AMC7584-XXT [ETC]

7A LOW DROPOUT REGULATOR; 7A低压差稳压器


型号：	AMC7584-XXT
厂家：	ETC
描述：	7A LOW DROPOUT REGULATOR 7A低压差稳压器稳压器
文件：	总7页 (文件大小：472K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AMC DOC. #: AMC7584_E (LF)

Feb 2005

AMC7584

DD MICROTECH CORP.

7A L^OWD^ROPOUTR^EGULATOR

DESCRIPTION

FEATURES

The AMC7584 series is a high performance low dropout

regulator rated for 7A output current. It is designed for use

in applications requiring low dropout characteristics over

rated current range. The AMC7584 series offers fixed 2.5V,

3.3V, 5V and adjustable output voltage versions. In addition,

the AMC7584 series features the device protections including

over current and thermal shutdown. Also, reverse battery

protection scheme limits the reverse current when the input

voltage falls below the output.

ꢀ

Input-Output differential of typical

1.1V at 7A and low quiescent current

Output current is excess of 7A

Reverse battery protection

ꢀ

ꢁ

Short circuit protection

Internal thermal overload protection

Available in 3L plastic TO-220 and

surface mount 3L TO-263 packages

Pin assignment identical to EZ1585B

and LT1585A series.

ꢁ

APPLICATIONS

PACKAGE PIN OUT

ꢀ

Pentium^ꢀProcessor Supplies

PowerPC^TMSupplies

Computer Add-On Cards

Other Applications Requiring Low

Dropout Voltage Over Rated Current.

V_IN

V_out

Gnd/Adj

3-Pin Plastic TO-220

(Top View)

AMC7584-2.5 – 2.5V Fixed

AMC7584-3.3 – 3.3V Fixed

AMC7584-5.0 – 5.0V Fixed

AMC7584-ADJ– Adjustable

V_IN

V_out

Gnd/Adj

3-Pin Plastic TO-263

Surface Mount

(Top View)

ORDER INFORMATION

Plastic TO-263

3-pin

Plastic TO-220

T_A(^OC)

3-pin

0 to 70

AMC7584-XXT

AMC7584-XXST

AMC7584-XXTF (Lead Free)

AMC7584-ADJT

AMC7584-XXSTF (Lead Free)

AMC7584-ADJST

AMC7584-ADJTF (Lead Free)

AMC7584-ADJSTF (Lead Free)

Note: 1.All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e.,

AMC7584-X.XSTT).

2.The letter “F” is marked for Lead Free process.

www.addmtek.com

AMC7584

7A LOW DROPOUT REGULATOR

AMC DOC. #: AMC7584_E (LF)

Feb 2005

TYPICAL APPLICATION

2.5V/3.3V/5V

AMC7584-

X.X

V_IN≥ 4V

10µF

22µF

AMC7584-X.X application schematic

AMC7584 -

ADJ

V_IN

V_OUT

ADJ

*C1

10µF

**C2

22µF

* REQUIRED IF REGULATOR IS

LOCATED FAR FROM POWER

SUPPLY FILTER

** DESIGN C2 AS CLOSE TO V_OUTPIN

AS POSSIBLE

V_OUT= V_REF(1+(R2/R1)) + I_ADJR2

AMC7584-ADJ application schematic

www.addmtek.com

AMC7584

7A LOW DROPOUT REGULATOR

AMC DOC. #: AMC7584_E (LF)

Feb 2005

ABSOLUTE MAXIMUM RATINGS (Note 1)

Input Voltage (V_IN)

Operating Junction temperature

Storage Temperature Range

Lead temperature (Soldering, 10 seconds)

150^OC

-65^OC to 150^OC

300^OC

Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.

Currents are positive into, negative out of the specified terminal.

THERMAL DATA

T, ST PACKAGE:

3.0^OC /W

45^OC /W

Thermal Resistance-Junction to Tab, θ_JT

Thermal Resistance-Junction to Ambient, θ_JA

The θ_JAnumbers are guidelines for the thermal performance of the device/pc-board system.

T_J= T_A+ (P_D× θ_JA)., all of the above assume no ambient airflow.

BLOCK DIAGRAM

V_IN

V_OUT

THERMAL

LIMIT

1.25V

V_REF

GND

AMC7584-X.X circuit schematic

V_IN

1.25V

V_REF

THERMAL

LIMIT

V_OUT

ADJ

AMC7584-ADJ circuit schematic

www.addmtek.com

AMC7584

7A LOW DROPOUT REGULATOR

AMC DOC. #: AMC7584_E (LF)

Feb 2005

RECOMMENDED OPERATING CONDITIONS

Recommended Operating Conditions

Parameter

Symbol

Units

Min.

4.0

Typ.

Max.

Input Voltage

V_IN

I_O

Load Current (with adequate heatsinking)

Input Capacitor (V_INto GND)

0.010

1.0

µF

Output Capacitor with ESR of 10Ω max., (V_OUTto GND)

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, these specifications apply over the operating ambient temperature of 0^OC to +70^OC for

AMC7584; I_O= 10mA, C_OUT= 10 µF, and are for DC characteristics only. (Low duty cycle pulse testing techniques

are used which maintains junction and case temperatures equal to the ambient temperature.)

AMC7584

Parameter

Symbol

Test Conditions

V_IN= 4V, T_A= 25^OC

Units

Min. Typ. Max.

2.475 2.500 2.525

AMC7584-2.5

Output Voltage

V_O

AMC7584-3.3

AMC7584-5.0

3.267 3.300 3.333

4.950 5.000 5.050

V_IN= V_OUT+ 2V, T_A= 25^OC

1.238 1.250 1.262

1.230 1.250 1.270

0.005 0.2

Reference

Voltage

AMC7584-ADJ V_REF

I_O= 10 mA to 7A

4V ≤ V_IN≤ 7V

Line Regulation (Note 2)

AMC7584-2.5

V_OI

V_IN= 4V, 10mA ≤ I_O≤ 7A

Load regulation

(Note 2)

AMC7584-3.3

AMC7584-5.0

AMC7584-ADJ

V_OL

0.05 0.2

V_IN= V_OUT+ 2V, 10mA ≤ I_O≤ 7A

I_O= 100mA

4V ≤ V_IN≤ 7V

0.010 0.030

1.100 1.300

Dropout Voltage

I_O= 7A

Quiescent Current

I_Q

I_ADJ

I_CL

4V ≤ V_IN≤ 7V, 100mA ≤ I_O≤ 7A

4V ≤ V_IN≤ 7V

Adj pin current

(AMC7584-ADJ only)

120

µA

Current Limit

µV_RMS

mV/1000hr

Output Noise Voltage (Note 3)

Long Term Stability (Note 3)

Ripple rejection (Note 3)

V_{O RMS}10HZ – 100kHZ, I_O= 5mA

150

R_Rf_O= 120HZ, 1V_RMS, I_O= 100mA

Note 2: Line and load regulation is guaranteed up to maximum power dissipation determined by input/output

differential and the output current. However, the maximum power will not be available over the full

input/output voltage range.

Note 3: These parameters, although guaranteed, are not tested in production prior to shipment

www.addmtek.com

AMC7584

7A LOW DROPOUT REGULATOR

AMC DOC. #: AMC7584_E (LF)

Feb 2005

APPLICATION INFORMATION:

ꢂ

Thermal Consideration

Maximum Power Calculation:

_J(MAX)– T_A(MAX)

P_D(MAX)

θ_JA

T_J(^OC): Maximum recommended junction temperature

T_A(^OC): Ambient temperature of the application

θ_JA(^OC/W):

Junction-to-junction temperature thermal resistance of the package, and other heat dissipating

materials.

The maximum power dissipation of a single-output regulator :

_D(MAX)= [(V_IN(MAX)- V_OUT(NOM))] × I_OUT(NOM)+ V_IN(MAX)× I_Q

Where: V_OUT(NOM)= the nominal output voltage

_OUT(NOM)= the nominal output current, and

I_Q= the quiescent current the regulator consumes at I_OUT(MAX)

V_IN(MAX)= the maximum input voltage

Then

θ_JA= (150 C – T_A) / P_D

Thermal consideration:

When power consumption is over about 1.2W( at 70^oC ambient temperature), additional heat sink is required to control the

junction temperature below 125 ^OC.

The junction temperature is: Tj = P_D(θ_JT+ θ_CS+ θ_SA) + T_A

P_D:Dissipated power.

_JT:Thermal resistance from the junction to the mounting tab of the package.

θ_CS: Thermal resistance through the interface between the IC and the surface on which it is mounted. (typically,

_CS< 1.0°C / W)

θ_SA:Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink).

If PC Board copper is going to be used as a heat sink, below table can be used to determine the appropriate size of

copper foil required. For multi-layered PCB, these layers can also be used as a heat sink. They can be connected with

several through hole vias.

PCB heat sink size (mm²) 500

1000

1500

2000

3000

4000

5000

PCB θ_SA(°C / W )

Recommended figure of PCB area used as a heat sink.

through hole vias

(Bottom View)

(Top View)

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AMC DOC. #: AMC7584_D (LF)

March 2004

AMC7584

7A L^OWD^ROPOUTR^EGULATOR

3-Pin Plastic TO-220 (T)

INCHES

MILLIMETERS

MIN TYP MAX MIN TYP MAX

0.140

0.190 3.56

0.070 1.14

0.045 0.51

0.045 0.30

0.650 14.22

0.420 9.65

0.110 2.29

0.210 4.83

0.055 0.51

0.270 5.84

0.115 2.03

0.580 12.7

0.161 3.53

0.135 2.54

4.83

1.78

1.14

16.51

10.67

2.79

5.33

1.40

6.86

2.92

14.73

4.09

3.43

6.35

SEATING PLAN

b1 0.045

0.020

0.012

0.560

0.380

0.090

e1 0.190

0.020

H1 0.230

J1 0.080

0.500

0.139

0.100

0.250

3-Pin Surface Mount TO-263 (ST)

INCHES

MILLIMETERS

MIN TYP MAX MIN TYP MAX

0.160

0.020

0.190 4.06

0.039 0.51

0.055 1.14

4.83

0.99

1.40

b2 0.045

0.015 TYP.

0.38 TYP.

c2 0.045

0.055 1.14

0.380 8.64

0.405 9.65

1.40

9.65

0.340

0.380

10.29

0.100 BSC

2.54 BSC

0.575

0.625 14.61

0.110 2.29

0.115

0.070 1.27

15.88

2.79

2.92

1.78

L1 0.090

L3 0.050

www.addmtek.com

AMC DOC. #: AMC7584_D (LF)

March 2004

AMC7584

7A L^OWD^ROPOUTR^EGULATOR

IMPORTANT NOTICE

ADD Microtech (ADDM) reserves the right to make changes to its products or to discontinue any integrated circuit

product or service without notice, and advises its customers to obtain the latest version of relevant information to

verify, before placing orders, that the information being relied on is current.

A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe

property or environmental damage. ADDM integrated circuit products are not designed, intended, authorized, or

warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of

ADDM products in such applications is understood to be fully at the risk of the customer. In order to minimize

risks associated with the customer’s applications, the customer should provide adequate design and operating

safeguards.

ADDM assumes to no liability to customer product design or application support. ADDM warrants the performance

of its products to the specifications applicable at the time of sale.

U.S.

Asia Pacific region

ADD Microtech Corp

13F, NO. 287, Sec. 3, Nan Jing E. Rd.,

Taipei, Taiwan 105

ADD Microtech Inc.

492 Altamont Drive

Milpitas, CA 95035

TEL: (408) 9410420

FAX: (408) 9410864

TEL: 2-27132800

FAX: 2-27132805

www.addmtek.com

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