UR6512G-SH2-R [UTC]

2A DDR BUS TERMINATION REGULATOR;


型号：	UR6512G-SH2-R
厂家：	Unisonic Technologies
描述：	2A DDR BUS TERMINATION REGULATOR 双倍数据速率
文件：	总6页 (文件大小：192K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

UR6512

LINEAR INTEGRATED CIRCUIT

2A DDR BUS TERMINATION

REGULATOR



DESCRIPTION

The UR6512 is a linear regulator providing up to 2A for DDR

1/DDR 2 and 1.5A for DDR 3 transient peak current and has

sourcing and sinking capability for DDR SDRAM bus terminator

applications while regulating an output voltage to within 20mV. It

contains a high speed operational amplifier which provides fast load

transient response and only requires 10uF of ceramic output

capacitance.

The UR6512 output termination voltage tracks the reference

voltage applied at V_REFpin. A resistor divider connected to V_IN, GND

and V_REFpins is used to force the reference voltage to V_REFpin.

Additional features include current limiting protection and thermal

shutdown protection.



FEATURES

* DDR1/ DDR2/DDR3 Termination Voltage Applications

* Adjustable Output Voltage by External Resistors

* Integrated Power MOS Devices

* Suspend to RAM(STR) Functionality

* Current Limiting Protection

* Thermal Shutdown Protection

* Cost-Effective and Easy to Use



ORDERING INFORMATION

Ordering Number

UR6512G-SH2-T

UR6512G-SH2-R

Package

HSOP-8

Packing

Tube

Tape Reel



MARKING

www.unisonic.com.tw

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UR6512

LINEAR INTEGRATED CIRCUIT



PIN CONFIGURATIONS

V_IN

GND

V_REF

V_OUT

GND

V_CNTL



PIN DESCRIPTION

PIN NO

PIN NAME

VIN

PIN TYPE

PIN DESCRIPTION

Power supply pin for the VOUT output

Ground pin

GND

VREF

Reference voltage input and active-low shutdown control pin

Output voltage pin

VOUT

VCNTL

Power supply pin for the internal control circuits

No connect

5,7,8



BLOCK DIAGRAM

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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LINEAR INTEGRATED CIRCUIT

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ABSOLUTE MAXIMUM RATING (T_A=25°C, unless otherwise specified)

PARAMETER

SYMBOL

V_CNTL

V_IN

RATINGS

UNIT

V_CNTLControl Voltage

V_INSupply Voltage

Power Dissipation (T_A=25°C)

Junction Temperature

Storage Temperature

P_D

1.176

125

T_J

°C

T_STG

-65 ~ +150

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.



THERMAL DATA

PARAMETER

SYMBOL

θ_JA

RATINGS

UNIT

°C/W

Junction to Ambient (Note)

Junction to Case

θ_JC



RECOMMENDED OPERATING CONDITIONS (Note 1)

PARAMETER

SYMBOL

V_CNTL

V_IN

RATINGS

(3.3 or 5) ± 5%

(1.5 ~ 2.5) ± 3%

(0.75 ~ 1.25) ± 3%

-40~+125

UNIT

V_CNTLControl Voltage

V_INSupply Voltage

V_REFInput Voltage

V_REF

T_J

Junction Temperature

°C

Notes: 1. All voltage values are with respect to the network ground terminal unless otherwise noted.

2. The VOUT tracks the VREF with additional voltage offset and load regulation.



ELECTRICAL CHARACTERISTICS (T_A=25°C, unless otherwise specified)

(V_IN=1.8V, V_CNTL=5V, V_REF=0.9V, C_OUT= 10µF (Ceramic))

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNIT

INPUT CURRENT

Operation Current of V_CNTL

Standby Current

I_CNTL

I_STB

I_OUT=0A

2.5

V_REF<0.2V, R_LOAD=180Ω

μA

OUTPUT VOLTAGE (DDR/DDR II/DDR III)

Output Voltage Offset (V_REF-V_OUT

)

V_OS

I_OUT=0A

-20

DDR1/DDR2: I_OUT=±1.8A

DDR3: I_OUT=±1.5A

Load Regulation

∆V_LOAD

PROTECTION

V_IN=2.5V/1.8V

V_IN=1.5V

Current Limit

I_LIMIT

1.5

125

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

V_REFShutdown

T_SD

V_CNTL=5V

170

°C

∆T_SD

V_CNTL=5V

V_IH

V_IL

Enable

0.6

Shutdown Threshold

Shutdown

0.15

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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TYPICAL APPLICATIONS CIRCUIT

2.5V/1.8V

V_IN

C_IN

GND

V_REF

R₁

R₂

V_CNTL

C_SSV_OUT

C_CNTL

V_OUT

C_OUT

R1=R2=100KΩ, C_OUT=10μF(Ceramic)+1000μF under the worst case testing condition

C_SS=1μF, C_IN=470μF(Low ESR), C_CNTL=47μF

R²

, V_OUTtrack V_REF

V^IN(V)

V^REF=

R¹+R²

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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LINEAR INTEGRATED CIRCUIT

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TYPICAL CHARACTERISTICS

Output Short Circuit Protection

Sink

Source

IN=2.5V VCNTL=5V

VIN=2.5V VCNTL=5V

Time(1ms/Div)

Output Short Circuit Protection

Sink

IN=1.8V VCNTL=5V

Source

IN=1.8V VCNTL=5V

Time(1ms/Div)

1.25V^TT@1.8A Transient Response

0. 9 V^TT@1.8A Transient Response

IN=2.5V,VCNTL=5V,VOUT=1.25V

IN=1.8V,VCNTL=5V,VOUT=0.9V

-50

-1

-2

-1

-2

Time(200us/Div)

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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TYPICAL CHARACTERISTICS(Cont.)

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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