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RS6511A Datasheet, PDF (1/10 Pages) Orister Corporation – 3A, 20V, 1.2MHz DC/DC Asynchronous Step‐Down Converter | |||
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RS6511A
3A, 20V, 1.2MHz DC/DC Asynchronous StepâDown Converter
Page No. : 1/10
General Description
The RS6511A is a highâefficiency asynchronous stepâdown DC/DC converter that can deliver up to 3A output current from
4.75V to 20V input supply. The RS6511A's current mode architecture and external compensation allow the transient
response to be optimized over a wide range of loads and output capacitors. Cycleâbyâcycle current limit provides protection
against shorted outputs and thermal shutdown protection.
The RS6511A also provides output under voltage protection and thermal shutdown protection. The low current (<30μA)
shutdown mode provides output disconnection, enabling easy power management in batteryâpowered systems.
Features
â 3A Output Current
â Up to 93% Efficiency
â Integrated 100mΩ Power MOSFET Switches
â Fixed 1.2MHz Frequency
â CycleâbyâCycle Over Current Protection
â Thermal Shutdown function
â Wide 4.75V to 20V Operating Input Range
â Output Adjustable from 1.23V to 18V
â Programmable Under Voltage Lockout
â Available in an SOPâ8 with Exposed Pad Package
â RoHS Compliant and 100% Lead (Pb)âFree and Green
(Halogen Free with Commercial Standard)
Applications
â PC Motherboard, Graphic Card
â LCD Monitor
â SetâTop Boxes
â DVDâVideo Player
â Telecom Equipment
â ADSL Modem
â Printer and other Peripheral Equipment
â Microprocessor core supply
â Networking power supply
â PreâRegulator for Linear Regulators
â Green Electronics/Appliances
Application Circuits
INPUT
4.75V to 21V
10uF/35V C1
CERAMIC x2
OFF ON
U1
2 IN
7
EN
SW 3
8 NC
FB 5
4 GND COMP 6
RS6511AâADSE
C5
L1
10nF
D1
4.7uH
B340A
C6 1nF
C3
R3
5.6KΩ 8.2nF
R1
16.9KΩ 1%
OUTPUT
3.3V/3A
C2
R2
10KΩ 1%
22uF/6.3V
CERAMIC x2
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.
DSâRS6511Aâ05 February, 2010
www.Orister.com
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