34702 Datasheet | Freescale Semiconductor

.. Freescale Semiconductor Technical Data Document Number: MC34702 Rev 6.0, 2/2007 3.0 A Switch-Mode Power Supply with Linear Regulator The 34702 provides the means to efficiently supply the Freescale Power QUICC™ I, II, and other families of Freescale microprocessors and DSPs. The 34702 incorporates a highperformance switching regulator, providing the direct supply for the microprocessor’s core, and a low dropout (LDO) linear regulator control circuit providing the microprocessor I/O and bus voltage. The switching regulator is a high-efficiency synchronous buck regulator with integrated N-channel power MOSFETs to provide protection Features and to allow space-efficient, pact design. The 34702 incorporates many advanced Features ; e.g., precisely maintained up/down power sequencing, ensuring the proper operation and protection of the CPU and power system. Features - - - - - - - - - Operating Voltage from 2.8 V to 6.0 V High-Accuracy Output Voltages Fast Transient Response Switcher Output Current Up to 3.0 A Undervoltage Lockout and Overcurrent Protection Enable Inputs and Programmable Watchdog Timer Voltage Margining via I2C™ Bus Reset with Programmable Power-ON Delay Pb-Free Packaging Designated by Suffix Code EK I2C is a trademark of Philips Corporation. POWER SUPPLY INTEGRATED CIRCUIT EK (PB-FREE) SUFFIX 98AARH99137A 32-PIN SOICW ORDERING INFORMATION Device MC34702EK/R2 Temperature Range (TA) -40 to 85°C Package 32 SOICW 2.8 V to 6.0 V Input VIN2 VBD VBST RT VIN1 LDRV CS LDO LFB MPC8xxx RST BOOT SW VOUT PGND INV VDDI VBST Adjustable: 0.8 V to VIN Dropout PORESET Other Circuits Adjustable: 0.8 V to VIN Dropout VDDH (I/Os) ADDR SDA SCL GND EN1 EN2 CLKSYN CLKSEL Optional FREQ VDDL (Core) Figure 1. 34702 Simplified Application Diagram Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as may be required, to permit improvements in the design of its products. © Freescale Semiconductor,...