UR6515AL-TQ5-R [UTC]

Terminator Support Circuit,;


型号：	UR6515AL-TQ5-R
厂家：	Unisonic Technologies
描述：	Terminator Support Circuit, 接口集成电路
文件：	总7页 (文件大小：352K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

UR6515A

LINEAR INTEGRATED CIRCUIT

3A DDR BUS TERMINATION

REGULATOR



DESCRIPTION

TO-263-5

The UR6515A is a linear regulator providing up to 3A transient

peak current sourcing and sinking capability for DDR SDRAM bus

terminator applications while regulating an output voltage to within

40mV. It contains a high speed operational amplifier which provides

fast load transient response and only requires 10uF of ceramic

output capacitance.

The UR6515A 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.

TO-252-5



FEATURES

* DDR1/ DDR2 termination voltage applications

* Low output voltage offset within 20mV

* Source and sink 3A peak current

* 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

Lead Free

Package

Packing

Halogen Free

UR6515AL-TN5-R

UR6515AL-TQ5-R

UR6515AL-TQ5-T

UR6515AG-TN5-R

UR6515AG-TQ5-R

UR6515AG-TQ5-T

TO-252-5

TO-263-5

Tape Reel

Tube

UR6515AG-TN5-R

(1)Packing Type

(2)Package Type

(3)Green Package

(1) R: Tape Reel, T:Tube

(2) TN5: TO-252-5, TQ5: TO-263-5

(3) G: Halogen Free and Lead Free, L: Lead Free



MARKING

UTC

UR6515A

L: Lead Free

G: Halogen Free

Lot Code

Date Code

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UR6515A

LINEAR INTEGRATED CIRCUIT



PIN CONFIGURATIONS

VOUT

VREF

TAB is VCNTL

VCNTL

GND

VIN

PIN DESCRIPTION

PIN NAME

PIN TYPE

PIN DESCRIPTION

V_IN

Power supply pin for the VOUT output

Ground pin

GND

V_CNTL

V_REF

V_OUT

Power supply pin for the internal control circuits

Reference voltage input and active-low shutdown control pin

Output voltage pin

BLOCK DIAGRAM

V_CNTL

Thermal

Limit

Current

Limit

V_REF

V_OUT

Shutdown

GND

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UR6515A

LINEAR INTEGRATED CIRCUIT



ABSOLUTE MAXIMUM RATING (unless otherwise specified)

PARAMETER

SYMBOL

V_CNTL

V_IN

RATINGS

UNIT

V_CNTLControl Voltage

V_INSupply Voltage

TO-252-5

TO-263-5

1.471

1.923

+125

Power Dissipation (T_A=25°C)

P_D

Junction Temperature

Storage Temperature

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

RATINGS

UNIT

°C/W

TO-252-5

TO-263-5

TO-252-5

TO-263-5

Junction to Ambient (Note 1)

Junction to Case

θ_JA

θ_JC

7.7

Note: θ_JAis measured in the natural convection at T_A= 25°C on a high effective thermal conductivity test board of

JEDEC 51-7 thermal measurement standard.



RECOMMENDED OPERATING CONDITIONS (Note 1)

PARAMETER

SYMBOL

V_CNTL

V_IN

RATINGS

5 or 3 ± 5%

UNIT

V_CNTLControl Voltage

V_INSupply Voltage

V_REFInput Voltage

2.5 ~ 1.5 ± 3%

1.25 ~ 0.75 ± 3%

-40 ~ +125

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 V_OUTtracks the VREF with additional voltage offset and load regulation.



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

(V_IN=2.5V/1.8V, V_CNTL=3.3V, V_REF=1.25V/0.9V, C_OUT= 10µF (Ceramic))

PARAMETER

INPUT CURRENT

SYMBOL

TEST CONDITIONS

I_OUT=0A

MIN

-20

TYP

MAX UNIT

Operation Current of V_CNTL

Standby Current

I_CNTL

I_STB

2.5

V_REF<0.2V, R_LOAD=180Ω

μA

OUTPUT VOLTAGE (DDR/DDR II/DDR III)

Output Voltage Offset (V_REF-V_OUT

Load Regulation(DDR1/2)

PROTECTION

)

V_OS

I_OUT=0A

ΔV_LOAD

I_OUT=±1.5A

0.8/1.2 2/3

Current Limit

I_LIMIT

T_SD

V_IN=2.5V/1.8V

V_CNTL=3.3V~5V

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

V_REFShutdown

125

150

°C

ΔT_SD

V_IH

V_IL

Enable

0.8

Shutdown Threshold

Shutdown

0.2

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UR6515A

LINEAR INTEGRATED CIRCUIT



TYPICAL APPLICATIONS CIRCUITS

3.3V

V_OUT

V_REF

V_CNTL

GND

V_IN

C_OUT

C_SS

C_CNTL

C_IN

2.5V/1.8V

Enable

Notes: 1. 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

, V_OUTtrack V_REF

VIN(V)

VREF =

R1 +R2

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UR6515A

LINEAR INTEGRATED CIRCUIT



TYPICAL CHARACTERISTICS

1.25 V_TT@2A Transient Response

Source

V_IN=2.5V, V_CNTL=3.3V, V_OUT=1.25V

Sink

-20

Time(200μs/Div)

0.9 V_TT@2A Transient Response

V_IN=1.8V, V_CNTL=3.3V, V_OUT=0.9V

Source

Sink

-20

Time (200μs/Div)

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UR6515A

LINEAR INTEGRATED CIRCUIT

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TYPICAL CHARACTERISTICS (Cont.)

Output Short Circuit Protection

Source

V_IN=2.5V, V_CNTL=3.3V, V_OUT=1.25V

Sink

V_IN=2.5V, V_CNTL=3.3V, V_OUT=1.25V

Time (1ms/Div)

Output Short Circuit Protection

V_IN=1.8V, V_CNTL=3.3V, V_OUT=0.9V

Output Short Circuit Protection

V_IN=1.8V, V_CNTL=3.3V, V_OUT=0.9V

Source

Sink

Time (1ms/Div)

Output Voltage vs. Temperature

V_IN=2.5V

Output Voltage vs. Temperature

1.27

0.92

V_IN=1.8

1.265

1.26

0.915

0.91

0.905

0.9

1.255

1.25

1.245

1.24

0.895

0.89

-50

-25

Temperature(°C)

-50

-25

Temperature(°C)

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UR6515A

LINEAR INTEGRATED CIRCUIT

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. UTC reserves the right to

make changes to information published in this document, including without limitation specifications and

product descriptions, at any time and without notice. This document supersedes and replaces all

information supplied prior to the publication hereof.

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