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A

M I C R O S E M I





C O M P A N Y

LX8630-xx

3A BiCMOS Very Low Dropout Regulators

P

RODUCTION

D

ATA

S

HEET



The LX8630 family are positive very

They are

low dropout regulators.

designed to provide a power supply for

very low headroom applications, such as

3.3V 鈥?2.5V.

BiCMOS technology

allows an

effective series pass element resistance,

R

DS(ON)

of 150m

 

 



dropout voltage of 450mV at 3A.

Low Quiescent Current and Logic-

Controlled Shutdown

help conserve

battery life and increase system efficiency.

Typical quiescent current is under 400

A

irrespective of load current, while the

Shut

     

device will enter shutdown mode when the

SHDN pin is pulled low.

Thermal and Short-Circuit Current

Limiting:

the LX8630 limits the current

when the output is shorted, protecting the

sensitive load circuits. The device will

also turn off if the junction temperature

exceeds 150擄

Available in Popular TO-220 and

TO-263 Power Packages:

adjustable

versions have five leads, and fixed output

voltage devices are supplied in three lead

packages.

 

Dropout Voltage Typically

W W W .

Microsemi

.

COM

450mV at 3A and 50mV at

10mA

Low Quiescent Current,

Typically Under 400碌A(chǔ),

irrespective of Load

Shutdown Current 10碌A(chǔ)

Adjustable Output Version in

5-Pin TO-220 & TO-263

Packages

Low Reverse Leakage

Current

Short-Circuit and Thermal

Shutdown Protection

IMPORTANT:

For the most current data, consult

MICROSEMI鈥檚

website:

http://www.microsemi.com

  

 

3.3V & 2.5V Supplies for

Memory, Microprocessors,

Clock Circuits, Etc.

Portable Equipment


 

LX8 630-xx S im plified B lock D iagra m

V

IN

C urrent

Lim it

R eference

C urrent

C harge

P um p

R

A

V

O UT

A D J*

1.25V

+

R

B

SHDN*

V

IN

/2

-

GND

R

A

R

B

-

25K

25K

R everse

V oltage

S ense

LX 8630-00

-

25K

41K

T herm al

S hutdown

* Adjustable 5 lead ve rsion only

LX 8630-25

LX 8630-33

LX8630-

XX

LX8630-

XX

   



Output

Voltage

3.3

0 to 125

2.5

ADJ(00)

T

A

(擄C)

P

Plastic TO-220

3-Pin

LX8630-33CP

LX8630-25CP

-

P

Plastic TO-220

5-Pin

-

-

LX8630-00CP

DD

Plastic TO-263

3-Pin

LX8630-33CDD

LX8630-25CDD

-

DD

Plastic TO-263

5-Pin

-

-

LX8630-00CDD

Note: Available in Tape & Reel.

Append the letter 鈥淭鈥?to the part number. (i.e. LX8630-33CDDT)

Copyright

漏

2000

Rev. 1.0a,2000-11-28

Microsemi

Linfinity Microelectronics Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 1

next

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