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RS6515
2A, 20V, 400KHz DC/DC Asynchronous Step‐Down Converter
General Description
The RS6515 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 RS6515'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 RS6515 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
Applications
● 2A Output Current
● Up to 93% Efficiency
● PC Motherboard, Graphic Card
● LCD Monitor
● Integrated 100mΩ Power MOSFET Switches
● Fixed 385KHz Frequency
● Cycle‐by‐Cycle Over Current Protection
● Thermal Shutdown function
● Set‐Top Boxes
● DVD‐Video Player
● Telecom Equipment
● ADSL Modem
● Wide 4.75V to 21V Operating Input Range
● Output Adjustable from 0.92V to 18V
● Programmable Under Voltage Lockout
● Available in an MSOP‐10(EP) Package
● RoHS Compliant and 100% Lead (Pb)‐Free and Green
(Halogen Free with Commercial Standard)
● Printer and other Peripheral Equipment
● Microprocessor core supply
● Networking power supply
● Pre‐Regulator for Linear Regulators
● Green Electronics/Appliances
Application Circuits
C5
L1 15uH
10nF
U1
OUTPUT
3.3V/2A
4
9
INPUT
4.75V to 21V
D1
IN
R1
5
SW
FB
B340A
OFF
ON
25.8KΩ 1%
EN
SS
C1
C2
10uF/35V
CERAMIC x2
10
6
7
(Optional)
C3
C6
R3
5.6KΩ
8
C4
R2
22uF/6.3V
CERAMIC x2
GND COMP
10KΩ 1%
0.1uF
RS6515‐ADMS
8.2nF
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‐RS6515‐08 JULY, 2010
www.Orister.com