Copyright © 2012 Microsemi Page 1
Rev. 1.0 12/19/2012 Analog Mixed Signal Group
One Enterprise Aliso Viejo, CA 92656 USA (800) 713-4113, (949) 380-6100, (949) 215-4996 fax
LX5509
InGaP HBT 5GHz Power Amplifier
Abridged Datasheet
Description
The LX5509 is a power amplifier optimized for
802.11ac/a/n applications in the 5.15-5.85 GHz
frequency range. The LX5509 includes a three-stage PA,
active bias, input/output matching, and a harmonic
filter.
The device is manufactured with an InGaP/GaAs
Heterojunction Bipolar Transistor (HBT) IC process
(MOCVD). It operates with a single positive voltage
supply of 3.3V, and provides power gain of 28dB and
output powers of 19-20 and 19.5-20.5 dBm at 3.3V
across the frequency band for 1.8 and 3% dynamic
EVM(DEVM), respectively.
The 2nd and 3rd harmonics are lower than -
45dBm/MHz over the frequency band due to an
integrated harmonic filter. The LX5509 also features an
on-chip power detector to help reduce BOM cost and
PCB space for implementation of power control in a
typical wireless system.
The LX5509 is available in a 20-pin 4mm x 4mm quad
flat no lead package (QFN 4
4-20L). The compact
footprint, low profile, and excellent thermal capability
make the LX5509 an ideal solution for 802.11ac/a/n
applications.
Advanced InGaP HBT
5.15-5.85GHz Operation
Single-Polarity 3.3V Supply
Power Gain ~ 28dB
19-20dBm @1.8%DEVM for 802.11ac
19.5-20.5dBm @3%DEVM for 802.11a
<-45dBm/MHz for 2
nd
Harmonic
<-45dBm/MHz for 3
rd
Harmonic
Complete Input/Output Match
Temperature-Compensated
On-Chip Output Power Detector
Small Footprint: 4x4mm
2
Low Profile: 0.9mm
RoHS Compliant for Pb-free
802.ac/a/n
