LX8819 Datasheet, PDF (1/9 Pages) Microsemi Corporation – Dual Channel 1A Low Dropout Regulator

LX8819
TM
®
Dual Channel 1A Low Dropout Regulator
DATA SHEET
DESCRIPTION
The LX8819 is a dual channel Voltages (typically ±1% of its specified
positive-voltage linear regulator. This value) while the Bipolar output
dual regulator has one fixed output transistor has a low dropout voltage
coupled with an adjustable output. even at full output current (V_DO < 1.25V
Each channel features a low dropout typical @ 1A).
and a high accuracy.
Thermal and Short Circuit Current
The LX8819 provides designers Protection are integrated on-chip and
with a flexible power management operate independently for each of the
solution, minimal printed circuit board regulator output.
area, and shorter design cycles.
The LX8819 regulator is stable with
Each channel can supply up to one a low-value output capacitor (typically
amp independently with a regulator 2.2µF on the outputs) allowing the
design optimized for system efficiency designers flexibility in external
by consuming minimal ground current component selection.
while directing quiescent current to Microsemi’s S-PAK and D-PAK
the load.
power packages enable maximum
The LX8819 features on-chip power dissipation and ease of assembly
trimming of the internal voltage using surface mount technology.
reference enabling precise output
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
KEY FEATURES
ƒ Two Independent Regulated
Outputs
ƒ Accurate Output Voltages
ƒ Typical Dropout of 1.25V at 1A
and 1.1V at 500mA
ƒ Independent Thermal and
Current Limit Protection
ƒ Low Profile 5 Lead SMT Power
Package
ƒ Low Tolerance Load
Regulation
ƒ Wide DC Supply Voltage of
3.5V to 10V
ƒ Loop Stability Independent of
Output Capacitor Type
APPLICATIONS
ƒ 5V to 3.3V / ADJ Regulators
ƒ Hard Disk Drives, CD-ROMs
ƒ ADSL and Cable Modems
ƒ Battery Charging Circuits
ƒ Instrumentation
ƒ PC Peripherals
V_IN = 5V
22 F
VIN
VOUT2
8819
GND VOUT1
ADJ
221
V_OUT2 = 3.3V/2.5V @ 1A
10 F
V_OUT1 = 1.8V @ 1A
10 F
499
T_J (°C)
0 to 125
PACKAGE ORDER INFO
Output V₁
(Pin 4)
Adj.
Adj.
Output V₂
(Pin 5)
3.3
2.5
Plastic S-PAK
DF 5 pin
RoHS Compliant
Transition DC: 0515
LX8819-33CDF
LX8819-25CDF
Plastic D-PAK
DT 5-Pin
LX8819-33CDT
LX8819-25CDT
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8819-33CDT-TR)
Copyright © 2003
Revision 1.0a, 4/29/2005
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
Page 1