MC34702EK View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MC34702EK

3.0 A Switch-Mode Power Supply with Linear Regulator

Freescale Semiconductor 

Freescale Semiconductor

Technical Data

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 high-

performance 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, compact 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.

Document Number: MC34702

Rev 6.0, 2/2007

34702

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

Optional

2.8 V to 6.0 V Input

34702

VIN2

VIN1

VBD

VBST

RT

LDRV

CS

LDO

ADDR

SDA

SCL

GND

EN1

EN2

CLKSYN

CLKSEL

FREQ

LFB

RST

BOOT

SW

VOUT

PGND

INV

VDDI

Other

Circuits

Adjustable:

0.8 V to VIN -

Dropout

VDDH (I/Os)

MPC8xxx

VBST

PORESET

Adjustable:

0.8 V to VIN -

Dropout

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, Inc., 2007. All rights reserved.

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