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MC34703

Freescale Semiconductor
Part Number MC34703
Manufacturer Freescale Semiconductor
Description Switch-Mode Power Supply
Published Jul 4, 2007
Detailed Description Freescale Semiconductor Technical Data Document Number: MC34703 Rev. 5.0, 8/2006 10A+ Switch-Mode Power Supply with L...
Datasheet PDF File MC34703 PDF File

MC34703
MC34703

Overview
Freescale Semiconductor Technical Data Document Number: MC34703 Rev.
5.
0, 8/2006 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 highperformance 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 www.
DataSheet4U.
com • Overcurrent Protection • Reset with Programmable Power-ON Delay 2.
8 to 13.
5 V 34703 INTEGRATED POWER SUPPLY IC PNB SUFFIX 98ASA10705D 33-PIN PQFN ORDERING INFORMATION Device MC34703PNB/R2 Temperature Range (TA) -40 to 85°C Package 33 PQFN 34703 VIN2 VBST VBST (sense) VBD FREQ CLKSYN VIN1 LDRV ISNS LDO LCMP SR LFB RESET BOOT SW_A SW_B VOUT COMP PGND GND INV RT VBST MCU VDDH (I/O) I2C Bus SDA SCL EN1 EN2 Optional CLKSEL ADDR VDDI POR VDDL (Core) Figure 1.
MC34703 Simplified Application Diagram * 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.
INTERNAL BLOCK DIAGR...


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