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US1050-33

5A LOW DROPOUT POSITIVE FIXED 3.3V OUTPUT REGULATOR

Unisem 

US1050-33

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 TO220 ( T )

Tab is

Vout

FRONT VIEW

3

2

1

Vin

Vout

Gnd

3 PIN PLASTIC TO263 ( M ) 2 PIN PLASTIC POWER FLEX ( P ) 3 PIN PLASTIC TO252 ( D )

FRONT VIEW

3

Tab is

2

Vout

Vin

Vout

FRONT VIEW

Tab is

Vout

3 Vin

4

FRONT VIEW

3

Vin

Tab is 4

Vout

1

Gnd

1 Adj

1

Gnd

θJT=2.7°C/W θJA=60°C/W θJA=35°C/W for 1" Square pad 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=1uF,Cout=10uF,and Tj=0 to 150°C.Typical

values refer to Tj=25°C.

PARAMETER

Output Voltage

Line Regulation

Load Regulation (note 1)

Dropout Voltage

(note 2)

Current Limit

Minimum Load Current

(note 3)

Thermal Regulation

Ripple Rejection

Adjust Pin Current Change

Temperature Stability

Long Term Stability

RMS Output Noise

SYM

Vo

TEST CONDITION

Io=10mA,Tj=25°C,Vin=5V

Io=10mA, Vin=5V

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

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

MIN TYP

3.267 3.300

3.234 3.300

MAX

3.330

3.366

0.2

0.4

UNITS

V

%

%

∆VO Note 2 , Io=5A

Vin=5V,dVo=100mV

Vin=5V

1.1 1.3

V

5.1

A

5

10

mA

30 mS PULSE,Vin-Vo=3V,Io=5A

0.01 0.02 %/W

f=120HZ ,Co=25uF Tan

Io=2.5A,Vin-Vo=3V

60

70

dB

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

0.2 5

uA

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

0.5

%

Tj=125°C,1000 Hrs

0.3 1

%

Tj=25°C 10hz<f<10khz

0.003

%Vo

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

nections are required in order to maintain accurate data.

Note 2 : Drop-out voltage is defined as the minimum

differential 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.

2-34

Rev. 1.1

10/27/00

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