LX8815 Datasheet, PDF (1/5 Pages) Microsemi Corporation – Dual Channel 1A Low Dropout Regulator


A MICROSEMI COMPANY
LX8815
Dual Channel 1A Low Dropout Regulator
PRELIMINARY


The LX8815 is a dual channel voltage reference enabling precise output
positive-voltage linear regulator. This voltages, typically ±1% of it’s specified
dual regulator has either one fixed value, while the BiPolar output transistor
output coupled with an adjustable has a low dropout voltage even at full
output or two fixed outputs. Each output current (V_DO < 1.1V typ. @ 1A).
channel features low-dropout and high Thermal and Short Circuit Current
accuracy.
Protection are integrated on-chip and
The LX8815 provides designers operate independently for each regulator
with a flexible power management output.
solution, minimal printed circuit board The LX8815 regulator is stable with a
area, and shorter design cycles.
low-value output capacitor, typically
Each channel can supply up to one _{3.3µF tantalum or 4.7µF ceramic on the}
amp independently with a regulator _{outputs, allowing designers flexibility in}
design optimized for system efficiency _{external component selection.}
by consuming minimal ground current _{Linfinity’s S-PAK power package}
and directing quiescent current to the _{offers maximum power dissipation and}
load.
ease of assembly using surface mount
The LX8815 features on-chip _technology.
trimming of the internal
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
 

Two Independent Regulated
Outputs

Accurate Output Voltages

Max. Dropout of 1.1V at Rated
Current

Independent Thermal and
Current Limit Protection

Low Profile 5 Lead SMT Power
Package

Low Tolerance Line (0.2%) and
Load (0.4%) Regulation

Wide DC Supply Voltage of 4.0V
to 12.0V

Loop Stability Independent of
Output Capacitor Type
  

5V to 3.3V Linear Regulator

Low Voltage Logic Supplies

Active SCSI Terminators

Battery Charging Circuits

Instrumentation

PC Peripherals
 
   
V_IN
1
R₃
0 . 1Ω
+
C₁
-
1 0µF
BIAS
1.25V
V_REF
+
-
GND
3
5
V_OUT1
C₂
4 . 7µF
V_OUT
2
= 1.25× _{}1+
R₁
R₂

+
I _ADJ
×
R₂
4
V_OUT2
R₁
Adjustable or Fixed
2
C₃
4.7µF
R₂
Note: Application circuit above using ceramic capacitors, C ₁ requires R₃ (0.075 to 0.3Ω). For Tantalum capacitors: R ₃ is not used
a n d C₁, C₂, and C₃ > 2 µF. R1 and R2 used with LX88xx-xx only.
Copyright © 2000
Rev. 0.2a, 2000-11-20
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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