LX5518
PRODUCTION DATA SHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
WWW.Microsemi .COM
InGaP HBT 2.4 – 2.5 GHz Power Amplifier
TM
®
Copyright © 2009
Rev. 1.0, 2009-09-30
BLOCK DIAGRAM
Active Bias Network
Vref
RF
Input
RF
Output
Vc
Det
Active Bias Network
Vref
RF
Input
RF
Output
Vc
Det
3X3MM MLP PACKAGE PACKAGE ORDER INFO
LQ
Plastic QFN 3×3
16 pin
RoHS Compliant / Pb-free
LX5518LQ
Note: Available in Tape & Reel. Append the letters
“TR” to the part number. (i.e. LX5518LQ-TR)
DESCRIPTION
The LX5518 is a high gain and high
power amplifier optimized for
802.11b/g/n applications in the 2.4-2.5
GHz frequency range. The PA is
implemented as a three-stage monolithic
microwave integrated circuit (MMIC)
with active bias, on-chip input
matching, and output pre-matching.
The device is manufactured with an
InGaP/GaAs Heterojunction Bipolar
Transistor (HBT) IC process
(MOCVD). It operates with a single
positive voltage supply of 3-5V, and
provides a power gain of 30dB and an
output power of +26dBm at 5V for 3%
EVM in the 2.4-2.5GHz.
LX5518 also features an on-chip
power detector at the output port of
the PA to help reduce BOM cost and
PCB space for implementation of
power control in a typical wireless
system.
The LX5518 is available in a 16-
pin 3mm x 3mm quad flat no lead
package (QFN 3×3-16L). The
compact footprint, low profile, and
excellent thermal capability make the
LX5518 an ideal solution for
802.11b/g/n applications.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
Advanced InGaP HBT
2.4-2.5GHz Operation
Single-Polarity 3-5V Supply
Power Gain ~ 30 dB
26dBm @3%EVM,802.11g/5V
24dBm @3.5%EVM,80211g/3.3V
28dBm @CCK,802.11b/5V
27dBm @CCK,802.11b/3.3V
24.5% Efficiency @28dBm/5V
Complete On-Chip Input Match
Simple Output Match for Optimal
EVM
Temperature-Compensated On-
Chip Output Power Detector with
Wide Dynamic Range
Small Footprint: 3x3mm
2
Low Profile: 0.9mm
APPLICATIONS
802.11b/g/n
L
L
X
X
5
5
5
5
1
1
8
8
MSC
5518
936
