IRU1050-33CMPBF [INFINEON]

Fixed Positive LDO Regulator, 3.3V, 1.3V Dropout, PSSO3, PLASTIC, TO-263, 3 PIN;


型号：	IRU1050-33CMPBF
厂家：	Infineon
描述：	Fixed Positive LDO Regulator, 3.3V, 1.3V Dropout, PSSO3, PLASTIC, TO-263, 3 PIN 稳压器
文件：	总4页 (文件大小：88K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Data Sheet No. PD94127

IRU1050-33

5A LOW DROPOUT POSITIVE

FIXED 3.3V REGULATOR

DESCRIPTION

FEATURES

Guaranteed < 1.3V Dropout at Full Load Current

Fast Transient Response

The IRU1050-33 is a low dropout three-terminal fixed 3.3V

output regulator with minimum of 5A output current ca-

pability. This product is specifically designed to provide

well regulated supply for low voltage IC applications re-

quiring 3.3V output. The IRU1050-33 is guaranteed to

have <1.3V dropout at full load current making it ideal to

provide well regulated output with supply voltage as low

as 4.6V input.

1% Voltage Reference Initial Accuracy

Output Current Limiting

Built-In Thermal Shutdown

APPLICATIONS

Standard 3.3V Chip Set and Logic Applications

TYPICAL APPLICATION

330uF

Vin

Vout

Gnd

3.3V / 5A

IRU1050-33

330uF

Figure 1 - Typical application of IRU1050-33

PACKAGE ORDER INFORMATION

Tj (°C)

3-PIN PLASTIC

2-PIN PLASTIC

Ultra Thin-Pak (P)

IRU1050-33CP

2-PIN PLASTIC

TO-252 (D-Pak)

IRU1050-33CD

T0-220 (T)

TO-263 (M)

0 To 150

IRU1050-33CT

IRU1050-33CM

Rev. 1.2

06/29/01

IRU1050-33

ABSOLUTE MAXIMUM RATINGS

Input Voltage (Vin) .................................................... 7V

Power Dissipation ..................................................... Internally Limited

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

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

PACKAGE INFORMATION

3-PIN PLASTIC TO-220 (T)

3-PIN PLASTIC TO-263 (M)

2-PIN PLASTIC ULTRA THIN-PAK (P) 2-PIN PLASTIC TO-252 (D-Pak)

FRONT VIEW

Vin

Tab is

Vout

Tab is

Vout

Tab is

Vout

Tab is

Vout

Gnd

Vout

Gnd

θJA=35°C/W for 1" Square pad

Vout

Gnd

θJT=2.7°C/W θJA=60°C/W

θJA=70°C/W for 1" Square pad

θJA=70°C/W for 0.5" Sq pad

ELECTRICAL SPECIFICATIONS

Unless otherwise specified, these specifications apply over Cin=1µF, Cout=10µF, and Tj=0 to 150ꢀC.

Typical values refer to Tj=25ꢀC.

PARAMETER

SYM

TEST CONDITION

Io=10mA,Tj=25ꢀC,Vin=5V

Io=10mA, Vin=5V

Io=10mA, 4.7V<Vin<7V

Vin=5V, Vadj=0, 10mA<Io<5A

Note 2, Io=5A

MIN

TYP

MAX

UNITS

Output Voltage

3.267 3.300 3.333

3.234 3.300 3.366

Line Regulation

0.2

0.4

1.3

Load Regulation (Note 1)

Dropout Voltage (Note 2)

Current Limit

∆Vo

1.1

Vin=5V, dVo=100mV

Vin=5V

5.1

Minimum Load Current

(Note 3)

Thermal Regulation

Ripple Rejection

30ms Pulse, Vin-Vo=3V, Io=5A

f=120Hz, Co=25µF Tantalum,

Io=2.5A, Vin-Vo=3V

0.01

0.02

%/W

0.2

µA

%Vo

Adjust Pin Current Change

Temperature Stability

Long Term Stability

Io=10mA,Vin-Vo=1.5V, Tj=25ꢀC

Vin=5V, Vadj=0V, Io=10mA

Tj=125ꢀC, 1000Hrs

0.5

0.3

RMS Output Noise

Tj=25ꢀC, 10Hz<f<10KHz

0.003

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. Typically the resistor

Note 2: Dropout voltage is defined as the minimum dif- dividers are selected such that it automatically main-

ferential voltage between Vin and Vout required to main- tains this current.

tain regulation at Vout. It is measured when the output

voltage drops 1% below its nominal value.

Rev. 1.2

06/29/01

IRU1050-33

PIN DESCRIPTIONS

PIN # PIN SYMBOL

PIN DESCRIPTION

Gnd

This pin must be connected to ground plane using a low inductance short connection.

Vout

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

to ground to insure stability.

Vin

The input pin of the 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.

BLOCK DIAGRAM

Vin 3

2 Vout

1.25V

CURRENT

LIMIT

THERMAL

SHUTDOWN

1 Gnd

1050-33blk1-1.0

Figure 1 - Simplified block diagram of the IRU1050-33

APPLICATION INFORMATION

Stability

The IRU1050-33 requires the use of an output capacitor as part of the frequency compensation in order to make the

regulator stable. Typical designs for microprocessor applications use standard electrolytic capacitors with a typical

ESR in the range of 50 to 100mΩ and an output capacitance of 500 to 1000µF. Fortunately as the capacitance

increases, the ESR decreases resulting in a fixed RC time constant. The IRU1050-33 takes advantage of this

phenomena in making the overall regulator loop stable. For most applications a minimum of 100µF aluminum

electrolytic capacitor such as Sanyo MVGX series, Panasonic FA series as well as the Nichicon PL series insures

both stability and good transient response.

Rev. 1.2

06/29/01

IRU1050-33

Notes

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. 02/01

Rev. 1.2

06/29/01

IRU1050-33CMPBF [INFINEON]

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