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MC34703 Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC34703 Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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1 / 46 page  Document Number: MC34703 Rev. 5.0, 8/2006 Freescale Semiconductor Technical Data * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2006. All rights reserved. 10A+ Switch-Mode Power Supply with LDO Regulator The 34703 integrated power supply IC is designed to support the PowerQUICC™ family of MCUs as well as other MCUs and DSPs requiring a high current core supply. The 34703 incorporates a high- performance switching regulator for the microprocessor’s core supply, and a low-dropout (LDO) linear regulator control circuit to provide I/O and bus voltage. The switching regulator is an efficient synchronous buck converter with integrated low RDS(ON) high side and low side FETs. Temperature and current sensing is built in and provides protection for the IC as well as the external circuitry. The 34703 incorporates specific advanced protection features for use with high power processors and controllers, including power-up and power-down sequencing of the I/O and core supply voltages in relation to each other. Features • Wide input Operating Voltage Range: 2.8 V to 13.5 V • Adjustable Output Voltages • Continuous Core Voltage Supply Currents up to 10 A (with infrequent excursions to 12 A permitted) • Undervoltage Lockout • Selectable Power Sequencing • Programmable Watchdog Timer • Voltage Margining via I2C Bus • Overcurrent Protection • Reset with Programmable Power-ON Delay Figure 1. MC34703 Simplified Application Diagram INTEGRATED POWER SUPPLY IC PNB SUFFIX 98ASA10705D 33-PIN PQFN 34703 ORDERING INFORMATION Device Temperature Range (TA) Package MC34703PNB/R2 -40 to 85°C 33 PQFN 34703 2.8 to 13.5 V VDDH (I/O) VDDL (Core) MCU POR VIN1 LDRV LDO LFB ISNS RESET SW_A INV CLKSEL BOOT VOUT LCMP ADDR VDDI CLKSYN FREQ EN1 SDA SCL EN2 VBD VBST (sense) VIN2 VBST SR SW_B VBST COMP RT Optional I2C Bus |
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