GU1117A-3.3 [ETL]

1A Low Dropout Positive Adjustable or Fixed-Mode Regulator;


型号：	GU1117A-3.3
厂家：	E-TECH ELECTRONICS LTD
描述：	1A Low Dropout Positive Adjustable or Fixed-Mode Regulator
文件：	总4页 (文件大小：279K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

ISSUED DATE :2005/07/22

REVISED DATE :2006/06/01B

GTM

CORPORATION

GU1117A

1A Low Dropout Positive Adjustable or Fixed-Mode Regulator

Description

The GU1117A is a low dropout at positive adjustable or fixed-mode regulator with minimum of 1A 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. GU1117A is also well suited

for other applications such as VGA cards. GU1117A is guaranteed to have lower than 1.4V dropout at full load

current making it ideal to provide well-regulated outputs of 1.25 to 5.0 with 6.4V to 12V input supply.

Features

Ԧ1.4Vmaximum dropout full load current

ԦFast transient response

ԦOutput current limiting

ԦBuilt-in thermal shutdown

ԦGood noise rejection

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

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

GU1117A

Page: 1/4

ISSUED DATE :2005/07/22

REVISED DATE :2006/06/01B

GTM

CORPORATION

Block Diagram

Pin Descriptions

Name

I/O

Pin#

Function

A resistor divider from this pin to the Vout pin and ground sets the output voltage (Ground

only for fixed mode)

Adj (GND)

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

to ground to insure stability.

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 1.3V higher than Vout in order

for the device to regulate properly.

Vout

Vin

Absolute Maximum Ratings

Symbol

Parameter

Ratings

Unit

Vin

DC Supply Voltage

-0.3 to 12

Power Dissipation

Internally Limited

TST

TOP

Storage Temperature

-65 ~ + 150

0 ~ + 150

Operating Junction Temperature Range

GU1117A

Page: 2/4

ISSUED DATE :2005/07/22

REVISED DATE :2006/06/01B

GTM

CORPORATION

Electrical Characteristics

Parameter

Conditions

MIN

TYP

MAX UNIT

Reference Voltage

GU1117AADJ

GU1117A-1.5

GU1117A-1.8

GU1117A-2.5

GU1117A-3.3

GU1117A-5.0

Io=10mA, Tj=25к, (Vin-Vout )=1.5V

Io=10mA, Tj=25к, 3.0V≤Vin≤12V

Io=10mA, Tj=25к, 3.3V≤Vin≤12V

Io=10mA, Tj=25к, 4.0V≤Vin≤12V

Io=10mA, Tj=25к, 4.8V≤Vin≤12V

Io=10mA, Tj=25к, 6.5V≤Vin≤12V

1.225 1.250 1.275

1.470 1.500 1.530

1.764 1.800 1.836

2.450 2.500 2.550

3.235 3.300 3.365

4.900 5.000 5.100

Output Voltage

Line Regulation

GU1117A-XXX Io=10mA, Vout+1.5V<Vin<12V, Tj=25к

0.2

GU1117AADJ

GU1117A-1.5

GU1117A-1.8

GU1117A-2.5

GU1117A-3.3

GU1117A-5.0

Vin=3.3V, Vadj=0, 0mA<Io<1A, Tj=25к(Note 1,2)

Vin=3.0V, 0mA<Io<1A, TJ=25к (Note 1,2)

Vin=3.3V, 0mA<Io<1A, TJ=25к (Note 1,2)

Vin=4.0V, 0mA<Io<1A, TJ=25к (Note 1,2)

Vin=5.0V, 0mA<Io<1A, TJ=25к (Note 1,2)

Vin=8.0V, 0mA<Io<1A, TJ=25к (Note 1,2)

Load Regulation

Dropout Voltage

GU1117A-XXX Io=1A, (∆Vout=0.1% Vout)

1.3

1.4

(VIN-VOUT

)

Current Limit

GU1117A-XXX Vin-Vout=5V

1.1

Minimum Load Current Adjustable model Vin=5V

100

Adjust Pin Current

Quiescent Current

Thermal Regulation

Adjustable model Vin=12V, Io=10mA

fixed model Vin=12V, Io=0mA

=25к,30ms pulse

F=120HZ,COUT=25uF Tantalum, IOUT=1A

GU1117A-XXX IN=VOUT+3V

=10mA

0.008 0.04 %/W

Ripple Rejection

Temperature Stability

0.5

ꢀ

JA Thermal Resistance

Junction-to-Ambient(No

heat sink ;No air flow)

к/W

ꢀ

JC Thermal Resistance

Control Circuitry/Power Transistor

к/W

Junction-to-Case

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.

GU1117A

Page: 3/4

ISSUED DATE :2005/07/22

REVISED DATE :2006/06/01B

GTM

CORPORATION

Characteristics Curve

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

GU1117A

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