IRU1011-33PBF [INFINEON]

1.3A LOW DROPOUT POSITIVE FIXED REGULATOR; 1.3A低压差固定正稳压器


型号：	IRU1011-33PBF
厂家：	Infineon
描述：	1.3A LOW DROPOUT POSITIVE FIXED REGULATOR 1.3A低压差固定正稳压器稳压器
文件：	总6页 (文件大小：111K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Data Sheet No.PD94544 revA

IRU1011-33(PbF)

1.3A LOW DROPOUT POSITIVE FIXED REGULATOR

FEATURES

DESCRIPTION

Stable with Ceramic Capacitor

Guaranteed < 1.3V Dropout at Full Load Current

Fast Transient Response

The IRU1011-33 is a fixed linear regulator and it is ca-

pable of supplying 1.3A of continuous current over line

and temperature range. The IRU1011-33 is stable with

low value ceramic capacitors, allowing designers flex-

ibility in external component selection. The output is pro-

tected by both current limit and thermal shutdown.

Output Current Limiting

Built-In Thermal Shutdown

APPLICATIONS

High Efficiency Linear Regulator

Hard Disk Drivers, CD-ROMs, DVDs

ADSL and Cable Modems

TYPICAL APPLICATION

Gnd

IRU1011-33

VOUT

3.3V

4.7uF

X5R

4.7uF

X5R

Figure 1 - Typical application of IRU1011-33.

PACKAGE, SHIPMENT and ORDER INFORMATION

PKG

PACKAGE

PARTS

T & R

DESIGN DESCRIPTION

COUNT PER TUBE PER REEL Oriantation

IRU1011-33CH

-----

3000

------

n/a

IRU1011-33CH(PbF)

3000

Fig A

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IRU1011-33(PbF)

ABSOLUTE MAXIMUM RATINGS

Input Voltage (VIN) .................................................... 10V

Operating Junction Temperature Range ..................... 0°C To 150°C

Operating Ambient Temperature Range ..................... -40°C To 125°C

Storage Temperature Range ...................................... -65°C To 150°C

CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device.

PACKAGE INFORMATION

6-PIN MLPM 3x3 (H)

θJA=32ꢀC/W

Gnd

For 1" Square Pad

Exposed Pad on

underside is con-

nected to Gnd

VIN

OUT

ELECTRICAL SPECIFICATIONS

Unless otherwise specified, these specifications apply over VIN=4.5V to 7V, IOUT=2mA to 1.3A, CIN=COUT=4.7µF

and 0ꢀC<TJ<150ꢀC.

PARAMETER

SYM

TEST CONDITION

MIN

TYP MAX UNITS

Output Voltage 3.3V

VO(3.3) 4.75V<V^IN<5.25V, 5mA≤IO≤1.3A:

TJ=25ꢀC

3.234

3.3

3.366

0ꢀC≤TJ≤150ꢀC

3.2175 3.3 3.3825

Line Regulation

Load Regulation

Dropout Voltage ∆VOUT= -1%

Current Limit

Minimum Output Current

Temperature Stability

RMS Output Noise

Ripple Rejection (VIN to Output)

Thermal Shutdown

Reg^LINE4.75V<V^IN<5.25V, IO=10mA

Reg^LOADVIN=4.75V, 10mA≤IO≤1.3A

1.1

1.9

IO=1.3A

V^IN=5.5V

1.3

IO(MIN) Note 3, 5

%Vo

ꢀC

Note 4, 5

T^J=25ꢀC, 10Hz<BW<10KHz, Note 5

VIN=5V, Note 5, f=120Hz

1.5

0.003

150

TJ(SD) 4.75V<VIN<5.25V, 0mA≤IO≤1.3A,

155

Note 5

Quiescent Current

Transient Response

Change of VOUT with Step Load ∆IOUT VIN=5V, 1.3A to 10mA, tfꢁ1µs

Change

Transient Response

Change of VOUT with

Application of V^IN

Transient Response

Short Circuit Removal

Response

IGND

VIN≤7V, 2mA≤IO≤1.3A

VIN=5V, 0mA≤IO≤50mA, TJ=25ꢀC

4.3

<4.2

5.4

∆VOUT V^IN=5V, 10mA<IO<1.3A, trꢁ1µs

±10

CIN=CO=10µF, X7R & Note 5

∆VOUT 0 to 5V step input, t^rꢁ1µs,

∆VIN 1mA≤IO≤1.3A, CIN=CO=10µF, X7R,

Note 5

∆VOUT VIN=5V, Short≤IO≤10mA,

∆IOUT CIN=CO=10µF, X7R, Note 5

@IO=Short

±10

±20

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IRU1011-33(PbF)

Note 1: Low duty cycle pulse testing with Kelvin con- Note 3: Minimum load current is defined as the mini-

nections is required in order to maintain accurate data. mum current required at the output in order for the out-

put voltage to maintain regulation.

Note 2: Dropout voltage is defined as the minimum dif-

ferential voltage between V^INand VOUT required to main- Note 4: Temperature stability is the change in output

tain regulation at VOUT. It is measured when the output from nominal over the operating temperature range.

voltage drops 1% below its nominal value.

Note 5: Guaranteed by design, but not tested in produc-

tion.

PIN DESCRIPTIONS

PIN # PIN SYMBOL PIN DESCRIPTION

No connection.

1,2,5

V^IN

The power input pin of the regulator. A minimum of input capacitance must be 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 higher than

the V^OUTpin by the amount of dropout voltage (see electrical specification) in order for the

device to regulate properly.

VOUT

The output of the regulator. A minimum of output capacitance must be connected from

this pin to ground to insure stability.

Gnd

This pin is connected with ground. It is also the tab of the package.

BLOCK DIAGRAM

VIN

VOUT

CURRENT

LIMIT

6 Gnd

1.25V

THERMAL

SHUTDOWN

Figure 2 - Simplified block diagram of the IRU1011-33.

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IRU1011-33(PbF)

APPLICATION INFORMATION

Introduction

Thermal Design

The IRU1011-33 regulator is a 3-terminal device offered The IRU1011-33 incorporates an internal thermal shut-

in a fixed output of 3.3V and it is designed specifically to down that protects the device when the junction tem-

provide an extremely low dropout voltage.

perature exceeds the allowable maximum junction tem-

perature. Although this device can operate with junction

The IRU1011-33 is designed to meet the fast current temperatures in the range of 150ꢀC, it is recommended

transient needs as well as providing an accurate initial that the selected heat sink be chosen such that during

voltage, reducing the overall system cost with the need maximum continuous load operation the junction tem-

for fewer number of output capacitors.

perature is kept below this number. The example below

shows the steps in selecting the proper surface mount

package.

Thermal Protection

When the junction temperature exceeds 150ꢀC, the in-

ternal thermal protection shuts the IRU1011-33 down.

Assuming, the following conditions:

VOUT = 3.3V

Current Limit Protection

V^IN= 5V

The IRU1011-33 provides Over Current Protection when

the output current exceeds typically 2A. The output de-

creases to limit the power dissipation.

IOUT = 1A (DC Avg)

Calculate the maximum power dissipation using the fol-

lowing equation:

Stability

PD = IOUT × (VIN - VOUT)

The IRU1011-33 requires the use of an output capacitor

as part of the frequency compensation in order to make

the regulator stable. A minimum input capacitance of

PD = 1 × (5 - 3.3) = 1.7W

4.7µF and a minimum output capacitance 4.7µF Ce- For MLPM package, we have:

ramic capacitor is needed for regulator stage as well as

RTHJA = 32ꢀC/W

TA = 45ꢀC

∆T = PD×RTHJA = 1.7×32 = 54.4

TJ = TA+∆T = 99.4ꢀC

the specified minimum loads to guarantee stability.

Transient Response and PSRR

The input and output capacitors are critical in order to

ensure good transient response and PSRR. The most

important aspects of this are capacitor selection, place- Layout Consideration

ment and trace routing. Place each capacitor as close The IRU1011-33, like many other high-speed regulators,

as physically possible to its corresponding regulator pin. requires that the output capacitors be close to the de-

Use wide traces for a low inductance path. Couple di- vice for stability. For power consideration, a ground plane

rectly to the ground and power planes as possible. The pad of approximately one-inch square on the compo-

use of low ESR capacitors is crucial to achieving good nent side must be dedicated to the device where all Gnd

results. Larger capacitance and lower ESR will improve pins are connected to dissipate the power. If a multilayer

both PSRR and transient response.

board is used, it is recommended that the inner layers of

the board are also dedicated to the size of the pad for

better thermal characteristics.

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IRU1011-33(PbF)

(H) MLPM Package

6-Pin

D/2

E/2

EXPOSED PAD

(OPTIONAL)

PIN 1

MARK AREA

(SEE NOTE 1)

NOTE 2

PIN NO. 1

TOP VIEW

SIDE VIEW

BOTTOM VIEW

PIN NO. 1

Note 1: Details of pin #1 are optional, but

must be located within the zone indicated.

The identifier may be molded, marked or

metalized features.

Note 2: If L1 Max is not called out, the met-

alized feature will extend to the exposed pad.

Thus L4 does not apply.

6-PIN 3x3

SYMBOL

DESIG

MIN

0.80

0.00

0.65

0.15

0.33

NOM

0.90

MAX

1.00

0.05

0.75

0.25

0.43

0.025

0.70

0.20

0.35

3.00 BSC

2.02

1.92

1.11

2.12

1.31

3.00 BSC

1.21

0.95

0.20

0.16

---

0.17

0.29

0.24

---

0.45

0.40

0.125

0.30

---

0.127 REF

10ꢀ

0ꢀ

12ꢀ

NOTE: ALL MEASUREMENTS ARE IN MILLIMETERS.

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IRU1011-33(PbF)

Feed Direction

Figure A - Live Bug

IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105

TAC Fax: (310) 252-7903

Visit us at www.irf.com for sales contact information

Data and specifications subject to change without notice. 8/29/2005

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IRU1011-33PBF [INFINEON]

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