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FSP3126

FOSLINK SEMICONDUCTOR
Part Number FSP3126
Manufacturer FOSLINK SEMICONDUCTOR
Description WIDE INPUT 2A STEP DOWN CONVERTER
Published Sep 15, 2010
Detailed Description www.DataSheet4U.com WIDE INPUT 2A STEP DOWN CONVERTER FSP3126 „ FEATURES z 2A Output Current z Up to 95% Efficiency z ...
Datasheet PDF File FSP3126 PDF File

FSP3126
FSP3126

Overview
www.
DataSheet4U.
com WIDE INPUT 2A STEP DOWN CONVERTER FSP3126 „ FEATURES z 2A Output Current z Up to 95% Efficiency z 4.
75V to 20V Input Range z 8µA Shutdown Supply Current z 410kHz Switching Frequency z Adjustable Output Voltage z Cycle-by-Cycle Current Limit Protection z Thermal Shutdown Protection z Frequency Foldback at Short Circuit z Stability with Wide Range of Capacitors, Including Low ESR Ceramic Capacitors z SOP8L Package „ GENERAL DESCRIPTION The FSP3126 is a current-mode step-down DC/DC converter that generates up to 2A of output current at 410kHz switching frequency.
The device utilizes ISOBCD20 process for operation with input voltages up to 20V.
Consuming only 8µA in shutdown mode, the FSP3126 is highly efficient with peak operating efficiency at 95%.
Protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.
The FSP3126 is available in a SOP8L package and requires very few external devices for operation.
„ Typical Application z z z z z z z TFT LCD Monitors Portable DVDs Car-Powered or Battery-Powered Equipments Set-Top Boxes Telecom Power Supplies DSL and Cable Modems and Routers Termination Supplies „ PIN ASSIGNMENT (Top View) BS 1 IN SW G 2 3 4 8 7 N/C EN COMP FB FSP3126 6 5 „ PIN DESCRIPTION Name BS IN SW G FB COMP EN N/C No.
1 2 3 4 5 6 7 8 Description Bootstrap.
This pin acts as the positive rail for the high-side switch’s gate driver.
Connect a 10nF capacitor between BS and SW.
Input Supply.
Bypass this pin to G with a low ESR capacitor.
See Input Capacitor in the Application Information section.
Switch Output.
Connect this pin to the switching end of the inductor.
Ground.
Feedback Input.
The voltage at this pin is regulated to 1.
293V.
Connect to the resistor divider between output and ground to set output voltage.
Compensation Pin.
See Stability Compensation in the Application Information section.
Enable Input.
When higher than 1.
3V, this pin turns the IC on.
When lower than 0...


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