LX8819 Microsemi Corporation, LX8819 Datasheet

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LX8819

Manufacturer Part Number
LX8819
Description
Dual Channel 1a Low Dropout Regulator
Manufacturer
Microsemi Corporation
Datasheet
Copyright © 2003
Revision 1.0a, 4/29/2005
positive-voltage linear regulator. This
dual regulator has one fixed output
coupled with an adjustable output.
Each channel features a low dropout
and a high accuracy.
with a flexible power management
solution, minimal printed circuit board
area, and shorter design cycles.
amp independently with a regulator
design optimized for system efficiency
by consuming minimal ground current
while directing quiescent current to
the load.
trimming of the internal voltage
reference enabling precise output
IMPORTANT: For the most current data, consult MICROSEMI’s website:
The LX8819 is a dual channel
The LX8819 provides designers
Each channel can supply up to one
The
TM
V
IN
LX8819
= 5V
22 F
0 to 125
T
J
features
(°C)
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8819-33CDT-TR)
D E S C R I P T I O N
Output V
on-chip
VIN
GND
(Pin 4)
Adj.
Adj.
8819
ADJ
Voltages (typically ±1% of its specified
value)
transistor has a low dropout voltage
even at full output current (V
typical @ 1A).
Protection are integrated on-chip and
operate independently for each of the
regulator output.
a low-value output capacitor (typically
2.2µF on the outputs) allowing the
designers
component selection.
power
power dissipation and ease of assembly
using surface mount technology.
1
VOUT2
VOUT1
Thermal and Short Circuit Current
The LX8819 regulator is stable with
Microsemi’s S-PAK and D-PAK
Output V
P R O D U C T H I G H L I G H T
P A C K A G E O R D E R I N F O
(Pin 5)
Integrated Products Division
3.3
2.5
packages
while
®
Microsemi
http://www.microsemi.com
flexibility
2
221
499
DF
the
Transition DC: 0515
LX8819-33CDF
LX8819-25CDF
enable
RoHS Compliant
Dual Channel 1A Low Dropout Regulator
Bipolar
Plastic S-PAK
5 pin
in
DO
maximum
10 F
10 F
< 1.25V
external
output
V
V
OUT2
OUT1
D
DT
ATA
= 3.3V/2.5V @ 1A
= 1.8V @ 1A
LX8819-33CDT
LX8819-25CDT
S
Two Independent Regulated
Outputs
Accurate Output Voltages
Typical Dropout of 1.25V at 1A
and 1.1V at 500mA
Independent Thermal and
Current Limit Protection
Low Profile 5 Lead SMT Power
Package
Low Tolerance Load
Regulation
Wide DC Supply Voltage of
3.5V to 10V
Loop Stability Independent of
Output Capacitor Type
5V to 3.3V / ADJ Regulators
Hard Disk Drives, CD-ROMs
ADSL and Cable Modems
Battery Charging Circuits
Instrumentation
PC Peripherals
HEET
5-Pin
Plastic D-PAK
K E Y F E A T U R E S
A P P L I C A T I O N S
LX8819
Page 1

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LX8819 Summary of contents

Page 1

... J (Pin 4) Adj 125 Adj. 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 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Dual Channel 1A Low Dropout Regulator Voltages (typically ±1% of its specified ...

Page 2

... REF R ⎝ ⎠ 2 – The input and output bypass capacitors should be connected to Microsemi Integrated Products Division LX8819 D S ATA HEET ACKAGE (Top View) RoHS 100% Matte Tin Lead Finish TAB is GND VOUT2 VOUT1 ...

Page 3

... Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit Minimum Load Current Adjust Pin Bias Current FIXED OUTPUT (OUTPUT 2) Output Voltage – LX8819-33 Output Voltage – LX8819-25 Line Regulation Load Regulation Dropout Voltage Current Limit Minimum Load Current ENTIRE REGULATOR ...

Page 4

... Figure 1 – Simplified Block Diagram Microsemi Integrated Products Division LX8819 D S ATA HEET V 5 OUT2 ( ...

Page 5

... TM D ESCRIPTION The LX8819 is part of a family of Dual LDO (Low Drop-Out) linear regulators in Microsemi’s S-PAK power package which offer maximum power dissipation in a low profile surface mount technology. The family includes a combination of fixed and adjustable versions. channel can supply up to one amp independently with a ...

Page 6

... Given the following application parameters ° MAX ) OUT OUT OUT ( 1 MAX ) OUT ( 2 MAX ) The maximum junction temperature of the LX8819 can be calculated using the following equation REG ) 1 with − REG ) MAX ) and ( − ...

Page 7

... DIV 1.5V OUT1 200mA / DIV 10000 100000 =3.3V, I =1A OUT2 OUT2 Microsemi Integrated Products Division LX8819 D S ATA HEET = 22µF Tantalum (ESR= 232mΩ 10µF Tantalum (ESR= 198mΩ) OUT(VOUT2 1.5V OUT1 1.2A = 3.3V OUT2 Rising Load ...

Page 8

... Dim Microsemi Integrated Products Division LX8819 D S ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX 9.27 9.52 0.365 0.375 7.87 8.13 0.310 0.320 1.78 2.03 0.070 0.080 2.80 3.10 0.110 0.122 1.50 1.75 0.059 0.069 ...

Page 9

... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2003 Revision 1.0a, 4/29/2005 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Dual Channel 1A Low Dropout Regulator D ATA Microsemi Integrated Products Division LX8819 S HEET Page 9 ...

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