SC2453 Semtech Corporation, SC2453 Datasheet
SC2453
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SC2453 Summary of contents
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... POWER MANAGEMENT Description SC2453 is a high performance multi-output converter controller that can be configured for a variety of applica- tions. The SC2453 utilizes synchronous rectified buck topologies where efficiency is most important. It also provides dedicated programmable positive and negative linear regulators using external transistors in conjunction with coupled windings to generate positive and negative voltages ...
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... SC2453 PRELIMINARY µ µ ...
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... Note: Only available in tape and reel packaging. A reel contains 2500 devices. 5 SC2453 PRELIMINARY ° ° www.semtech.com ...
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... POWER MANAGEMENT Block Diagram 2002 Semtech Corp. 7 SC2453 PRELIMINARY www.semtech.com ...
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... POK pin is pulled low. The POK pin is held low until the end of the start-up sequence. 2002 Semtech Corp. OSCILLATOR The switching frequency of the SC2453 is set by an ex- ternal resistor using the following formula freq ...
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... POWER MANAGEMENT Applications Information (Cont.) PWM CONTROLLER SC2453 is a voltage mode buck controller that utilizes an externally compensated high bandwidth error ampli- fier to regulate output voltage. The power stage of the synchronous rectified buck converter control-to-output transfer function is as shown below ...
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... Cout only and connections between Cout and the load must be short, wide copper areas to minimize inductance and resistance. 5) The SC2453 is best placed over a quiet ground plane area. Avoid pulse currents in the Cin this area. GND should be returned to the ground plane close to the package and close to the ground side of (one of) the output capacitor(s) ...
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... POWER MANAGEMENT Evaluation Board Schematic 2002 Semtech Corp. 11 SC2453 PRELIMINARY www.semtech.com ...
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... SC2453 PRELIMINARY ...
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... SC2453 PRELIMINARY www.semtech.com ...
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... POWER MANAGEMENT Outline Drawing - TSSOP-28 Land Pattern - TSSOP-28 Contact Information Phone: (805)498-2111 FAX (805)498-3804 2002 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 14 SC2453 PRELIMINARY www.semtech.com ...