1
MRF557MOTOROLA RF DEVICE DATA
The RF Line
Designed primarily for wideband large signal predriver stages in the
800 MHz frequency range.
•Specified @ 12.5 V, 870 MHz Characteristics
Output Power = 1.5 W
Minimum Gain = 8.0 dB
Efficiency 60% (Typ)
•Cost Effective PowerMacro Package
•Electroless Tin Plated Leads for Improved Solderability
•Circuit board photomaster available upon request by
contacting RF Tactical Marketing in Phoenix, AZ.
MAXIMUM RATINGS
Rating Symbol Value Unit
Collector–Emitter Voltage VCEO 16 Vdc
Collector–Base Voltage VCBO 36 Vdc
Emitter–Base Voltage VEBO 4.0 Vdc
Collector Current — Continuous IC400 mAdc
Total Device Dissipation @ TC = 75°C (1, 2)
Derate above 75°CPD3.0
40 Watts
mW/°C
Storage Temperature Range Tstg –55 to +150 °C
THERMAL CHARACTERISTICS
Characteristic Symbol Max Unit
Thermal Resistance, Junction to Case RθJC 25 °C/W
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Characteristic Symbol Min Typ Max Unit
OFF CHARACTERISTICS
Collector–Emitter Breakdown Voltage
(IC = 5.0 mAdc, IB = 0) V(BR)CEO 16 — — Vdc
Collector–Emitter Breakdown Voltage
(IC = 5.0 mAdc, VBE = 0) V(BR)CES 36 — — Vdc
Emitter–Base Breakdown Voltage
(IE = 0.1 mAdc, IC = 0) V(BR)EBO 4.0 — — Vdc
Collector Cutoff Current
(VCE = 15 Vdc, VBE = 0, TC = 25°C) ICES — — 0.1 mAdc
ON CHARACTERISTICS
DC Current Gain
(IC = 100 mAdc, VCE = 5.0 Vdc) hFE 50 90 200 —
DYNAMIC CHARACTERISTICS
Output Capacitance
(VCB = 15 Vdc, IE = 0, f = 1.0 MHz) Cob — 3.5 5.0 pF
NOTES: (continued)
1. TC, Case temperature measured on collector lead immediately adjacent to body of package.
2. The MRF557 PowerMacro must be properly mounted for reliable operation. AN938, “Mounting Techniques in PowerMacro Transistor,”
discusses methods of mounting and heatsinking.
Order this document
by MRF557/D
SEMICONDUCTOR TECHNICAL DATA
1.5 W, 870 MHz
RF LOW POWER
TRANSISTOR
NPN SILICON
CASE 317D–02, STYLE 2
Motorola, Inc. 1995
REV 7
MRF557
2MOTOROLA RF DEVICE DATA
ELECTRICAL CHARACTERISTICS — continued (TA = 25°C unless otherwise noted)
Characteristic Symbol Min Typ Max Unit
FUNCTIONAL TESTS
Common–Emitter Amplifier Power Gain Figures 1, 2
(VCC = 12.5 Vdc, Pout = 1.5 W, f = 870 MHz) Gpe 8.0 9.0 — dB
Collector Efficiency Figures 1, 2
(VCC = 12.5 Vdc, Pout = 1.5 W, f = 870 MHz) ηc55 60 — %
Load Mismatch Stress Figures 1, 2
(VCC = 15.5 Vdc, Pin = 225 mW, f = 870 MHz,
VSWR ≥ 10:1 all phase angles)
ψNo Degradation in Output Power
Figure 1. 800–880 MHz Broadband Circuit
C1, C2, C5, C7 — 0.8–8.0 pF Johanson Gigatrim*
C3, C4 — 15 pF Clamped Mica, Mini–Underwood
C6 — 27 pF Clamped Mica, Mini–Underwood
C8 — 91 pF Clamped Mica, Mini–Underwood
C9 — 68 pF Clamped Mica, Mini–Underwood
C10 — 1.0 µF, 25 V Tantalum
B — Bead, Ferroxcube 56–590–65/3B
PCB — 1/16″ Glass Teflon, εr = 2.56
*Fixed tuned for broadband response.
L1, L4 — 5 Turns #21 AWG, 5/32″ ID
L2, L3 — 60 x 125 x 250 Mils Copper Tab on
L2, L3 — 27 Mil Thick Alumina Substrate
L5 — 7 Turns #21 AWG, 5/32″ ID
Z1 — 1.65 x 0.163″ Microstrip, Zo = 50 Ω
Z2 — 0.85 x 0.163″ Microstrip, Zo = 50 Ω
Z3 — 0.625 x 0.163″ Microstrip, Zo = 50 Ω
Z4 — 1.35 x 0.163″ Microstrip, Zo = 50 Ω
BB
RF
POWER
INPUT
RF
POWER
OUTPUT
D.U.T.
Z1
+
Z2
Z3 Z4
C10
+
–
C9
L5
C8
L4
L3
L2
L1
C1 C2
C3 C4 C5 C7
C6
VCC
3
MRF557MOTOROLA RF DEVICE DATA
Figure 2. Performance in Broadband Circuit
Gpe
η
c
IRL
Gpe, POWER GAIN (dB)
c
η
, COLLECTOR EFFICIENCY (%)
16
14
12
10
8
6
4
2
900
80
70
60
50
40
30
20
10
0
f, FREQUENCY (MHz)
10
15
20
5
IRL, INPUT RETURN LOSS (dB)
880860840820800
0
f
Frequency
MHz
Zin
Ohms ZOL*
Ohms
f
Frequency
MHz
VCC = 7.5 V VCC = 12.5 V VCC = 7.5 V VCC = 12.5 V
f
Frequency
MHz
Pin = 300 mW Pin = 200 mW
Pout 806 MHz = 1.7 W
Pout 870 MHz = 1.4 W
Pout 960 MHz = 1.0 W
Pout 806 MHz = 2.1 W
Pout 870 MHz = 1.8 W
Pout 960 MHz = 1.1 W
806 2.4 + j3.9 2.4 + j3.1 14.7 – j4.4 13.6 – j12.8
870 2.5 + j4.6 2.7 + j3.7 17.2 – j8.6 16 – j13.2
960 6.1 + j7.4 6.8 + j8.3 40 – j8.3 38 – j10.5
ZOL* = Conjugate of the optimum load impedance into which the device output operates at a given output power, voltage and frequency.
Table 1. Zin and ZOL versus Collector Voltage, Input Power and Output Power
MRF557
4MOTOROLA RF DEVICE DATA
800
Figure 3. Power Output versus Power Input Figure 4. Power Output versus Frequency
Figure 5. Power Output versus Frequency Figure 6. Power Output versus Supply Voltage
Figure 7. Power Output versus Supply Voltage Figure 8. Power Output versus Supply Voltage
P , POWER OUTPUT (WATTS)
out
2.5
2
1.5
1
0.5
1000 Pin, POWER INPUT (mW)
VCC = 12.5 Vdc
P , POWER OUTPUT (WATTS)
out
2.5
2
1.5
1
0.5
800 f, FREQUENCY (MHz)
P , POWER OUTPUT (WATTS)
out
0 0
f, FREQUENCY (MHz) 86 VCC, SUPPLY VOLTAGE (VOLTS)
10 12 14 16
P , POWER OUTPUT (WATTS)
out
4
3
2
1
0
86 VCC, SUPPLY VOLTAGE (VOLTS)
10 12 14 16
P , POWER OUTPUT (WATTS)
out
4
3
2
1
0
f = 870 MHz
86 VCC, SUPPLY VOLTAGE (VOLTS)
10 12 14 16
P , POWER OUTPUT (WATTS)
out
4
3
2
1
0
200 300 400
7.5 Vdc
f = 870 MHz
820 840 860 880 900 920 940 960
Pin = 300 mW
200 mW
100 mW
VCC = 7.5 Vdc
2.5
2
1.5
1
0.5
0820 840 860 880 900 920 940 960
200 mW
100 mW
Pin = 300 mW
VCC = 12.5 Vdc
f = 806 MHz
200 mW
100 mW
Pin = 300 mW
200 mW
100 mW
Pin = 300 mW f = 960 MHz
200 mW
100 mW
Pin = 300 mW
5
MRF557MOTOROLA RF DEVICE DATA
PACKAGE DIMENSIONS
CASE 317D–02
ISSUE C
STYLE 2:
PIN 1. COLLECTOR
2. EMITTER
3. BASE
4. EMITTER
N
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. LEAD DIMENSIONS UNCONTROLLED WITHIN
DIMENSION N AND R.
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.175 0.205 4.45 5.20
C0.075 0.100 1.91 2.54
D0.033 0.039 0.84 0.99
F0.097 0.104 2.46 2.64
H0.348 0.383 8.84 9.72
J0.008 0.012 0.24 0.30
K0.285 0.320 7.24 8.12
N––– 0.065 ––– 1.65
R––– 0.128 ––– 3.25
T0.025 0.040 0.64 1.01
F
DK
H
R
A
124 3
T
SEATING
PLANE
J
C
MRF557
6MOTOROLA RF DEVICE DATA
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola 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 can and do vary in different
applications. All operating parameters, including “T ypicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola 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 Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola 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 Motorola was negligent regarding the design or manufacture of the part.
Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer .
How to reach us:
USA/ EUROPE: Motorola Literature Distribution; JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315
MFAX: RMFAX0@email.sps.mot.com – T OUCHTONE (602) 244–6609 HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
INTERNET: http://Design–NET.com 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
MRF557/D
*MRF557/D*
◊
