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PDF SP6669 Data sheet ( Hoja de datos )
| Número de pieza | SP6669 | |
| Descripción | 600mA 1.5MHz Synchronous Step Down Converter | |
| Fabricantes | Exar | |
| Logotipo |  |
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SP6669
600mA 1.5MHz Synchronous Step Down Converter
May 2016
GENERAL DESCRIPTION
The SP6669 is a synchronous current mode
PWM step down (buck) converter capable of
delivering up to 600mA of current. It features a
pulse skip mode (PSM) for light load efficiency
and a LDO mode for 100% duty cycle.
With a 2.5V to 5.5V input voltage range and a
1.5MHz switching frequency, the SP6669 allows
the use of small surface mount inductors and
capacitors ideal for battery powered portable
applications. The internal synchronous switch
increases efficiency and eliminates the need for
an external Schottky diode. Low output
voltages are easily supported with the 0.6V
feedback reference voltage. The SP6669 is
available in an adjustable output voltage
version, using an external resistor divider
circuit, as well as fixed output voltage versions
of 1.2V, 1.5V and 1.8V.
Built-in over temperature and output over
voltage lock-out protections insure safe
operations under abnormal operating
conditions.
The SP6669 is offered in a RoHS compliant,
“green”/halogen free 5-pin SOT23 package.
Rev. 2.2.1
APPLICATIONS
Portable Equipments
Battery Operated Equipments
Audio-Video Equipments
Networking & Telecom Equipments
FEATURES
Guaranteed 600mA Output Current
Input Voltage: 2.5V to 5.5V
1.5MHz PWM Current Mode Control
100% Duty Cycle LDO Mode Operations
Achieves 95% Efficiency
Fixed/Adjustable Output Voltage
Range
As Low as 0.6V with ±3% Accuracy
1.2V, 1.5V, 1.8V Fixed Voltage Options
Excellent Line/Load Transient
Response
200µA Quiescent Current
Over Temperature Protection
RoHS Compliant “Green”/Halogen Free
5-Pin SOT23 Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP6669 Application Diagram (Adj. version shown)
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
1 page  
SP6669
600mA 1.5MHz Synchronous Step Down Converter
TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at VIN = 2.7V to 5.5V, TJ = TA = 25°C, unless otherwise specified - Schematic and BOM from Application
Information section of this datasheet.
Fig. 4: Efficiency vs Output Current (mA)
Fig. 5: Efficiency vs Output Current (mA)
Fig. 6: Efficiency vs Output Current (mA)
Fig. 7: Efficiency vs Output Current (mA)
Fig. 8: Output Voltage vs Load Current
Fig. 9: Reference Voltage vs Temperature
© 2016 Exar Corporation
5/11
Rev. 2.2.1
5 Page 
SP6669
600mA 1.5MHz Synchronous Step Down Converter
REVISION HISTORY
Revision
2.0.0
2.1.0
2.2.0
2.2.1
Date
07/15/2011
02/07/2012
11/08/2012
05/13/2016
Description
Reformat of datasheet
Updated package specification
Updated Typical Application schematics and Design example
Reformat of datasheet (New logo)
Updated Absolute Maximum Ratings, Lead Temperature (Soldering, 10 sec) to
260°C
260°C
Reformat of datasheet (New logo)
Changed oscillator frequency unit
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.
© 2016 Exar Corporation
11/11
Rev. 2.2.1
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SP6669.PDF ] | |
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