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RS6513
PWM Control 2A Step-Down Converter
RS6513 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit
is able to vary the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier circuit as
well as a soft-start circuit that prevents overshoot at startup. An enable function, an over current protect function
and a short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be
reduced from 350KHz to 30KHz. Also, an internal compensation block is built in to minimum external component
count.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these
ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices
when coupled with the SOP–8L mini-package, providing such outstanding features as low current consumption.
Since this converter can accommodate an input voltage up to 18V, it is also suitable for the operation via an AC
adapter.
Features
•
Input voltage: 3.6V to 18V.
•
Output voltage: 0.8V to V
CC.
•
Duty ratio: 0% to 100% PWM control
•
Oscillation frequency: 350KHz typ.
•
Soft-start, Current limit, Enable function
•
Thermal Shutdown function
•
Built-in internal SW P-channel MOS
•
SOP-8L Pb-Free Package.
.
Pin
Applications
•
PC Motherboard
•
LCD Monitor
•
Graphic Card
•
DVD-Video Player
•
Telecom Equipment
•
ADSL Modem
•
Printer and other Peripheral Equipment
•
Microprocessor core supply
•
Networking power supply
Configurations
Pin 1:
Feedback pin.
Pin 2:
Power-off pin
H: Normal operation
(Step-down operation)
L: Step-down operation stopped
(All circuits deactivated)
Pin 3:
Add an external resistor to set max
output current
Pin 4:
IC power supply pin
Pin 7:
GND Pin
Pin 8:
GND Pin
Pin 5:
Switch Pin. Connect external
inductor/diode here. Minimize trace area at
this pin to reduce EMI
Pin 6:
Switch Pin. Connect external
inductor/diode here. Minimize trace area at
this pin to reduce EMI
DS-RS6513-03
Oct, 2007
www.Orister.com
ORISTER [ ORISTER CORPORATION ]
