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PDF SPX1117 Data sheet ( Hoja de datos )
| Número de pieza | SPX1117 | |
| Descripción | 800mA Low Dropout Voltage Regulator | |
| Fabricantes | Exar | |
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August 2010
SPX1117
800mA Low Dropout Voltage Regulator
Rev. 2.1.0
GENERAL DESCRIPTION
The SPX1117 is a low power positive-voltage
regulator designed to satisfy moderate power
requirements with a cost effective, small
footprint solution.
This device is an excellent choice for use in
battery-powered applications and portable
computers. The SPX1117 features very low
quiescent current and a low dropout voltage of
1.1V at a full load. As output current
decreases, quiescent current flows into the
load, increasing efficiency. SPX1117 is
available in adjustable or fixed 1.5V, 1.8V,
2.5V, 3.3V and 5V output voltages.
The SPX1117 is offered in 3-pin SOT-223 and
TO-263 surface mount packages.
An output capacitor of 10µF provides
unconditional stability while a smaller 2.2µF
capacitor is sufficient for most applications.
APPLICATIONS
Desktop PC Servers
Graphic/Video Cards
Industrial Equipments
Power Supplies
FEATURES
Guaranteed 800mA Output Current
Guaranteed 1A Peak Current
Three Terminal Adjustable or Fixed
1.5V, 1.8V, 2.5V, 3.3V and 5V
Low Quiescent Current
Low Dropout Voltage of 1.1V at 800mA
0.1% Line and 0.2% Load Regulation
Stable with 2.2µF Ceramic Capacitor
Overcurrent and Thermal Protection
Lead Free, RoHS Compliant Packages
SOT223 and TO263
FUNCTIONAL DIAGRAM
Fig. 1: SPX1117 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
1 page  
SPX1117
800mA Low Dropout Voltage Regulator
Fig. 9: VIN=3.0V, IOUT=10mA
Fig. 10: VIN=3.3V, IOUT=10mA
Fig. 11: VIN=4.0V, IOUT=10mA
Fig. 12: VIN=4.85V, IOUT=10mA
Fig. 13: Line Regulation vs Temperature
VOUT=1.8V (Adj), VIN=3.3V
Fig. 14: Output Voltage vs Temperature
Different IOUT, VOUT=1.8V (Adj), VIN=3.3V
Fig. 15: Line Regulation over Temperature
ILOAD=800mA, VOUT=1.8V(adj)
© 2011 Exar Corporation
5/11
Rev. 2.1.0
5 Page 
SPX1117
800mA Low Dropout Voltage Regulator
REVISION HISTORY
Revision
2.0.0
2.1.0
Date
06/23/2010
08/24/2011
Description
Reformat of Datasheet
Addition of the Pre-Bias Output Voltage Start-up section
FOR FURTHER ASSISTANCE
Email:
Exar Technical Documentation:
http://www.exar.com/TechDoc/default.aspx?
EXAR CORPORATION
HEADQUARTERS AND SALES OFFICES
48720 Kato Road
Fremont, CA 94538 – USA
Tel.: +1 (510) 668-7000
Fax: +1 (510) 668-7030
www.exar.com
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve
design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein,
conveys no license under any patent or other right, and makes no representation that the circuits are free of patent
infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a
user’s specific application. While the information in this publication has been carefully checked; no responsibility, however,
is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or
malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its
safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in
writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all
such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
© 2011 Exar Corporation
11/11
Rev. 2.1.0
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SPX1117.PDF ] | |
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