View MRF1517NT1_1283435.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Freescale Semiconductor Technical Data
Document Number: MRF1517N Rev. 5, 9/2006
RF Power Field Effect Transistor
N - Channel Enhancement - Mode Lateral MOSFET
Designed for broadband commercial and industrial applications at frequencies to 520 MHz. The high gain and broadband performance of this device makes it ideal for large- signal, common source amplifier applications in 7.5 volt portable FM equipment. D * Specified Performance @ 520 MHz, 7.5 Volts Output Power -- 8 Watts Power Gain -- 11 dB Efficiency -- 55% * Capable of Handling 20:1 VSWR, @ 9.5 Vdc, 520 MHz, 2 dB Overdrive Features * Characterized with Series Equivalent Large - Signal G Impedance Parameters * Excellent Thermal Stability * Broadband UHF/VHF Demonstration Amplifier S Information Available Upon Request * N Suffix Indicates Lead - Free Terminations. RoHS Compliant. * Available in Tape and Reel. T1 Suffix = 1,000 Units per 12 mm, 7 Inch Reel.
MRF1517NT1
520 MHz, 8 W, 7.5 V LATERAL N - CHANNEL BROADBAND RF POWER MOSFET
CASE 466 - 03, STYLE 1 PLD - 1.5 PLASTIC
Table 1. Maximum Ratings
Rating Drain - Source Voltage Gate - Source Voltage Drain Current -- Continuous Total Device Dissipation @ TC = 25C Derate above 25C Storage Temperature Range Operating Junction Temperature
(2) (1)
Symbol VDSS VGS ID PD Tstg TJ
Value - 0.5, +25 20 4 62.5 0.50 - 65 to +150 150
Unit Vdc Vdc Adc W W/C C C
Table 2. Thermal Characteristics
Characteristic Thermal Resistance, Junction to Case Symbol RJC Value (3) 2 Unit C/W
Table 3. Moisture Sensitivity Level
Test Methodology Per JESD 22 - A113, IPC/JEDEC J - STD - 020 Rating 1 Package Peak Temperature 260 Unit C
1. Not designed for 12.5 volt applications. T T 2. Calculated based on the formula PD = J - C RJC 3. MTTF calculator available at http://www.freescale.com/rf. Select Tools/Software/Application Software/Calculators to access the MTTF calculators by product.
NOTE - CAUTION - MOS devices are susceptible to damage from electrostatic charge. Reasonable precautions in handling and packaging MOS devices should be observed.
(c) Freescale Semiconductor, Inc., 2006. All rights reserved.
MRF1517NT1 1
RF Device Data Freescale Semiconductor
Table 4. Electrical Characteristics (TC = 25C unless otherwise noted)
Characteristic Off Characteristics Zero Gate Voltage Drain Current (VDS = 35 Vdc, VGS = 0) Gate - Source Leakage Current (VGS = 10 Vdc, VDS = 0) On Characteristics Gate Threshold Voltage (VDS = 7.5 Vdc, ID = 120 Adc) Drain - Source On - Voltage (VGS = 10 Vdc, ID = 1 Adc) Forward Transconductance (VDS = 10 Vdc, ID = 2 Adc) Dynamic Characteristics Input Capacitance (VDS = 7.5 Vdc, VGS = 0, f = 1 MHz) Output Capacitance (VDS = 7.5 Vdc, VGS = 0, f = 1 MHz) Reverse Transfer Capacitance (VDS = 7.5 Vdc, VGS = 0, f = 1 MHz) Functional Tests (In Freescale Test Fixture) Common - Source Amplifier Power Gain (VDD = 7.5 Vdc, Pout = 8 Watts, IDQ = 150 mA, f = 520 MHz) Drain Efficiency (VDD = 7.5 Vdc, Pout = 8 Watts, IDQ = 150 mA, f = 520 MHz) Gps -- -- 14 70 -- -- dB % Ciss Coss Crss -- -- -- 66 38 6 -- -- -- pF pF pF VGS(th) VDS(on) gfs 1 -- -- 1.7 0.5 0.9 2.1 -- -- Vdc Vdc S IDSS IGSS -- -- -- -- 1 1 Adc Adc Symbol Min Typ Max Unit
MRF1517NT1 2 RF Device Data Freescale Semiconductor
VGG C9 C8 + C7 R3 B1 R2 C18
B2 C17 C16 + C15 VDD
L1 C6 R1 Z6 N1 RF INPUT C1 C2 C3 C4 C5 DUT Z1 Z2 Z3 Z4 Z5 C10 C11 C12 C13 Z7 Z8 Z9 Z10 C14 N2 RF OUTPUT
B1, B2 C1 C2, C3, C4, C10, C12, C13 C5, C11 C6, C18 C7, C15 C8, C16 C9, C17 C14 L1 N1, N2
Short Ferrite Bead, Fair Rite Products (2743021446) 300 pF, 100 mil Chip Capacitor 0 to 20 pF, Trimmer Capacitor 43 pF, 100 mil Chip Capacitor 120 pF, 100 mil Chip Capacitor 10 F, 50 V Electrolytic Capacitor 0.1 F, 100 mil Chip Capacitor 1,000 pF, 100 mil Chip Capacitor 330 pF, 100 mil Chip Capacitor 55.5 nH, 5 Turn, Coilcraft Type N Flange Mount
R1 R2 R3 Z1 Z2 Z3 Z4 Z5, Z6 Z7 Z8 Z9 Z10 Board
15 , 0805 Chip Resistor 1.0 k, 1/8 W Resistor 33 k, 1/2 W Resistor 0.315 x 0.080 Microstrip 1.415 x 0.080 Microstrip 0.322 x 0.080 Microstrip 0.022 x 0.080 Microstrip 0.260 x 0.223 Microstrip 0.050 x 0.080 Microstrip 0.625 x 0.080 Microstrip 0.800 x 0.080 Microstrip 0.589 x 0.080 Microstrip Glass Teflon(R), 31 mils, 2 oz. Copper
Figure 1. 480 - 520 MHz Broadband Test Circuit
TYPICAL CHARACTERISTICS, 480 - 520 MHz
10 Pout , OUTPUT POWER (WATTS) 0 500 MHz 480 MHz 520 MHz IRL, INPUT RETURN LOSS (dB) -5
8
6
-10 520 MHz
480 MHz
4
-15
500 MHz -20 VDD = 7.5 Vdc -25
2 VDD = 7.5 Vdc 0 0 0.2 0.4 0.6 Pin, INPUT POWER (WATTS) 0.8 1.0
1
2
3
4 5 6 7 8 Pout, OUTPUT POWER (WATTS)
9
10
Figure 2. Output Power versus Input Power
Figure 3. Input Return Loss versus Output Power
MRF1517NT1 RF Device Data Freescale Semiconductor 3
TYPICAL CHARACTERISTICS, 480 - 520 MHz
18 500 MHz 16 520 MHz 14 GAIN (dB) 12 10 8 VDD = 7.5 Vdc 6 1 2 3 4 5 6 7 8 Pout, OUTPUT POWER (WATTS) 9 10 10 1 2 3 5 6 7 8 4 Pout, OUTPUT POWER (WATTS) 9 10 11 Eff, DRAIN EFFICIENCY (%) 480 MHz 70 60 50 40 30 20 VDD = 7.5 Vdc 520 MHz 500 MHz 480 MHz 80
Figure 4. Gain versus Output Power
Figure 5. Drain Efficiency versus Output Power
12 Pout , OUTPUT POWER (WATTS) 10 8 520 MHz 6 4 2 0 0 200 400 600 IDQ, BIASING CURRENT (mA) 800 1000 Pin = 27 dBm VDD = 7.5 Vdc 480 MHz 500 MHz
80 70 480 MHz 500 MHz 60 520 MHz 50 Pin = 27 dBm VDD = 7.5 Vdc 0 200 400 600 IDQ, BIASING CURRENT (mA) 800 1000
Eff, DRAIN EFFICIENCY (%)
40
30
Figure 6. Output Power versus Biasing Current
Figure 7. Drain Efficiency versus Biasing Current
12 Pout , OUTPUT POWER (WATTS) 10 8 6 480 MHz 4 2 0 5 6 7 8 9 10 VDD, SUPPLY VOLTAGE (VOLTS) Pin = 27 dBm IDQ = 150 mA 500 MHz 520 MHz Eff, DRAIN EFFICIENCY (%)
80 70 500 MHz 60 520 MHz 50 480 MHz
40
Pin = 27 dBm IDQ = 150 mA 5 6 7 8 9 10
30 VDD, SUPPLY VOLTAGE (VOLTS)
Figure 8. Output Power versus Supply Voltage
Figure 9. Drain Efficiency versus Supply Voltage
MRF1517NT1 4 RF Device Data Freescale Semiconductor
VGG C8 C7 + C6 R3 B1 R2 C17
B2 + C16 C15 C14 VDD
L1 C5 R1 Z5 N1 RF INPUT C1 C2 C3 C4 DUT Z1 Z2 Z3 Z4 C10 C9 C11 C12 Z6 Z7 Z8 Z9 C13 N2 RF OUTPUT
B1, B2 C1, C13 C2, C3, C4, C10, C11, C12 C5, C17 C6, C14 C7, C15 C8, C16 C9 L1 N1, N2
Short Ferrite Bead, Fair Rite Products (2743021446) 300 pF, 100 mil Chip Capacitor 0 to 20 pF, Trimmer Capacitor 130 pF, 100 mil Chip Capacitor 10 F, 50 V Electrolytic Capacitor 0.1 F, 100 mil Chip Capacitor 1,000 pF, 100 mil Chip Capacitor 33 pF, 100 mil Chip Capacitor 55.5 nH, 5 Turn, Coilcraft Type N Flange Mount
R1 R2 R3 Z1 Z2 Z3 Z4, Z5 Z6 Z7 Z8 Z9 Board
12 , 0805 Chip Resistor 1.0 k, 1/8 W Resistor 33 k, 1/2 W Resistor 0.617 x 0.080 Microstrip 0.723 x 0.080 Microstrip 0.513 x 0.080 Microstrip 0.260 x 0.223 Microstrip 0.048 x 0.080 Microstrip 0.577 x 0.080 Microstrip 1.135 x 0.080 Microstrip 0.076 x 0.080 Microstrip Glass Teflon(R), 31 mils, 2 oz. Copper
Figure 10. 400 - 440 MHz Broadband Test Circuit
TYPICAL CHARACTERISTICS, 400 - 440 MHz
10 9 Pout , OUTPUT POWER (WATTS) 8 7 6 5 4 3 2 1 0 0 0.1 0.2 0.3 Pin, INPUT POWER (WATTS) 0.4 0.5 VDD = 7.5 Vdc -25 1 2 3 4 5 6 7 Pout, OUTPUT POWER (WATTS) 8 9 10 420 MHz 440 MHz 400 MHz IRL, INPUT RETURN LOSS (dB) -5 400 MHz 420 MHz -15 440 MHz 0
-10
-20 VDD = 7.5 Vdc
Figure 11. Output Power versus Input Power
Figure 12. Input Return Loss versus Output Power
MRF1517NT1 RF Device Data Freescale Semiconductor 5
TYPICAL CHARACTERISTICS, 400 - 440 MHz
17 15 13 GAIN (dB) 11 9 7 VDD = 7.5 Vdc 5 1 2 3 4 5 6 7 8 Pout, OUTPUT POWER (WATTS) 9 10 0 1 2 3 5 6 7 8 4 Pout, OUTPUT POWER (WATTS) 400 MHz 440 MHz 420 MHz Eff, DRAIN EFFICIENCY (%) 70 60 50 40 400 MHz 30 20 10 VDD = 7.5 Vdc 9 10 11 440 MHz 420 MHz
Figure 13. Gain versus Output Power
Figure 14. Drain Efficiency versus Output Power
12 Pout , OUTPUT POWER (WATTS) 10 8 6 4 2 0 0 200 400 600 IDQ, BIASING CURRENT (mA) 800 1000 Pin = 25.5 dBm VDD = 7.5 Vdc 400 MHz 420 MHz 440 MHz Eff, DRAIN EFFICIENCY (%)
80 70 440 MHz 60 400 MHz 420 MHz
50
40
Pin = 25.5 dBm VDD = 7.5 Vdc 0 200 400 600 IDQ, BIASING CURRENT (mA) 800 1000
30
Figure 15. Output Power versus Biasing Current
Figure 16. Drain Efficiency versus Biasing Current
12 Pout , OUTPUT POWER (WATTS) 10 8 440 MHz 6 4 2 0 5 6 7 8 9 10 VDD, SUPPLY VOLTAGE (VOLTS) Pin = 25.5 dBm IDQ = 150 mA 420 MHz Eff, DRAIN EFFICIENCY (%) 400 MHz
80 70 420 MHz 60 440 MHz 50 400 MHz
40
Pin = 25.5 dBm IDQ = 150 mA 5 6 7 8 9 10
30 VDD, SUPPLY VOLTAGE (VOLTS)
Figure 17. Output Power versus Supply Voltage
Figure 18. Drain Efficiency versus Supply Voltage
MRF1517NT1 6 RF Device Data Freescale Semiconductor
VGG C8 C7 + C6 R3 B1 R2 C17
B2 C16 C15 VDD + C14
L1 C5 R1 Z5 N1 RF INPUT C1 C2 C3 C4 DUT Z1 Z2 Z3 Z4 C10 C9 C11 C12 Z6 Z7 Z8 Z9 C13 N2 RF OUTPUT
B1, B2 C1 C2, C3, C4, C10, C11, C12 C5, C17 C6, C14 C7, C15 C8, C16 C9 C13 L1 N1, N2
Short Ferrite Bead, Fair Rite Products (2743021446) 240 pF, 100 mil Chip Capacitor 0 to 20 pF, Trimmer Capacitor 130 pF, 100 mil Chip Capacitor 10 mF, 50 V Electrolytic Capacitor 0.1 mF, 100 mil Chip Capacitor 1,000 pF, 100 mil Chip Capacitor 39 pF, 100 mil Chip Capacitor 330 pF, 100 mil Chip Capacitor 55.5 nH, 5 Turn, Coilcraft Type N Flange Mount
R1 R2 R3 Z1 Z2 Z3 Z4, Z5 Z6 Z7 Z8 Z9 Board
15 , 0805 Chip Resistor 1.0 k, 1/8 W Resistor 33 k, 1/2 W Resistor 0.471 x 0.080 Microstrip 1.082 x 0.080 Microstrip 0.372 x 0.080 Microstrip 0.260 x 0.223 Microstrip 0.050 x 0.080 Microstrip 0.551 x 0.080 Microstrip 0.825 x 0.080 Microstrip 0.489 x 0.080 Microstrip Glass Teflon(R), 31 mils, 2 oz. Copper
Figure 19. 440 - 480 MHz Broadband Test Circuit
TYPICAL CHARACTERISTICS, 440 - 480 MHz
10 9 Pout , OUTPUT POWER (WATTS) 8 7 6 5 4 3 2 1 0 0.0 0.2 0.4 0.6 Pin, INPUT POWER (WATTS) 0.8 VDD = 7.5 Vdc -25 1 2 3 4 5 6 7 Pout, OUTPUT POWER (WATTS) 8 9 10 480 MHz 460 MHz IRL, INPUT RETURN LOSS (dB) 440 MHz -5 0
-10
460 MHz 440 MHz
-15 480 MHz -20 VDD = 7.5 Vdc
Figure 20. Output Power versus Input Power
Figure 21. Input Return Loss versus Output Power
MRF1517NT1 RF Device Data Freescale Semiconductor 7
TYPICAL CHARACTERISTICS, 440 - 480 MHz
17 440 MHz 15 Eff, DRAIN EFFICIENCY (%) 460 MHz 13 GAIN (dB) 480 MHz 11 9 7 VDD = 7.5 Vdc 5 1 2 3 6 7 8 4 5 Pout, OUTPUT POWER (WATTS) 9 10 0 1 2 3 70 60 50 40 30 20 10 VDD = 7.5 Vdc 5 6 7 8 4 Pout, OUTPUT POWER (WATTS) 9 10 11 480 MHz 440 MHz 460 MHz
Figure 22. Gain versus Output Power
Figure 23. Drain Efficiency versus Output Power
12 Pout , OUTPUT POWER (WATTS) 10 8 460 MHz 6 4 2 Pin = 27.5 dBm 0 0 200 400 600 IDQ, BIASING CURRENT (mA) 800 1000 440 MHz 480 MHz
80 70 480 MHz 60 460 MHz 440 MHz
Eff, DRAIN EFFICIENCY (%)
50
40 Pin = 27.5 dBm 30 0 200 400 600 IDQ, BIASING CURRENT (mA) 800 1000
Figure 24. Output Power versus Biasing Current
Figure 25. Drain Efficiency versus Biasing Current
12 Pout , OUTPUT POWER (WATTS) 10 8 6 4 2 Pin = 27.5 dBm 0 5 6 7 8 9 10 VDD, SUPPLY VOLTAGE (VOLTS) 440 MHz 460 MHz 480 MHz
80
Eff, DRAIN EFFICIENCY (%)
70 480 MHz 60 460 MHz 440 MHz
50
40 Pin = 27.5 dBm 30 5 6 7 8 9 10 VDD, SUPPLY VOLTAGE (VOLTS)
Figure 26. Output Power versus Supply Voltage
Figure 27. Drain Efficiency versus Supply Voltage
MRF1517NT1 8 RF Device Data Freescale Semiconductor
TYPICAL CHARACTERISTICS
109 MTTF FACTOR (HOURS X AMPS2)
108
107
106 90 100 110 120 130 140 150 160 170 180 190 200 210 TJ, JUNCTION TEMPERATURE (C) This above graph displays calculated MTTF in hours x ampere2 drain current. Life tests at elevated temperatures have correlated to better than 10% of the theoretical prediction for metal failure. Divide MTTF factor by ID2 for MTTF in a particular application.
Figure 28. MTTF Factor versus Junction Temperature
MRF1517NT1 RF Device Data Freescale Semiconductor 9
f = 440 MHz 520 Zin f = 480 MHz 520 ZOL* Zo = 10 f = 480 MHz ZOL* f = 480 MHz
Zin 480
f = 440 MHz Zin 400
440
f = 440 MHz ZOL* 400
Zo = 10
Zo = 10
VDD = 7.5 V, IDQ = 150 mA, Pout = 8 W f MHz 480 500 520 Zin Zin 1.06 +j1.82 0.97 +j2.01 ZOL* 3.51 +j0.99 2.82 +j0.75
VDD = 7.5 V, IDQ = 150 mA, Pout = 8 W f MHz 440 460 480 Zin Zin 1.62 +j3.41 1.85 +j3.35 1.91 +j3.31 ZOL* 3.25 +j0.98 3.05 +j0.93 2.54 +j0.84 Zin
VDD = 7.5 V, IDQ = 150 mA, Pout = 8 W f MHz 400 420 440 Zin 1.96 +j3.32 2.31 +j3.56 1.60 +j3.45 ZOL* 2.52 +j0.39 2.61 +j0.64 2.37 +j1.04
0.975 +j2.37 1.87 +j1.03
= Complex conjugate of source impedance.
= Complex conjugate of source impedance.
= Complex conjugate of source impedance.
ZOL* = Complex conjugate of the load impedance at given output power, voltage, frequency, and D > 50 %.
ZOL* = Complex conjugate of the load impedance at given output power, voltage, frequency, and D > 50 %.
ZOL* = Complex conjugate of the load impedance at given output power, voltage, frequency, and D > 50 %.
Note: ZOL* was chosen based on tradeoffs between gain, drain efficiency, and device stability.
Input Matching Network
Device Under Test
Output Matching Network
Z
in
Z
* OL
Figure 29. Series Equivalent Input and Output Impedance
MRF1517NT1 10 RF Device Data Freescale Semiconductor
Table 5. Common Source Scattering Parameters (VDD = 7.5 Vdc) IDQ = 150 mA
f MHz MH 50 100 200 300 400 500 600 700 800 900 1000 S11 |S11| 0.84 0.84 0.86 0.88 0.90 0.92 0.94 0.95 0.96 0.96 0.97 - 152 - 164 - 170 - 171 - 172 - 172 - 173 - 173 - 174 - 175 - 175 |S21| 17.66 8.86 4.17 2.54 1.72 1.28 0.98 0.76 0.61 0.50 0.40 S21 97 85 72 62 55 50 46 41 38 33 31 |S12| 0.016 0.016 0.015 0.014 0.013 0.013 0.014 0.010 0.011 0.011 0.006 S12 0 5 -5 -8 - 25 - 10 - 22 - 30 - 14 - 31 55 |S22| 0.77 0.78 0.79 0.80 0.83 0.84 0.86 0.86 0.86 0.85 0.88 S22 - 167 - 172 - 173 - 172 - 172 - 172 - 171 - 172 - 171 - 172 - 171
IDQ = 800 mA
f MHz MH 50 100 200 300 400 500 600 700 800 900 1000 S11 |S11| 0.90 0.89 0.90 0.90 0.91 0.92 0.93 0.94 0.94 0.95 0.96 - 165 - 172 - 175 - 176 - 176 - 176 - 176 - 176 - 176 - 177 - 177 |S21| 20.42 10.20 4.96 3.17 2.26 1.75 1.39 1.14 0.93 0.78 0.65 S21 94 87 79 73 67 63 59 55 51 45 43 |S12| 0.018 0.015 0.015 0.017 0.013 0.011 0.012 0.015 0.008 0.007 0.008 S12 1 -7 - 12 -2 1 -6 - 31 - 34 - 22 2 - 40 |S22| 0.76 0.77 0.77 0.80 0.82 0.83 0.85 0.88 0.87 0.87 0.90 S22 - 164 - 170 - 172 - 171 - 172 - 171 - 171 - 171 - 171 - 172 - 170
IDQ = 1.5 A
f MHz MH 50 100 200 300 400 500 600 700 800 900 1000 S11 |S11| 0.92 0.90 0.91 0.91 0.92 0.93 0.94 0.94 0.95 0.96 0.97 - 165 - 172 - 176 - 176 - 176 - 176 - 176 - 176 - 176 - 177 - 177 |S21| 19.90 9.93 4.84 3.10 2.22 1.73 1.39 1.12 0.93 0.78 0.64 S21 95 88 80 74 68 64 61 56 52 46 44 |S12| 0.017 0.018 0.016 0.014 0.014 0.016 0.013 0.013 0.009 0.008 0.012 S12 3 2 -4 - 11 - 14 -8 - 24 - 24 - 12 10 4 |S22| 0.76 0.77 0.77 0.80 0.81 0.83 0.85 0.87 0.87 0.87 0.89 S22 - 164 - 170 - 172 - 172 - 172 - 171 - 171 - 171 - 171 - 173 - 169
MRF1517NT1 RF Device Data Freescale Semiconductor 11
APPLICATIONS INFORMATION
DESIGN CONSIDERATIONS This device is a common - source, RF power, N - Channel enhancement mode, Lateral Metal - Oxide Semiconductor Field - Effect Transistor (MOSFET). Freescale Application Note AN211A, "FETs in Theory and Practice", is suggested reading for those not familiar with the construction and characteristics of FETs. This surface mount packaged device was designed primarily for VHF and UHF portable power amplifier applications. Manufacturability is improved by utilizing the tape and reel capability for fully automated pick and placement of parts. However, care should be taken in the design process to insure proper heat sinking of the device. The major advantages of Lateral RF power MOSFETs include high gain, simple bias systems, relative immunity from thermal runaway, and the ability to withstand severely mismatched loads without suffering damage. MOSFET CAPACITANCES The physical structure of a MOSFET results in capacitors between all three terminals. The metal oxide gate structure determines the capacitors from gate - to - drain (Cgd), and gate - to - source (Cgs). The PN junction formed during fabrication of the RF MOSFET results in a junction capacitance from drain - to - source (Cds). These capacitances are characterized as input (Ciss), output (Coss) and reverse transfer (Crss) capacitances on data sheets. The relationships between the inter - terminal capacitances and those given on data sheets are shown below. The Ciss can be specified in two ways: 1. Drain shorted to source and positive voltage at the gate. 2. Positive voltage of the drain in respect to source and zero volts at the gate. In the latter case, the numbers are lower. However, neither method represents the actual operating conditions in RF applications. drain - source voltage under these conditions is termed VDS(on). For MOSFETs, VDS(on) has a positive temperature coefficient at high temperatures because it contributes to the power dissipation within the device. BVDSS values for this device are higher than normally required for typical applications. Measurement of BVDSS is not recommended and may result in possible damage to the device. GATE CHARACTERISTICS The gate of the RF MOSFET is a polysilicon material, and is electrically isolated from the source by a layer of oxide. The DC input resistance is very high - on the order of 109 -- resulting in a leakage current of a few nanoamperes. Gate control is achieved by applying a positive voltage to the gate greater than the gate - to - source threshold voltage, VGS(th). Gate Voltage Rating -- Never exceed the gate voltage rating. Exceeding the rated VGS can result in permanent damage to the oxide layer in the gate region. Gate Termination -- The gates of these devices are essentially capacitors. Circuits that leave the gate open - circuited or floating should be avoided. These conditions can result in turn - on of the devices due to voltage build - up on the input capacitor due to leakage currents or pickup. Gate Protection -- These devices do not have an internal monolithic zener diode from gate - to - source. If gate protection is required, an external zener diode is recommended. Using a resistor to keep the gate - to - source impedance low also helps dampen transients and serves another important function. Voltage transients on the drain can be coupled to the gate through the parasitic gate - drain capacitance. If the gate - to - source impedance and the rate of voltage change on the drain are both high, then the signal coupled to the gate may be large enough to exceed the gate - threshold voltage and turn the device on. DC BIAS Since this device is an enhancement mode FET, drain current flows only when the gate is at a higher potential than the source. RF power FETs operate optimally with a quiescent drain current (IDQ), whose value is application dependent. This device was characterized at IDQ = 150 mA, which is the suggested value of bias current for typical applications. For special applications such as linear amplification, IDQ may have to be selected to optimize the critical parameters. The gate is a dc open circuit and draws no current. Therefore, the gate bias circuit may generally be just a simple resistive divider network. Some special applications may require a more elaborate bias system. GAIN CONTROL Power output of this device may be controlled to some degree with a low power dc control signal applied to the gate, thus facilitating applications such as manual gain control, ALC/AGC and modulation systems. This characteristic is very dependent on frequency and load line.
Drain Cgd Gate Cds Cgs Source Ciss = Cgd + Cgs Coss = Cgd + Cds Crss = Cgd
DRAIN CHARACTERISTICS One critical figure of merit for a FET is its static resistance in the full - on condition. This on - resistance, RDS(on), occurs in the linear region of the output characteristic and is specified at a specific gate - source voltage and drain current. The
MRF1517NT1 12 RF Device Data Freescale Semiconductor
MOUNTING The specified maximum thermal resistance of 2C/W assumes a majority of the 0.065 x 0.180 source contact on the back side of the package is in good contact with an appropriate heat sink. As with all RF power devices, the goal of the thermal design should be to minimize the temperature at the back side of the package. Refer to Freescale Application Note AN4005/D, "Thermal Management and Mounting Method for the PLD - 1.5 RF Power Surface Mount Package," and Engineering Bulletin EB209/D, "Mounting Method for RF Power Leadless Surface Mount Transistor" for additional information. AMPLIFIER DESIGN Impedance matching networks similar to those used with bipolar transistors are suitable for this device. For examples see Freescale Application Note AN721, "Impedance Matching Networks Applied to RF Power Transistors."
Large - signal impedances are provided, and will yield a good first pass approximation. Since RF power MOSFETs are triode devices, they are not unilateral. This coupled with the very high gain of this device yields a device capable of self oscillation. Stability may be achieved by techniques such as drain loading, input shunt resistive loading, or output to input feedback. The RF test fixture implements a parallel resistor and capacitor in series with the gate, and has a load line selected for a higher efficiency, lower gain, and more stable operating region. Two - port stability analysis with this device's S - parameters provides a useful tool for selection of loading or feedback circuitry to assure stable operation. See Freescale Application Note AN215A, "RF Small - Signal Design Using Two - Port Parameters" for a discussion of two port network theory and stability.
MRF1517NT1 RF Device Data Freescale Semiconductor 13
PACKAGE DIMENSIONS
A F
3
0.146 3.71
0.095 2.41
0.115 2.92
B
D
1
2
R
L
0.115 2.92 0.020 0.51
4
N K Q
ZONE V
0.35 (0.89) X 45_" 5 _ 10_DRAFT
inches mm
SOLDER FOOTPRINT
DIM A B C D E F G H J K L N P Q R S U ZONE V ZONE W ZONE X INCHES MIN MAX 0.255 0.265 0.225 0.235 0.065 0.072 0.130 0.150 0.021 0.026 0.026 0.044 0.050 0.070 0.045 0.063 0.160 0.180 0.273 0.285 0.245 0.255 0.230 0.240 0.000 0.008 0.055 0.063 0.200 0.210 0.006 0.012 0.006 0.012 0.000 0.021 0.000 0.010 0.000 0.010 MILLIMETERS MIN MAX 6.48 6.73 5.72 5.97 1.65 1.83 3.30 3.81 0.53 0.66 0.66 1.12 1.27 1.78 1.14 1.60 4.06 4.57 6.93 7.24 6.22 6.48 5.84 6.10 0.00 0.20 1.40 1.60 5.08 5.33 0.15 0.31 0.15 0.31 0.00 0.53 0.00 0.25 0.00 0.25
U H
4
P C
Y
Y
E
ZONE W
1
G
MRF1517NT1 14 RF Device Data Freescale Semiconductor
EEEEEE EE EEEE E EEEEEE EE EEEEEE EEEE E EEEEEE EE
2 3
NOTES: 1. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1984. 2. CONTROLLING DIMENSION: INCH 3. RESIN BLEED/FLASH ALLOWABLE IN ZONE V, W, AND X. STYLE 1: PIN 1. 2. 3. 4. DRAIN GATE SOURCE SOURCE
S
ZONE X
VIEW Y - Y
CASE 466 - 03 ISSUE D PLD- 1.5 PLASTIC
How to Reach Us:
Home Page: www.freescale.com E - mail: support@freescale.com USA/Europe or Locations Not Listed: Freescale Semiconductor Technical Information Center, CH370 1300 N. Alma School Road Chandler, Arizona 85224 +1 - 800 - 521 - 6274 or +1 - 480 - 768 - 2130 support@freescale.com Europe, Middle East, and Africa: Freescale Halbleiter Deutschland GmbH Technical Information Center Schatzbogen 7 81829 Muenchen, Germany +44 1296 380 456 (English) +46 8 52200080 (English) +49 89 92103 559 (German) +33 1 69 35 48 48 (French) support@freescale.com Japan: Freescale Semiconductor Japan Ltd. Headquarters ARCO Tower 15F 1 - 8 - 1, Shimo - Meguro, Meguro - ku, Tokyo 153 - 0064 Japan 0120 191014 or +81 3 5437 9125 support.japan@freescale.com Asia/Pacific: Freescale Semiconductor Hong Kong Ltd. Technical Information Center 2 Dai King Street Tai Po Industrial Estate Tai Po, N.T., Hong Kong +800 2666 8080 support.asia@freescale.com For Literature Requests Only: Freescale Semiconductor Literature Distribution Center P.O. Box 5405 Denver, Colorado 80217 1 - 800 - 441 - 2447 or 303 - 675 - 2140 Fax: 303 - 675 - 2150 LDCForFreescaleSemiconductor@hibbertgroup.com
Information in this document is provided solely to enable system and software implementers to use Freescale Semiconductor products. There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits or integrated circuits based on the information in this document. Freescale Semiconductor reserves the right to make changes without further notice to any products herein. Freescale Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Freescale Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters that may be provided in Freescale Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals", must be validated for each customer application by customer's technical experts. Freescale Semiconductor does not convey any license under its patent rights nor the rights of others. Freescale Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer purchase or use Freescale Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold Freescale Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Freescale Semiconductor was negligent regarding the design or manufacture of the part. Freescalet and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. (c) Freescale Semiconductor, Inc. 2006. All rights reserved.
RoHS-compliant and/or Pb-free versions of Freescale products have the functionality and electrical characteristics of their non-RoHS-compliant and/or non-Pb-free counterparts. For further information, see http://www.freescale.com or contact your Freescale sales representative. For information on Freescale's Environmental Products program, go to http://www.freescale.com/epp.
MRF1517NT1
Document Number: RF Device Data MRF1517N Rev. 5, 9/2006 Freescale Semiconductor
15

▲Up To Search▲

Price & Availability of MRF1517NT1

	To Download MRF1517NT1 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .