GU1086 [ETL]

1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator;


型号：	GU1086
厂家：	E-TECH ELECTRONICS LTD
描述：	1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator
文件：	总4页 (文件大小：304K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ISSUED DATE :2005/03/14

REVISED DATE :2006/06/01C

GTM

CORPORATION

GU1086

1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

Description

The GU1086 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1.5A output current

capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications

such as high-speed bus termination and low current 3.3V logic supply. GU1086 is also well suited for other

applications such as VGA cards. GU1086 is guaranteed to have <1.4V dropout at full load current making it

ideal to provide well-regulated outputs of 1.25 to 5.0V with 4.7 to 12V input supply by different output voltage.

Features

Ԧ3-Terminal Adjustable or fixed 1.5V,1.8V,2.5V,3.3V,5.0V

Ԧ1.4V Maximum Dropout at Full Load current

ԦFast Transient response

ԦBuilt-in Thermal Shutdown

ԦOutput current limiting

Package Dimensions

Millimeter

REF.

Min.

Max.

4.80

1.00

0.30

0.5

Min.

Max.

1.45

1.47

9.0

4.40

0.76

0.00

0.36

1.25

1.17

8.6

2.54 REF.

1.50 REF.

ꢀ

14.6

0˚

1.27 REF.

15.8

8˚

2.29

9.80

2.79

10.4

Typical Circuit

Block Diagram

GU1086

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ISSUED DATE :2005/03/14

REVISED DATE :2006/06/01C

GTM

CORPORATION

Pin Descriptions

Name

I/O

Pin#

Function

Adj (GND)

Adjustable (Ground only for fixed mode)

The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to

ground to insure stability.

Vout

Vin

The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground

to insure that the input voltage does not sag below the minimum dropout voltage during the load

transient response. This pin must always be 1.4V higher than Vout in order for the device to

regulate properly.

Absolute Maximum Ratings

Symbol

Parameter

Ratings

Unit

DC Supply Voltage

-0.3 to 12

Power Dissipation

Internally Limited

Storage Temperature

-65 ~ + 150

0 ~ + 150

Operating Junction Temperature Range

Electrical Characteristics

Parameter

Conditions

MIN

TYP

1.250

1.500

1.800

2.500

3.300

5.000

MAX

1.275

1.530

1.836

2.550

3.365

5.100

0.2

UNIT

Reference Voltage

GU1086-ADJ

GU1086-1.5

GU1086-1.8

GU1086-2.5

GU1086-3.3

GU1086-5.0

GU1086-XXX

GU1086-ADJ

GU1086-1.5

GU1086-1.8

GU1086-2.5

GU1086-3.3

GU1086-5.0

Io=10mA, T

=25к, (Vin-Vout )=1.5V

=25к, 3.0V≤Vin≤12V

=25к, 3.3V≤Vin≤12V

=25к, 4.0V≤Vin≤12V

=25к, 4.8V≤Vin≤12V

=25к, 6.5V≤Vin≤12V

1.225

1.470

1.764

Output Voltage

2.450

3.235

4.900

Line Regulator

Io=10mA, Vout+1.5<Vin<12

Vin=3.3V, 0mA<Io<1.5A, T

Vin=3.0V, 0mA<Io<1.5A, T

Vin=3.3V, 0mA<Io<1.5A, T

Vin=4.0V, 0mA<Io<1.5A, T

Vin=5.0V, 0mA<Io<1.5A, T

Vin=8.0V, 0mA<Io<1.5A, T

=25к(Note 1,2)

Load Regulation

Dropout Voltage

(Vin-Vout)

GU1086-XXX

Io=1.5A(∆Vout=1% Vout)

1.3

1.4

Current Limit

Vin-Vout=5V

1.6

Minimum Load Current Adjustable model

Vin=5V

Adjust Pin Current

Quiescent Current

Thermal Regulation

Adjustable model

fixed model

Vin=12V, Io=10mA

Vin=12V, Io=0mA

100

%/W

=25к, 30ms pulse

0.008

0.04

F=120Hz, COUT=25uF, Tantalum, Io=1.5A

Ripple Rejection

GU1086-XXX

Io=10mA

Vin=Vout+3V

Temperature Stability

0.5

Thermal Resistance

Junction–to-Ambient

(No heat sink ;No air flow)

к/W

Thermal Resistance

Junction-to-Case

Control Circuitry/Power Transistor

0.65/2.7

Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured

at a constant junction Temperature by low duty cycle pulse testing. Load regulation is measured at the output lead =1/18” from the

package.

Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the

difference in input and output and the output current. Guaranteed maximum power dissipation will not be available over the full

input/output range.

GU1086

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ISSUED DATE :2005/03/14

REVISED DATE :2006/06/01C

GTM

CORPORATION

Functional Description

Introduction

The GU1086 adjustable or fixed-mode Low Dropout (LDO) regulator is a 3 terminal device which can easily be

programmed by internal mask change to any voltage within the range of 1.25 to Vin-1.4V. The GU1086 only needs 1.4V

differential between Vin and Vout to maintain output regulation, in addition, the output voltage tolerances are also extremely

tight and they include the transient response as port of the specification. For example, Intel VRE specification calls for a

total of ±100mV including initial tolerance, load regulation and 0 to 1.5A load step. The GU1086 is specifically designed to

meet the fast current transient needs as well as providing an accurate initial voltage, reducing the overall system cost with

the need for fewer output capacitors.

Load Regulation

Since the GU1086 is only a 3 terminal device, it is not possible to provide true remote sensing of the output voltage at the

load. But it can supply good load regulation by internal feedback bypass the external loss such as adjustable mode.

Stability

The GU1086 requires the use of an output capacitor as part of the frequency compensation in order to make the regulator

stable .For most applications a minimum of 10uF aluminum electrolytic capacitor insures both stability and good transient

response.

Thermal Design

The GU1086 incorporates an internal shutdown that protects the device when the junction temperature exceeds the

maximum allowable junction temperatures. Although this device can operate with junction temperatures in the range of

150к, it is recommended that the selected heat sink be chosen such that during maximum continuous load operation the

junction temperature is kept below the temperature.

Layout Consideration

The output capacitors must be located as close to the Vout terminal of the device as possible .It is recommended to use a

section of a layer of the PC board as a plane to connect the Vout pin to the output capacitors to prevent any high frequency

oscillation that may result due to excessive trace inductance.

GU1086

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ISSUED DATE :2005/03/14

REVISED DATE :2006/06/01C

GTM

CORPORATION

Typical Performance Characteristics

Important Notice:

All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM.

GTM reserves the right to make changes to its products without notice.

GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems.

GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.

Head Office And Factory:

Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C.

TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785

China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China

TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165

GU1086

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GU1086 [ETL]

相关型号：

GU1086-1.5

GU1086-1.8

GU1086-2.5

GU1086-3.3

GU1086-5.0

GU1086-ADJ

GU1086-XXX

GU1117A

GU1117A

GU1117A-1.5

GU1117A-1.8

GU1117A-2.5