IRU1010

2

Rev. 1.4

06/29/01

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

2-PIN PLASTIC TO-252 (D-Pak)

3-PIN PLASTIC SO-223 (Y)

2-PIN ULTRA THIN-PAK (P)

8-PIN PLASTIC SOIC (S)

PARAMETER

SYM

TEST CONDITION

MIN

TYP

MAX

UNITS

Reference Voltage

Vref

Io=10mA, Tj=25!C, (Vin-Vo)=1.5V 1.238 1.250

1.262

V

Io=10mA, (Vin-Vo)=1.5V

1.225 1.250

1.275

Line Regulation

Io=10mA, 1.3V<(Vin-Vo)<7V

0.2

%

Load Regulation (Note 1)

Vin=3.3V, Vadj=0, 10mA<Io<1A

0.4

%

Dropout Voltage (Note 2)

∆Vo

Note 2 , Io=1A

1.1

1.3

V

Current Limit

Vin=3.3V, dVo=100mV

1.1

A

Minimum Load Current

Vin=3.3V, Vadj=0V

5

10

mA

(Note 3)

Thermal Regulation

30ms Pulse, Vin-Vo=3V, Io=1A

0.01

0.02

%/W

Ripple Rejection

f=120Hz, Co=25µF Tantalum,

Io=0.5A, Vin-Vo=3V

60

70

dB

Adjust Pin Current

Iadj

Io=10mA, Vin-Vo=1.5V, Tj=25!C,

Io=10mA, Vin-Vo=1.5V

55

120

µA

Adjust Pin Current Change

Io=10mA, Vin-Vo=1.5V, Tj=25!C

0.2

5

µA

Temperature Stability

Vin=3.3V, Vadj=0V, Io=10mA

0.5

%

Long Term Stability

Tj=125!C, 1000Hrs

0.3

1

%

RMS Output Noise

Tj=25!C, 10Hz<f<10KHz

0.003

%Vo

Vout

Adj

NC

NC

Vin

Vout

Vout

Vout

4

3

2

1

5

6

7

8

TOP VIEW

Adj

Vout

Vin

Tab is

Vout

3

1

2

TOP VIEW

Adj

Tab is

Vout

Vin

1

3

FRONT VIEW

Tab is

Vout

Adj

Vin

FRONT VIEW

1

3

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

Typical values refer to Tj=25!C.

ELECTRICAL SPECIFICATIONS

Note 1: Low duty cycle pulse testing with Kelvin con-

nections is required in order to maintain accurate data.

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

ferential voltage between Vin and Vout required to main-

tain regulation at Vout. It is measured when the output

voltage drops 1% below its nominal value.

Note 3: Minimum load current is defined as the mini-

mum current required at the output in order for the out-

put voltage to maintain regulation. Typically, the resistor

dividers are selected such that it automatically main-

tains this current.