UCC283-3, UCC283-5, UCC283-ADJ, UCC383-3, UCC383-5, UCC383-ADJ

LOW DROPOUT 3A LINEAR REGULATOR FAMILY

SLUS215B − OCTOBER 1998 − REVISED FEBRUARY 2004

1

POST OFFICE BOX 655303

Voltage Regulation

Irrespective of Load

Outputs

(3%

description

The UCC283−3/−5/−ADJ family of positive linear

series pass voltage regulators are tailored for

low-drop-out applications where low quiescent

power is important. Fabricated with a BiCMOS

technology ideally suited for low input-to-output

differential applications, the UCC283−5 passes

3 A while requiring only 0.45 V of typical input

voltage headroom (ensured 0.6-V dropout).

These regulators include reverse voltage sensing that prevents current in the reverse direction. Quiescent

current is always less than 650

µA. These devices have been internally compensated in such a way that the

need for a minimum output capacitor has been eliminated.

UCC283−3 and UCC283−5 versions are in 3-lead packages and have preset outputs at 3.3 V and 5.0 V

respectively. The output voltage is regulated to 1.5% at room temperature. The UCC283−ADJ version, in a

5-lead package, regulates the output voltage programmed by an external resistor ratio.

Short-circuit current is internally limited. The device responds to a sustained overcurrent condition by turning

dissipation during short-circuit and means heat sinks need only accommodate normal operation. On the

sets the on time. The off time is always 32

also serves as a shutdown input when pulled low.

Internal power dissipation is further controlled with thermal overload protection circuitry. Thermal shutdown

occurs if the junction temperature exceeds 165

°C. The chip remains off until the temperature has dropped 20°C.

The UCC283 series is specified for operation over the industrial range of −40

°C to 85°C, and the UCC383 series

is specified from 0

°C to 70°C. These devices are available in 3- and 5-pin TO−220 and TO−263 power packages.

Copyright

 1998−2004, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

1

VOUT

GND

2

3

VIN

4

5

ADJ

CT

TO−263−5 TD PACKAGE

(FRONT VIEW)

TO−220−5 T PACKAGE

(FRONT VIEW)

1

VOUT

GND

2

3

VIN

+

4

5

ADJ

CT

TO−220−3 T PACKAGE

(FRONT VIEW)

1

VOUT

GND

2

3

VIN

+

TO−263−3 TD PACKAGE

(FRONT VIEW)

1

VOUT

GND

2

3

VIN

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