Datasheet LET9045S Datasheet (SGS Thomson Microelectronics)

Ldmos Enhanced Technology in Plastic Package

N-CHANNEL ENHANCEMENT-MODE LATERAL
MOSFETs

• EXCELLENT THERMAL STABILITY

• COMMON SOURCE CONFIGURATION

• P

• NEW RF PLASTIC PACKAGE

• HIGH GAIN

• ESD PROTECTION

• AVAILABLE IN TAPE & REEL wit h TR SUFFIX

= 45 W with 17 dB gain MIN @ 945 MHz /

OUT

28V

LET9045S

RF POWER TRANSISTORS

TARGET DATA

PowerSO-10RF

(straight lead)

ORDER CODE

LET9045S

BRANDING

LET9045S

DESCRIPTION

PIN CONNECTION

The LET9045S is a common sourc e N-Channel,
enhancement-mode lateral Field-Effect RF power
transistor. It is designed for high gain, broad band

SOUR CE

commercial and industrial applications. It operates
at 28 V in common source mode at frequencies up
to 1 GHz. LET9045S boasts the excellent gain,

linearity and reliability of ST’s latest LDMOS
technology mounted in the first true SMD pla stic
RF power package, PowerSO-10RF. LET9045S’s

GATE

DRAIN

superior linearity performance makes it an ideal
solution for base station applications.

The PowerSO-10 plastic package, designed to
offer hig h reliability, is the first ST JEDE C
approved, high power SM D package. I t has b een
specially optimized for RF needs and offers
excellent RF performances and ease of assembly.

ABSOLUTE MAXIMUM RATINGS (T

Symbol Parameter Value Unit

V

(BR)DSS

V

GS

I

D

P

DISS

Tj Max. Operating Junction Temperature 165 °C

T

STG

Drain-Source Voltage 65 V
Gate-Source Voltage -0.5 to +15 V
Drain Current 5 A
Power Dissipation 160 W

Storage Temperature -65 to +150 °C

CASE

= 25°C)

Mounting recommendations are available in

www.st.com/rf/ (look for application note AN1294)

THERMA L D ATA

R

th(j-c)

February, 27 2003

Junction -Case Thermal Resistance 0.85 °C/W

1/9

LET9045S

ELECTRICAL SPECIFICATION (T

CASE

= 25°C)

STATIC

Symbol Test Conditions Min. Typ. Max. Unit

V

(BR)DSS

I

DSS

I

GSS

V

GS(Q)

V

DS(ON)

G

FS

C

ISS

C

OSS

C

RSS

DYNAMIC

Symbol Test Conditions Min. Typ. Max. Unit

G

P

η

D

IMD3

P

1dB

G

P

η

D

Load

mismatch

VGS = 0 V IDS = 1 mA
VGS = 0 V VDS = 28 V
VGS = 5 V VDS = 0 V
VDS = 28 V

= 250 mA

ID

VGS = 10 V ID = 3 A
VDS = 10 V ID = 3 A
VGS = 0 V VDS = 28 V f = 1 MHz
VGS = 0 V VDS = 28 V f = 1 MHz
VGS = 0 V VDS = 28 V f = 1 MHz

(

f = 945 MHz

VDD = 28 V IDQ = 250 mA P
VDD = 28 V IDQ = 250 mA P
V

DD

)

= 28 V IDQ = 250 mA P

= 45 W PEP

OUT

= 45 W PEP

OUT

= 45 W PEP

OUT

VDD = 28 V IDQ = 250 mA
VDD = 28 V IDQ = 250 mA P
VDD = 28 V IDQ = 250 mA P

= 28 V IDQ = 250 mA P

V

DD

OUT
OUT
OUT

= 45 W
= 45 W
= 45 W

ALL PHASE ANGLES

65 V

1 µA
1 µA

2.0 5.0 V

0.6 V

2.0 mho
60 pF
33 pF

2.2 pF

17 dB

44 %

-28 dBc

60 W

17.8 dB
59 %

10:1 VSWR

DYNAMIC (

f = 925 - 960 MHz

)

Symbol Test Conditions Min. Typ. Max. Unit

P

1dB

G

P

η

D

VDD = 28 V IDQ = 250 mA
VDD = 28 V IDQ = 250 mA P
VDD = 28 V IDQ = 250 mA P

OUT
OUT

= 45 W
= 45 W

55 W

17.2 dB
55 %

ESD PROTECTION CHARACTERISTICS

Test Conditions Class

Human Body Model 2
Machine Model M3

MOISTURE SENS IT I VITY LEVEL

Test Methodology Rating

J-STD-020B MSL 3

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TYPICAL PERFORMANCE
Power Gain Vs Output Power

LET9045S

Power Gain Vs Output Power

1000

100

C (pF)

10

1

Ciss

Coss

Crss

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

Vds (V)

f = 1 M Hz

Efficiency Vs Output Power

70

60

50

40

Nd (%)

30

20

10

0

0 10203040506070

Pout (W)

Vdd = 28 V
Idq = 250 mA
f = 945 MHz

20

19

18

17

16

Gp (dB)

15

14

13

12

Idq = 600 mA
Idq = 400 mA

Idq = 100 mA
Idq = 250 mA

Idq = 100 mA

Vdd = 28 V
f = 945 MHz

1 10 100

Pout (W)

Ouput Power Vs Drain Voltage

90

80

70

60

50

40

Pout (W)

30

20

10

0

10 12 14 16 18 20 22 24 26 28 30 32

Vdd (V)

Pin = 1.5 W

Pin = 1 W

Idq = 250 mA
f = 945 MHz

Drain Current Vs Gate-Source Voltage

1.5

1.0

Idq (A)

0.5

Vdd = 28 V

0.0
012345

Vgs ( V)

3/9

LET9045S

TYPICAL PERFORMANCE

Power Gain Vs Frequency

(BROADBAND)

Efficiency Vs Frequency

20

18

16

Gp (dB)

14

Vdd = 28 V
Pout = 50 W
Idq = 250 mA

12

910 920 930 940 950 960 970

f (MHz)

Input Return Loss Vs Frequency

0

-4

-8

80

75

70

65

60

Nd (%)

55

50

45

40

910 920 930 940 950 960 970

f (MHz)

Vdd = 28 V
Idq = 250 mA
Pout = 50 W

RL (dB)

-12

-16

-20
910 920 930 940 950 960 970

f (MHz)

Vdd = 28 V
Idq = 250 mA
Pout = 50 W

4/9

TEST CIRCUIT SCHEMATIC

G

+

G

V

+

LET9045S

+

V

D

D

+

RF
IN

RF
OUT

TEST CIRCUIT COMPONENT PART LIST

COMPONENT DESCRIPTION

C1, C8, C9, C13 47pF ATC 100B SURFACE MOUNT CERAMIC CHIP CAPACITOR
C2, C7 0.8-8.0pF GIGA TRIM VARIABLE CAPACITOR
C3, C4, C5, C6 7.5pF ATC 100B SURFACE MOUNT CERAMIC CHIP CAPACITOR
C10 1000pF ATC 100B SURFACE MOUNT CERAMIC CHIP CAPACITOR
C11, C15 0.1µF / 500V SURFACE MOUNT CERAMIC CHIP CAPACITOR
C12 10µF / 50V ALUMINUM ELECTROLYTIC RADIAL LEAD CAPACITOR
C14 100pF ATC 100B SURFACE MOUNT CERAMIC CHIP CAPACITOR
C16 220µF / 63V ALUMINUM ELECTROLYTIC RADIAL LEAD CAPACITOR
R1 18KΩ, 1W SURFACE MOUNT CHIP RESISTOR
R2 4.7MΩ, 1W SURFACE MOUNT CHIP RESISTOR
R3 120Ω, 2W SURFACE MOUNT CHIP RESISTOR
FB1, FB2 SHIELD BEAD SURFACE MOUNT EMI

L1, L2

INDUCTOR, 5TURNS AIR WOUND #22AWG, ID=0.059[1.49], NYLON COATED
MAGNET WIRE

5/9

LET9045S

TEST CIRCUIT

TEST CIRCUIT PHOTOMASTER

PD57030S

4 inches

6.4 inches

6/9

TAPE & REEL DIMENSIONS

mm

MIN. TYP. MAX

Ao 17.9 18.0 18.1
Bo 9.7 9.8 9.9
Ko 4.15 4.25 4.35
K1 3.6 3.7 3.8

F 11.4 11.5 11.6

P1 23.9 24.0 24.1

W 23.7 24.0 24.3

LET9045S

7/9

LET9045S

PowerSO-10RF Straight Lead MECHANICAL DATA

DIM.

A1 1.62 1.67 1.72 0.064 0.065 0.068
A2 3.4 3.5 3.6 0.134 0.137 0.142
A3 1.2 1.3 1.4 0.046 0.05 0.054
A4 0.15 0.2 0.25 0.005 0.007 0.009

a 0.2 0.007
b 5.4 5.53 5.65 0.212 0.217 0.221
c 0.23 0.27 0.32 0.008 0.01 0.012

D 9.4 9.5 9.6 0.370 0.374 0.377

D1 7.4 7.5 7.6 0.290 0.295 0.298

E 15.15 15.4 15.65 0.595 0.606 0.615
E1 9.3 9.4 9.5 0.365 0.37 0.375
E2 7.3 7.4 7.5 0.286 0.292 0.294
E3 5.9 6.1 6.3 0.231 0.24 0.247

F 0.5 0.019

G 1.2 0.047
R1 0.25 0.01
R2 0.8 0.031

T1 6 deg 6 deg
T2 10 deg 10 deg

MIN. TYP. MAX MIN. TYP. MAX

mm Inch

Note (1): Resin protrusions not included (max value: 0.15 mm per side)

CRITICAL DIMENSIONS:

- Overall width (L)

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LET9045S

p

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