulators. The 8-  
lead LP2951-N is available in plastic, ceramic dual-in-  
line, WSON, or metal can packages and offers  
additional system functions.  
High-Efficiency Linear Regulator  
Regulator with Undervoltage Shutdown  
Low dropout Battery-powered Regulator  
Snap-ON/Snap-OFF Regulator  
Device Information(1)  
PART NUMBER PACKAGE  
BODY SIZE (NOM)  
4.30 mm x 4.30 mm  
9.91 mm x 6.58 mm  
4.90 mm x 3.91 mm  
3.00 mm x 3.00 mm  
4.00 mm x 4.00 mm  
9.81 mm x 6.35 mm  
TO-92 (3)  
LP2950-N  
TO-252 (3)  
SOIC (8)  
VSSOP (8)  
LP2951-N  
WSON (8)  
PDIP (8)  
(1) For all available packages, see the orderable addendum at  
the end of the datasheet.  
LP2951 Simplified Schematic  
LP2950-N Simplified Schematic  
LP2951  
VOUT  
VIN  
LP2950  
OUT  
IN  
COUT  
2.2 µF  
CIN  
1 µF  
VOUT  
VIN  
SENSE  
FEEDBACK  
IN  
OUT  
COUT  
2.2 µF  
CIN  
1 µF  
VFEEDBACK  
SHUTDOWN  
GND  
SHUTDOWN  
GND  
VTAP  
R1  
330 kꢀ  
VOUT  
ERROR  
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. PRODUCTION DATA.  
 
 
 
 

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