Datasheet > MC34703

MC34703

更新时间： 2024-11-09 04:40:51

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		稳压器开关
页数	文件大小	规格书
46页	2045K
描述
10A+ Switch-Mode Power Supply with LDO Regulator

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MC34703 数据手册

Document Number: MC34703

Rev. 5.0, 8/2006

Freescale Semiconductor

Technical Data

10A+ Switch-Mode Power

Supply with LDO Regulator

34703

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.

INTEGRATED POWER SUPPLY IC

The switching regulator is an efficient synchronous buck converter

with integrated low R_DS(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

PNB SUFFIX

98ASA10705D

33-PIN PQFN

• 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

ORDERING INFORMATION

Temperature

Package

Device

Range (T )

MC34703PNB/R2

-40 to 85°C

33 PQFN

• Overcurrent Protection

• Reset with Programmable Power-ON Delay

2.8 to 13.5 V

34703

VIN1

VIN2

MCU

LDRV

ISNS

LDO

VBST

VBST (sense)

VBD

VDDH (I/O)

LCMP

FREQ

CLKSYN

LFB

SDA

SCL

POR

RESET

BOOT

I C

Bus

VBST

VDDL (Core)

SW_A

SW_B

EN1

EN2

VOUT

Optional

CLKSEL

ADDR

COMP

INV

VDDI

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.

12 3 4 5 6 7...46

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