SD2902RF POWER TRANSISTORS

HF/VHF/UHF N-CHANNEL MOSFETs

GOLD METALLIZATION COMMON SOURCE CONFIGURATION 2 - 500 MHz 15 WATTS 28 VOLTS 12.5 dB MIN. AT 400 MHz CLASS A OR AB OPERATION EXCELLENT THERMAL STABILITY

DESCRIPTION The SD2902 is a gold metallized N-Channel MOSfield-effect RF power transistor. It is intended foruse in 28 V DC large signal applications up to500 MHz

PIN CONNECTION

November 1999

ABSOLUTE MAXIMUM RATINGS (Tcase = 25 oC)

Symbol Parameter Value Unit

V(BR)DSS Drain Source Voltage 65 V

VDGR Drain-Gate Voltage (RGS = 1MΩ) 65 V

VGS Gate-Source Voltage ±20 V

ID Drain Current 2.5 A

PDISS Power Dissipation 58.3 W

Tj Max. Operating Junction Temperature 200 oC

TSTG Storage Temperature -65 to 150 oC

THERMAL DATA

Rth(j-c)

Rth(c-s)

Junction-Case Thermal ResistanceCase-Heatsink Thermal Resistance ∗

3.00.30

oC/WoC/W

* Determined using a flat aluminum or copper heatsink with thermal compound applied (Dow Corning 340 or equivalent).

M113epoxy sealed

®

ORDER CODE BRANDING SD2902 SD2902

1. Drain 3.Gate 2. Source 4. Source

1/8

ELECTRICAL SPECIFICATION (Tcase = 25 oC)

STATIC

Symbol Parameter Min. Typ. Max. Unit

V(BR)DSS VGS = 0V IDS = 15 mA 65 V

IDSS VGS = 0V VDS = 28 V 1.5 mA

IGSS VGS = 20V VDS = 0 V 1.0 µA

VGS(Q) VDS = 10V ID = 30 mA 1.0 6.0 V

VDS(ON) VGS = 10V ID = 1.5 A 1.6 V

gFS VDS = 10V ID = 1.5 A 0.6 mho

CISS VGS = 0V VDS = 28 V f = 1 MHz 23 pF

COSS VGS = 0V VDS = 28 V f = 1 MHz 18 pF

CRSS VGS = 0V VDS = 28 V f = 1 MHz 3.5 pF

DYNAMIC

Symbol Parameter Min. Typ. Max. Unit

POUT f = 400 MHz VDD = 28 V IDQ = 25 mA 15 W

GPS f = 400 MHz VDD = 28 V Pout = 15 W IDQ = 25 mA 12.5 13.5 dB

ηD f = 400 MHz VDD = 28 V Pout = 15 W IDQ = 25 mA 45 55 %

LoadMismatch

f = 400 MHz VDD = 28 V Pout = 15 W IDQ = 25 mA All Angles

10:1 VSWR

IMPEDANCE DATA

FREQ. ZIN (Ω) ZDL (Ω)

400 MHz 2.6 - j 6.5 7.8 + j 10

REF. 1021308K

SD2902

2/8

Capacitance vs Drain-Source Voltage

0 10 20 301

10

100

VDS. DRAIN-SOURCE VOLTAGE (VOLTS)

C,

CA

PA

CIT

AN

CE

S (

pF)

Ciss

Crss

Coss

f = 1 MHz

GC82930

Drain Current vs Gate Voltage

Maximum Thermal Resistance vs CaseTemperature

25 45 65 852.8

3.2

3.6

Tc, CASE TEMPERATURE (ºC)

RTH

(j-c)

(ºC

/W)

GC82940

Gate-Source Voltages vs Case Temperature

-25 0 25 50 75 1000.9

0.95

1

1.05

Tc, CASE TEMPERATURE (ºC)

VG

S,

GA

TE

-SO

UR

CE

VO

LTA

GE

(N

OR

MA

LIZ

ED

)

VDD = 10V

GC82960

ID = 500 mA

ID = 2 A

ID = 25 mA

ID = 1.25 A

ID =3 A

5 6 7 8 9 100

1

2

3

4

5

VGS, GATE-SOURCE VOLTAGE (VOLTS)

ID,

DR

AIN

CU

RR

EN

T (A

)

VDS = 10V

T = 25°C

T = 80°C

GC82950

T = - 20°C

TYPICAL PERFORMANCE

SD2902

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13 16 18 21 23 26 280

5

10

15

20

25

VDD, SUPPLY VOLTAGE (VOLTS)

Po

ut, O

UTP

UT

PO

WE

R (W

ATTS

) Pin = 1.6 W

Pin = .8 W

Pin = .4 W

IDQ = 25 mAf = 400 MHz

GC82990

Output Power vs Input Power

0.1 0.4 0.7 1 1.3 1.60

5

10

15

20

25

Pin, INPUT POWER (W)

Pou

t, O

UTP

UT

PO

WE

R (

W)

Vdd = 28 V

Vdd = 13.5 V

Tc= 25°Cf = 400 MHz

IDQ = 25 mA

GC82970

Output Power vs Input Power

0.1 0.4 0.7 1 1.3 1.60

5

10

15

20

25

30

Pin, INPUT POWER (W)

Pou

t, O

UTP

UT

PO

WE

R (

W) T = -20ºCT = 25º C

T = 80ºC

IDQ = 25 mA

VDD = 28 V

f = 400 MHz

GC83000

Output Power vs Voltage Supply Output Power vs Gate Voltage

-1 0 1 2 3 4 5 6 70

5

10

15

20

VGS, GATE-SOURCE VOLTAGE (VOLTS)

Pou

t, O

UTP

UT

PO

WE

R (

W)

VDD = 28 VIDQ = 25 mAf = 400 MHzPin = Constant

T = 80°C

T = -20°C

T = 25°C

GC82980

Power Gain vs Output Power

0 5 10 15 20 2511

12

13

14

15

Pout, OUTPUT POWER (W)

PG

, P

OW

ER

GA

IN (

dB)

Tc= 25°C

f = 400 MHzIDQ = 25 mA

GC83010

Efficiency vs Output Power

0 5 10 15 20 2520

30

40

50

60

70

Pout, OUTPUT POWER (W)

EF

FIC

IEN

CY

(%

)

Tc= 25°C

f = 400 MHz

IDQ = 25 mA

GC83020

TYPICAL PERFORMANCE

SD2902

4/8

400 MHz Test Circuit Schematic

400 MHz Test Circuit Component Part List

SD2902

5/8

400 MHz Test Circuit Photomaster

REF. 1022146B

Production Test Fixture

SD2902

6/8

DIM.mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 5.59 5.84 0.220 0.230

B 19.81 20.83 0.780 0.820

C 18.29 18.54 0.720 0.730

D 24.64 24.89 0.970 0.980

E 9.40 9.78 0.370 0.385

F 0.10 0.15 0.004 0.006

G 2.16 2.67 0.085 0.105

H 4.06 4.57 0.160 0.180

I 7.14 0.281

J 6.22 6.48 0.245 0.255

K 3.05 3.30 0.120 0.130

1010936D

M113 (.380 DIA 4/L N/HERM W/FLG) MECHANICAL DATA

Controlling Dimension: Inches

SD2902

7/8

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SD2902

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