LQ821_14 Datasheet, PDF (1/2 Pages) Polyfet RF Devices – RF POWER LDMOS TRANSISTOR

polyfet rf devices
LQ821
General Description
Silicon VDMOS and LDMOS
transistors designed specifically
for broadband RF applications.
Suitable for Military Radios,
Cellular and Paging Amplifier Base
Stations, Broadcast FM/AM, MRI,
Laser Driver and others.
"Polyfet"^TM process features
low feedback and output capacitances,
resulting in high F_t transistors with high
input impedance and high efficiency.
SILICON GATE ENHANCEMENT MODE
RF POWER LDMOS TRANSISTOR
20.0 Watts Push - Pull
Package Style AQ
HIGH EFFICIENCY, LINEAR
HIGH GAIN, LOW NOISE
ROHS COMPLIANT
Total
Device
Dissipation
80 Watts
Junction to
Case Thermal
Resistance
o
1.80 C/W
ABSOLUTE MAXIMUM RATINGS ( T = 25 ^oC )
Maximum
Junction
Temperature
Storage
Temperature
DC Drain
Current
Drain to
Gate
Voltage
200 ^oC
o
o
-65 C to 150 C
8.0 A
36 V
Drain to
Source
Voltage
36 V
Gate to
Source
Voltage
20 V
RF CHARACTERISTICS ( 20.0 WATTS OUTPUT )
SYMBOL PARAMETER
MIN
TYP MAX UNITS TEST CONDITIONS
Gps
Common Source Power Gain
η
Drain Efficiency
12
55
dB Idq = 0.80 A, Vds = 12.5 V, F = 500 MHz
% ^{Idq =} 0.80 A, Vds = 12.5 V, F = 500 MHz
VSWR Load Mismatch Tolerance
10:1 Relative Idq = 0.80 A, Vds = 12.5 V, F = 500 MHz
ELECTRICAL CHARACTERISTICS ( EACH SIDE )
SYMBOL PARAMETER
MIN
TYP MAX UNITS TEST CONDITIONS
Bvdss
Idss
Drain Breakdown Voltage
Zero Bias Drain Current
36
V
Ids = 0.10 mA, Vgs = 0V
1.0 mA
Vds = 12.5 V, Vgs = 0V
Igss
Gate Leakage Current
1
uA
Vds = 0V Vgs = 30V
Vgs
Gate Bias for Drain Current
2
5
V
Ids = 0.10 A, Vgs = Vds
gM
Forward Transconductance
1.0
Mho
Vds = 10V, Vgs = 5V
Rdson Saturation Resistance
0.60
Ohm
Vgs = 20V, Ids = 3.00 A
Idsat
Saturation Current
7.50
Amp
Vgs = 20V, Vds = 10V
Ciss
Common Source Input Capacitance
33.0
pF
Vds = 12.5 Vgs = 0V, F = 1 MHz
Crss
Common Source Feedback Capacitance
2.0
pF
Vds = 12.5 Vgs = 0V, F = 1 MHz
Coss Common Source Output Capacitance
24.0
pF
Vds = 12.5 Vgs = 0V, F = 1 MHz
POLYFET RF DEVICES
REVISION 10/01/2007
1110 Avenida Acaso, Camarillo, Ca 93012 Tel:[phone] FAX: [phone] EMAIL:[e-mail] URL:www.polyfet.com