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RS6508A-50SP

Description
2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter
File Size505KB,10 Pages
ManufacturerOrister
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RS6508A-50SP Overview

2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter

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RS6508A 
2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 
 
 
General Description 
The RS6508A is a high‐efficiency asynchronous step‐down DC/DC converter that can deliver up to 2A output current from 
4.75V  to  20V  input  supply.  The  RS6508A's  current  mode  architecture  and  external  compensation  allow  the  transient 
response to be optimized over a wide range of loads and output capacitors. Cycle‐by‐cycle current limit provides protection 
against shorted outputs and soft‐start eliminates input current surge during start‐up. 
 
The  RS6508A also  provides  output under  voltage  protection  and  thermal  shutdown  protection.  The  low  current  (<30μA) 
shutdown mode provides output disconnection, enabling easy power management in battery‐powered systems.
 
Features 
2A Output Current 
Up to 93% Efficiency 
Integrated 100mΩ Power MOSFET Switches 
Fixed 1.2MHz Frequency 
Cycle‐by‐Cycle Over Current Protection 
Thermal Shutdown function 
Wide 4.75V to 20V Operating Input Range 
Output Adjustable from 0.925V to 18V 
Programmable Under Voltage Lockout 
Available in an SOP‐8 Package 
RoHS Compliant and 100% Lead (Pb)‐Free and Green 
(Halogen Free with Commercial Standard) 
Applications 
PC Motherboard, Graphic Card 
LCD Monitor 
Set‐Top Boxes 
DVD‐Video Player 
Telecom Equipment 
ADSL Modem 
Printer and other Peripheral Equipment 
Microprocessor core supply 
Networking power supply 
Pre‐Regulator for Linear Regulators 
Green Electronics/Appliances 
Application Circuits 
 
C5
1
INPUT
4.75V to 21V
C1
10uF/35V
CERAMIC x2
OFF ON
BS
2
7
8
C4
0.1uF
4
U1
IN
EN
SS
GND
10nF
SW
FB
COMP
3
5
6
C6
R3
5.6KΩ
1nF
C3
8.2nF
R2
10KΩ 1%
D1
B340A
R1
25.8KΩ 1%
C2
22uF/6.3V
CERAMIC x2
L1
4.7uH
OUTPUT
3.3V/2A
RS6508A‐ADS
 
 
This  integrated  circuit  can  be  damaged  by  ESD.  Orister  Corporation  recommends  that  all  integrated  circuits  be  handled  with 
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. 
 
ESD  damage  can  range  from  subtle  performance  degradation  to  complete  device  failure.  Precision  integrated  circuits  may  be  more 
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
 
DS‐RS6508A‐05 
   
February, 2010 
www.Orister.com

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Description 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter 2A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter
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