LX8630-00CDD データシートの表示（PDF） - Microsemi Corporation

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LX8630-00CDD

3A BiCMOS Very Low Dropout Regulators

Microsemi Corporation 



A MICROSEMI COMPANY

LX8630-xx

3A BiCMOS Very Low Dropout Regulators

PRODUCTION DATA SHEET


 

VIN

VOUT

GND

ADJ

SHDN

  






Positive supply input for the regulator. Bypass to GND with at
  
     


source is further than 1 inch from the device.

   
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regulation, rather it is needed for transient response. Size your output capacitor to meet the transient loading

requirement. If you have a very dynamic load, a larger capacitor will improve the response to these load steps.

Reference ground. The input and output bypass capacitors should be connected to this pin. The tab on the TO-

220 and TO-263 packages along with the ground pin are also used for heatsinking the device.

Feedback pin for the regulator. For the LX8630-00, the output voltage can be set by two external resistors with

the following relationship: VOUT = 1.25V * (1+RA/RB) where RA is the resistor connected between VOUT and ADJ,

RB is the resistor connected between ADJ and GND pin.

Shutdown pin. For the LX8630-00, this pin has a threshold of about VIN/2, it should be actively pulled high to

enable the regulator. This can be accomplished with a resistive pull-up. When low, it turns off the regulator and

puts the device in a low current shutdown state.

 

V IN

C IN

IN

1

OUT

5

LX8630-00

RA

SHDN

2

GND

ADJ 4

3

VREF

RB

VOUT

COUT

 RA 

VOUT = VREF 1 +



 RB 

FIGURE 1 – Typical Application

Copyright © 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 3

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