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UMIL 25
25 Watts, 28 Volts, Class AB
Defcom 225 - 400 MHz
GENERAL DESCRIPTION
The UMIL 25 is an input matched COMMON EMITTER broadband transistor
specifically intended for use in the 225-400 MHz frequency band. It may be
operated in Class AB or C. Gold metallization and silicon diffused resistors
ensure ruggedness and high reliability.
CASE OUTLINE
55HV, Style 2
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation @ 25 C 70 Watts
o
Maximum Voltage and Current
BVces Collector to Emitter Voltage 60 Volts
BVebo Emitter to Base Voltage 4.0 Volts
Ic Collector Current 3 A
Maximum Temperatures
Storage Temperature - 65 to +150 C
o
Operating Junction Temperature +200 C
o
ELECTRICAL CHARACTERISTICS @ 25 C
O
SYMBOL CHARACTERISTICS TEST CONDITIONS MIN TYP MAX UNITS
Pout
Pin
Pg
ηc
VSWR
Power Output
Power Input
Power Gain
Efficiency
Load Mismatch Tolerance
F = 400 MHz
Vcc = 28 Volts
25
8.9 10
50
3.2
5:1
Watts
Watts
dB
%
BVebo
BVces
BVceo
Cob
hFE
θjc
Emitter to Base Breakdown
Collector to Emitter Breakdo wn
Collector to Emitter Breakdo wn
Output Capacitance
DC - Current Gain
Thermal Resistance
Ie = 5 mA
Ic = 50 mA
Ie = 50 mA
Vcb = 28 V, F = 1 MHz
Vce = 5 V, Ic = 500 A
4.0
65
33
10 22 27
2.5
Volts
Volts
Volts
pF
C/W
o
Issue August 1996
UMIL25
August 1996
