FAN6555

更新时间： 2024-09-26 22:40:51

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		稳压器开关式稳压器或控制器电源电路开关式控制器双倍数据速率
页数	文件大小	规格书
12页	118K
描述
2A DDR Bus Termination Regulator

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中文翻译

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技术参数
数据手册

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FAN6555 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.75
Is Samacsys：	N	Base Number Matches：	1

FAN6555 数据手册

www.fairchildsemi.com

FAN6555

2A DDR Bus Termination Regulator

Features

Description

• Can source and sink up to 2A continous, 3A peak

• No heatsink required

• Integrated Power MOSFETs

• Generates termination voltages for DDR SDRAM

• V_REFinput available for external voltage divider

• Separate voltages for V_CCQand PV_DD

• Buffered V_REFoutput

• V_OUTof 3ꢀ or less at 2A

• Minimum external components

• 16-pin SOIC package

The FAN6555 switching regulator is designed to convert

voltage supplies ranging from 2.3V to 4V into a desired out-

put voltage or termination voltage for DDR SDRAM mem-

ory. The FAN6555 can be implemented to produce regulated

output voltages in two different modes. In the default mode,

when the V_REFpin is open, the FAN6555 output voltage is

50ꢀ of the voltage applied to V_CCQ. The FAN6555 can also

be used to produce various user-deﬁned voltages by forcing a

voltage on the VREF_INpin. In this case, the output voltage

follows the input VREF_INvoltage. The switching regulator

is capable of sourcing or sinking up to 2A of current while

regulating an output V_TTvoltage to within 3ꢀ or less.

Transient output currents of 3A can also be accommodated.

• -40°C to +85°C operating temperature range

• Shutdown for standby or suspend mode operation

• Thermal Shutdown ≈ 130ºC

The FAN6555 can also be used in conjunction with series

termination resisitors to provide an excellent voltage source

for active termination schemes of high speed transmission

lines as those seen in high speed memory buses and distrib-

uted backplane designs.

Block Diagram

VREF

OUT

SHDN

DD2

CCQ

DD1

OUT

OSCILLATOR/

RAMP

)

GENERATOR

–

200kΩ

OUT

BUFFER

REF

)

–

VREF

ERROR AMP

RAMP

COMPARATOR

200kΩ

AGND

–

GND2

GND

GND1

REV. 1.1.3 8/4/03

12 3 4 5 6 7...12

中文翻译

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