SCHOTTKY RECTIFIER 9 Amp
90SQ... SERIES
PD-2.222 rev. B 12/97
1www.irf.com
Dimensions in millimeters and inches
Conforms to JEDEC Outline DO - 204AR
CASE STYLE AND DIMENSIONS
Major Ratings and Characteristics
IF(AV) Rectangular 9 A
waveform
VRRM range 35 to 45 V
IFSM @ tp = 5 µs sine 2150 A
VF@ 9 Apk, TJ
= 125°C 0.42 V
TJrange - 55 to 150 °C
Characteristics 90SQ... Units
Description/Features
The 90SQ axial leaded Schottky rectifier series has been
optimized for very low forward voltage drop, with moderate
leakage. The proprietary barrier technology allows for reliable
operation up to 150°C junction temperature. Typical applica-
tions are in switching power supplies, converters, free-
wheeling diodes, and reverse battery protection.
150° C TJ operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
90SQ... Series
PD-2.222 rev. B 12/97
2www.irf.com
VFM Max. Forward Voltage Drop (1) 0.48 V @ 9A
* See Fig. 1 0.57 V @ 18A
0.42 V @ 9A
0.52 V @ 18A
IRM Max. Reverse Leakage Current (1) 1.75 mA TJ = 25 °C
* See Fig. 2 7 0 mA TJ = 125 °C
CTMax. Junction Capacitance 900 p F VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 °C
LSTypical Series Inductance 10.0 nH Measured lead to lead 5mm from body
dv/dt Max. Voltage Rate of Change 10,000 V/ µ s
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
Parameters 90SQ Units Conditions
Electrical Specifications
TJMax. Junction Temperature Range -55 to 150 °C
Tstg Max. Storage Temperature Range -55 to 150 °C
RthJL Max. Thermal Resistance Junction 8.0 °C/W DC operation * See Fig. 4
to Lead 1/8 inch lead leangth
RthJA Typical Thermal Resistance, 44 °C/W
Junction to Air
wt Approximate Weight 1.4(0.049) g (oz.)
Case Style DO - 204AR JEDEC
Thermal-Mechanical Specifications
Parameters 90SQ Units Conditions
(1) Pulse Width < 300µs, Duty Cycle < 2%
IF(AV) Max. Average Forward Current 9 A 50% duty cycle @ TC = 69° C, rectangular wave form
* See Fig. 5
IFSM Max. Peak One Cycle Non-Repetitive 2150 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 7 340 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 12 mJ TJ = 25 °C, IAS = 1.8 Amps, L = 7.4 mH
IAR Repetitive Avalanche Current 1.8 A Current decaying linearly to zero in 1 µsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Parameters 90SQ Units Conditions
Absolute Maximum Ratings
AFollowing any rated
load condition and
with rated VRRM applied
Part number 90SQ035 90SQ040 90SQ045
VRMax. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V) 35 40 45
Voltage Ratings
90SQ... Series
PD-2.222 rev. B 12/97
3
www.irf.com
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance ZthJL
Characteristics
.001
.01
.1
1
10
100
1000
0 5 10 15 20 25 30 35 40 4
5
R
R
125°C
100°C
75°C
50°C
25°C
Reverse Voltage - V (V)
Re v e r s e Curre nt - I (mA )
T = 150° C
J
100
1000
0102030405
0
T = 25°C
J
R everse V oltage - V (V)
R
T
Junction C apa citance - C (pF )
Fig. 1 - Maximum Forward Voltage Drop Characteristics
.1
1
10
100
0.1.2.3.4.5.6.7.8.911.11.
2
FM
F
Instantaneous F orward Current - I (A)
Forw ard V oltage D rop - V (V )
T = 150°C
T = 125°C
T = 25°C
J
J
J
.01
.1
1
10
.00001 .0001 .001 .01 .1 1 10 10
0
D = 0.33
D = 0.50
D = 0.25
D = 0.17
D = 0.08
1
t , R e ctangu lar P ulse D uration (S econ ds)
Sin gle Puls e
(Thermal R esistance)
Thermal Impedance - Z (°C/W)
thJL
2
t
1
t
P
DM
Notes:
1. Duty fa ctor D = t / t
2 . P e ak T = P x Z + T
1
JDM C
2
thJL
= 1/8 inch
90SQ... Series
PD-2.222 rev. B 12/97
4www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
0
1
2
3
4
5
6
0246810121
4
DC
Average Power Loss - (Watts)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Average Forward Current - I (A)
95
105
115
125
135
145
155
02468101214
DC
Allowab le Case Temperature - (°C)
Av e ra ge Fo rward Curren t - I (A)
F(AV)
90SQ
R ( DC) = 8.0°C/W
thJL
= 1/8 inch
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
100
1000
10000
10 100 1000 10000
FSM
p
N on-Repet iti ve Surge Current - I (A)
A t Any Rat ed Load Conditi on
And With Rated V Applied
Follo w ing Su rge
RRM
Square Wave Pulse Duration - t (microsec)
