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34708 Datasheet(PDF) 55 Page - Freescale Semiconductor, Inc |
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34708 Datasheet(HTML) 55 Page - Freescale Semiconductor, Inc |
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55 / 159 page  Analog Integrated Circuit Device Data 55 Freescale Semiconductor MC34708 Functional Block Description 7.5.4.6 SW4 SW4A/B is fully integrated synchronous Buck PWM voltage-mode control DC/DC regulator. It can be operated in (single phase/ dual phase mode) or as separate independent outputs. The operating mode of the Switching regulator is configured by the SW4CFG pin. The SW4CFG pin is sampled at startup. Figure 12. SW4A/B Separate Output Mode Block Diagram Table 43. SW4A/B Configuration SW4CFG SW4A/B Configuration Mode Ground Separate Independent Output VCOREDIG Single Phase VCORE Dual Phase Driver Controller EA Z1 Z2 Internal Compensation SW4IN SW4ALX SW4AFB ISENSE COSW4A CINSW 4A LSW4A SPI Interface GNDSW4A SW4A SW4AMODE SW4AFAULT VREF DAC SPI BP Driver Controller EA Z1 Z2 Internal Compensation SW4BIN SW4BLX SW4BFB ISENSE COSW 4B CINSW 4B LSW4B GNDSW4B SW4B SW4BMODE SW4BFAULT VREF DAC SPI BP SW4CFG DSW 4A DSW4B |
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