MDS70
70 Watts, 50 Volts, Pulsed
Avionics 1030 - 1090MHz
GENERAL DESCRIPTION
CASE OUTLINE
55CX, STYLE 1
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.
ABSOLUTE MAXIMUM RATINGS
Maximum Power Dissipation @ 25oC2
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 + 150oC
+ 200oC
ELECTRICAL CHARACTERISTICS @ 25 OC
SYMBOL
CHARACTERISTICS
TEST CONDITIONS
Pout
Power Out
Pg
Power Gain
RT
Rise Time
F = 1030-1090 MHz
Vcc = 50 Volts
Pin = 6.5W
ηc
Collector Efficiency
VSWR
1
Load Mismatch Tolerance
BVebo
Emitter to Base Breakdown
BVces
Collector to Emitter Breakdown
DC - Current Gain
hFE
θjc
1
Thermal Resistance
Notes: 1) At rated pulse conditions
Rev C: August 2010
MIN
70
10.3
2
Pulse Mod: Mode S
1090 MHz
Ie = 5 mA
Ic = 25 mA
Ic = 500 mA, Vce = 5 V
TYP
MAX
95
UNITS
Watts
11.65
dB
80
ns
35
%
5:1
3.5
65
20
Volts
Volts
0.8
o
C/W
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
Pout(W)
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
8
9
10
Pin(W)
1030MHz (N=1)
1030MHz (N=128)
1090MHz (N=1)
1090MHz (N=128)
M DS70 (Effic vs Pin)
45.0
40.0
35.0
Effic(%)
30.0
25.0
20.0
15.0
10.0
5.0
0.0
0
1
2
3
4
5
6
7
8
9
10
Pin(W)
1030MHz
1090MHz
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
Zsource (ohms)
3.0 – j4.8
2.8 – j4.5
Zsource
Zload (ohms)
5.3 – j1.2
6.2 – j1.2
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.