MDS70
70 Watts, 50 Volts, Pulsed
Avionics 1030 - 1090MHz
GENERAL DESCRIPTION
The MDS70 is a COMMON BASE bipolar transistor. It is designed for
MODE S pulsed systems in the frequency band 1030-1090 MHz. The device
has gold thin-film metallization for proven highest MTTF. The transistor
includes input prematch for broadband capacity. Low thermal resistance
package reduces junction temperature, extends life.
CASE OUTLINE
55CX, STYLE 1
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation @ 25
o
C
2
Maximum Voltage and Current
BVces
Collector to Base Voltage
BVebo Emitter to Base Voltage
Ic
Collector Current
Maximum Temperatures
Storage Temperature
Operating Junction Temperature
225 Watts
65 Volts
3.5 Volts
5.0 Amps
- 65 to + 150
o
C
+ 200
o
C
ELECTRICAL CHARACTERISTICS @ 25
O
C
SYMBOL
Pout
Pg
RT
η
c
VSWR
1
CHARACTERISTICS
Power Out
Power Gain
Rise Time
Collector Efficiency
Load Mismatch Tolerance
TEST CONDITIONS
F = 1030-1090 MHz
Vcc = 50 Volts
Pin = 6.5W
Pulse Mod: Mode S
1090 MHz
2
MIN
70
10.3
35
5:1
TYP
MAX
95
11.65
80
UNITS
Watts
dB
ns
%
BVebo
BVces
h
FE
Emitter to Base Breakdown
Collector to Emitter Breakdown
DC - Current Gain
Thermal Resistance
Ie = 5 mA
Ic = 25 mA
Ic = 500 mA, Vce = 5 V
3.5
65
20
0.8
Volts
Volts
o
θjc
1
C/W
Notes: 1) At rated pulse conditions
Rev C: August 2010
2) Mode S Burst: 0.5us (on/off), N=128, Per=6.4ms; LTDC=1%
Microsemi reserves the right to change, without notice, the specifications and information contained herein. Visit
our web site at
www.microsemi.com
or contact our factory direct.
M DS70 (Pout vs Pin)
110
100
90
80
70
Pout(W)
60
50
40
30
20
10
0
0
1
2
3
4
5
Pin(W)
1030MHz (N=1)
1030MHz (N=128)
1090MHz (N=1)
1090MHz (N=128)
6
7
8
9
10
M DS70 (Effic vs Pin)
45.0
40.0
35.0
30.0
Effic(%)
25.0
20.0
15.0
10.0
5.0
0.0
0
1
2
3
4
5
Pin(W)
1030MHz
1090MHz
6
7
8
9
10
Microsemi reserves the right to change, without notice, the specifications and information contained herein. Visit
our web site at
www.microsemi.com
or contact our factory direct.
Microsemi reserves the right to change, without notice, the specifications and information contained herein. Visit
our web site at
www.microsemi.com
or contact our factory direct.
MDS70 IMPEDANCE DATA:
FREQUENCY
1030
1090
Z
source
(ohms)
3.0 – j4.8
2.8 – j4.5
Z
load
(ohms)
5.3 – j1.2
6.2 – j1.2
Zsource
Zload
Microsemi reserves the right to change, without notice, the specifications and information contained herein. Visit
our web site at
www.microsemi.com
or contact our factory direct.
Microsemi reserves the right to change, without notice, the specifications and information contained herein. Visit
our web site at
www.microsemi.com
or contact our factory direct.
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