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Partname: | SG1577 |
Description: | Dual Synchronous DC/DC Controller |
Manufacturer: | Fairchild Semiconductor |
Datasheet: | PDF (653K). Click here to download *) |
The SG1577 is a high-efficiency, voltage-mode, dualchannel, synchronous DC/DC PWM controller for two independent outputs. The two channels are operated out of phase. The internal reference voltage is trimmed to 0.7V1.5%. It is connected to the error amplifier's positive terminal for voltage feedback regulation. The soft-start circuit ensures the output voltage can be gradually and smoothly increased from zero to its final regulated value. The soft-start pin can also be used for chip-enable function. When two soft-start pins are grounded, the chip is disabled and the total operation current can be reduced to under 0.55mA. The fixedfrequency is programmable from 60kHz to 320kHz. The Over-Current Protection (OCP) level can be programmed by an external current sense resistor. It has two integrated sets of internal MOSFET drivers. SG1577 is available in 20-pin SOP and DIP packages. |
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Click here to download SG1577 Datasheet*) |
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