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34716

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		开关双倍数据速率
页数	文件大小	规格书
25页	661K
描述
1.0 MHz Dual Switch-Mode DDR Power Supply

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34716 数据手册

Document Number: MC34716

Rev. 3.0, 5/2007

Freescale Semiconductor

Advance Information

1.0 MHz Dual Switch-Mode DDR

Power Supply

34716

The 34716 is a highly integrated, space-efficient, low cost, dual

synchronous buck switching regulator with integrated N-channel

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

supply with its second output having the ability to track an external

reference voltage. it provides a full power supply solution for Double-

Data-Rate (DDR) Memories.

DUAL SWITCH-MODE DDR POWER

SUPPLY

Channel one provides a source only 5.0 A drive capability, while

channel two can sink and source up to 3.0 A. Both channels are highly

efficient with tight output regulation. With its high current drive

capability, channel one can be used to supply the V_DDQto the

memory chipset. The second channel’s ability to track a reference

voltage makes it ideal to provide the termination voltage (V_TT) for

modern data buses. The 34716 also provides a buffered output

reference voltage (V_REFOUT) to the memory chipset

The 34716 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 26-Pin Exposed Pad QFN.

EP SUFFIX

98ASA10728D

26-PIN QFN

Features

• 50 mΩ Integrated N-Channel Power MOSFETs

• Input Voltage Operating Range from 3.0 V to 6.0 V

ORDERING INFORMATION

Temperature

•

±1 % Accurate Output Voltages, Ranging from 0.7 V to 3.6 V

• The second output Tracks 1/2 an External Reference Voltage

±1 % Accurate Buffered Reference Output Voltage

Package

Device

Range (T )

•

MC34716EP/R2

-40 to 85°C

26 QFN

• Programmable Switching Frequency Range from 200 kHz to

1.0 MHz

• Programmable Soft Start Timing for Channel One

• Over Current Limit and Short Circuit Protection on Both Channels

• Thermal Shutdown

• Output Overvoltage and Undervoltage Detection

• Active Low Power Good Output Signal

• Active Low Standby and Shutdown Inputs

• Pb-Free Packaging Designated by Suffix Code EP.

34716

3.0V to 6.0V V_IN

PVIN2

VIN

V_DDQ

VREFIN

BOOT2

PVIN1

BOOT1

V_DDQ

V_TT

SW2

SW1

VOUT1

VOUT2

Termination

Resistors

VDDQ

INV2

INV1

DDR Memory

Chipset

DDR Memory

Controller

Memory Bus

COMP1

PGND1

COMP2

VREFOUT

PGND2

V_REF

V_IN

VDDI

FREQ

MCU

STBY

ILIM1

GND

Figure 1. 34716 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...25

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