MC34712 datasheet(1/24 Pages) FREESCALE

No de pièce	MC34712

Description	3.0 A 1.0 MHz Fully Integrated DDR Switch-Mode Power Supply

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Fabricant	FREESCALE [Freescale Semiconductor, Inc]

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Document number: MC34712

Rev. 5.0, 12/2008

Freescale Semiconductor

Advance Information

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

3.0 A 1.0 MHz Fully Integrated

DDR Switch-Mode Power

Supply

The 34712 is a highly integrated, space efficient, low cost, single

synchronous buck switching regulator with integrated N-channel

power MOSFETs. It is a high performance point-of-load (PoL) power

supply with the ability to track an external reference voltage.

Its high efficient 3.0 A sink and source capability combined with its

voltage tracking/sequencing ability and tight output regulation, makes

it ideal to provide the termination voltage (VTT) for modern data buses

such as Double-Data-Rate (DDR) memory buses. It also provides a

buffered output reference voltage (VREF) to the memory chipset

The 34712 offers the designer the flexibility of many control,

supervisory, and protection functions to allow for easy implementation

of complex designs. It is housed in a Pb-free, thermally enhanced,

and space efficient 24 Pin Exposed Pad QFN.

Features

•50 mΩ integrated N-channel power MOSFETs

• Input voltage operating range from 3.0 to 6.0 V

•

±1% Accurate output voltage, ranging from 0.7 to 1.35 V

•

±1% Accurate buffered reference output voltage

• Programmable switching frequency range from 200 kHz to

1.0 MHz with a default of 1.0 MHz

• Over-current limit and short-circuit protection

• Thermal shutdown

• Output over-voltage and under-voltage detection

• Active low power good output signal

• Active low standby and shutdown inputs

• Pb-free packaging designated by suffix code EP.

Figure 1. 34712 Simplified Application Diagram

SWITCH-MODE POWER SUPPLY

EP SUFFIX

98ARL10577D

24-PIN QFN

34712

ORDERING INFORMATION

Device

Temperature

Range (TA)

Package

MC34712EP/R2

-40 to 85°C

24 QFN

VIN

MCU

PVIN

VREFIN

VIN

VDDI

FREQ

GND

SD

STBY

BOOT

SW

VOUT

INV

COMP

VREFOUT

PGND

PG

DDR MEMORY

CONTROLER

34712

VDDQ

DDR MEMORY

CHIPSET

VIN

VREF

VTT

VDDQ

MEMORY

BUS

TERMINATING

RESISTORS

(3.0 TO 6.0 V)

Numéro de pièce similaire - MC34712

Fabricant	No de pièce	Fiches technique	Description
Freescale Semiconductor...	MC34712EP	477Kb / 23P	3.0A 1.0MHz Fully Integrated DDR Switch-Mode Power Supply
Freescale Semiconductor...	MC34712EPR2	477Kb / 23P	3.0A 1.0MHz Fully Integrated DDR Switch-Mode Power Supply

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Description similaire - MC34712

Fabricant	No de pièce	Fiches technique	Description
Freescale Semiconductor...	MC34164-3	477Kb / 23P	3.0 A 1.0 MHz Fully Integrated DDR Switch-Mode Power Supply
NXP Semiconductors	KT34712UG	2Mb / 16P	Using the 3.0 A 1.0 MHz Fully Integrated DDR Switch-Mode Power Supply Rev. 4.0, 1/2009
Freescale Semiconductor...	MC34717	778Kb / 28P	5.0 A 1.0 MHz Fully Integrated Dual Switch-Mode Power Supply
	MC34713	587Kb / 23P	5.0 A 1.0 MHz Fully Integrated Single Switch-Mode Power Supply
	34717	651Kb / 25P	5.0 A 1.0 MHz Fully Integrated Dual Switch-Mode Dual Switch-Mode Power Supply
NXP Semiconductors	KT34717UG	1Mb / 20P	Using the 5.0 A 1.0 MHz Fully Integrated Dual Switch-Mode Power Supply Rev. 3.0, 1/2009
Freescale Semiconductor...	MC34716	772Kb / 27P	1.0 MHz Dual Switch-Mode DDR Power Supply
	34716	664Kb / 25P	1.0 MHz Dual Switch-Mode DDR Power Supply
	34712	477Kb / 23P	3.0A 1.0MHz Fully Integrated DDR Switch-Mode Power Supply
NXP Semiconductors	KT34716UG	1,005Kb / 17P	Using the 1.0 MHz Dual Switch-Mode DDR Power Supply Rev. 3.0, 1/2009

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