Microsemi

Linfinity Microelectronics Division

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

Page 1

Copyright

© 2000

Rev. 0.6f,2000-09-15

LX8610-xx

1A BiCMOS Very Low Dropout Regulators

A

M I CROSEM I

COM P A N Y





The LX8610 family are positive

very low dropout regulators. They are

designed to provide a power supply for

very low headroom applications, such as

3.3V– 2.5V.

BiCMOS

technology

allows

an

effective series pass element resistance,

 

dropout voltage of 250mV at 1A.

Low Quiescent Current and Logic-

Controlled Shutdown help conserve

battery

life

and

increase

system

efficiency. Typical quiescent current is

under

400µA

irrespective

of

load

current, while the shutdown current is

only 10µA.

The device will enter

shutdown mode when the ENABLE pin

is pulled low.

Thermal & Short-Circuit Current

Limiting: the LX8610 limits the current

when the output is shorted, so protecting

sensitive load circuits. The device will

also turn off if the junction temperature

exceeds 155°C.

Available in small outline SOT-223

and 8-pin SOIC:

Adjustable versions

use the 8-pin SOIC and fixed output

voltage devices are supplied in the 3-lead

SOT-223.

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

 

 

Dropout Voltage Typically

250mA At 1A And 50mV At

10mA

Low Quiescent Current,

Under 400µA, Irrespective

Of Load

Shutdown Current 10µA

Adjustable Output Version In

8-pin SOIC Package

Fixed Outputs Of 2.5V, 3.3V

Available In 3-Pin SOT-223

Package

Low Reverse Leakage

Current

Short-Circuit And Thermal

Shutdown Protection







3.3V & 2.5V Supplies For

Memory, Microprocessors,

Clock Circuits, Etc.

Portable Equipment


 


 

ENABLE*

* Adju stable 8 lead ve rs ion on ly

Reverse

V oltage

S ense

T herm al

S hutdown

V

IN

GN D

ADJ*

V

OU T

Current

Lim it

Charge

Pum p

R

A

R

B

LX8610-xx Sim p lified B lock D iagram

1.25V

Reference

Current

V

IN

/2

LX8610-0 0

LX8610-2 5

LX8610-3 3

25K

25K

41K

25K

R

A

R

B

--

  

°C)

8-PIN

3.3

LX8610-33CST

LX8610-33CDM

2.5

LX8610-25CST

LX8610-25CDM

0 to 125°C

ADJ (00)

–

LX8610-00CDM

Note: Available in Tape & Reel.

Append the letter “T” to the part number. (i.e. LX8610CDMT)