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PD - 95581
Applications l High Frequency Synchronous Buck Converters for Computer Processor Power l Lead-Free
HEXFET(R) Power MOSFET
IRL3715ZPbF IRL3715ZSPbF IRL3715ZLPBF
Qg
7.0nC
VDSS RDS(on) max
20V 11m:
Benefits l Low RDS(on) at 4.5V VGS l Ultra-Low Gate Impedance l Fully Characterized Avalanche Voltage and Current
TO-220AB IRL3715Z
D2Pak IRL3715ZS
TO-262 IRL3715ZL
Absolute Maximum Ratings
Parameter
VDS VGS ID @ TC = 25C ID @ TC = 100C IDM PD @TC = 25C PD @TC = 100C TJ TSTG Drain-to-Source Voltage Gate-to-Source Voltage Continuous Drain Current, VGS @ 10V Continuous Drain Current, VGS @ 10V Pulsed Drain Current
Max.
20 20 50 36 200 45 23 0.30 -55 to + 175
Units
V A
h h
Maximum Power Dissipation Maximum Power Dissipation Linear Derating Factor Operating Junction and Storage Temperature Range Soldering Temperature, for 10 seconds Mounting Torque, 6-32 or M3 screw
W
W/C C
f
300 (1.6mm from case) 10 lbfyin (1.1Nym)
Thermal Resistance
Parameter
RJC RCS RJA RJA Junction-to-Case Case-to-Sink, Flat Greased Surface Junction-to-Ambient
Typ.
Max.
3.33 --- 62 40
Units
C/W
fA
f
--- 0.50 --- ---
Junction-to-Ambient (PCB Mount)
g
Notes through are on page 12
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1
07/20/04
IRL3715Z/S/LPbF
Static @ TJ = 25C (unless otherwise specified)
Parameter
BVDSS VDSS/TJ RDS(on) VGS(th) VGS(th)/TJ IDSS IGSS gfs Qg Qgs1 Qgs2 Qgd Qgodr Qsw Qoss td(on) tr td(off) tf Ciss Coss Crss Drain-to-Source Breakdown Voltage Breakdown Voltage Temp. Coefficient Static Drain-to-Source On-Resistance Gate Threshold Voltage Gate Threshold Voltage Coefficient Drain-to-Source Leakage Current Gate-to-Source Forward Leakage Gate-to-Source Reverse Leakage Forward Transconductance Total Gate Charge Pre-Vth Gate-to-Source Charge Post-Vth Gate-to-Source Charge Gate-to-Drain Charge Gate Charge Overdrive Switch Charge (Qgs2 + Qgd) Output Charge Turn-On Delay Time Rise Time Turn-Off Delay Time Fall Time Input Capacitance Output Capacitance Reverse Transfer Capacitance
Min. Typ. Max. Units
20 --- --- --- 1.65 --- --- --- --- --- 31 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 0.014 9.2 12.4 2.1 -5.2 --- --- --- --- --- 7.0 2.1 0.9 2.3 1.7 3.2 3.7 7.1 44 11 4.6 870 270 140 --- --- 11 15.5 2.55 --- 1.0 150 100 -100 --- 11 --- --- --- --- --- --- --- --- --- --- --- --- --- pF VGS = 0V VDS = 10V ns nC nC VDS = 10V VGS = 4.5V ID = 12A S nA V mV/C A V
Conditions
VGS = 0V, ID = 250A
V/C Reference to 25C, ID = 1mA m VGS = 10V, ID = 15A VGS = 4.5V, ID = 12A
e e
VDS = VGS, ID = 250A VDS = 16V, VGS = 0V VDS = 16V, VGS = 0V, TJ = 125C VGS = 20V VGS = -20V VDS = 10V, ID = 12A
See Fig. 16 VDS = 10V, VGS = 0V VDD = 10V, VGS = 4.5V ID = 12A Clamped Inductive Load
e
= 1.0MHz
Avalanche Characteristics
EAS IAR EAR Parameter Single Pulse Avalanche Energyd Avalanche CurrentA Repetitive Avalanche Energy Typ. --- --- --- Max. 44 12 4.5 Units mJ A mJ
--- --- --- --- --- --- --- --- 9.1 2.2
Diode Characteristics
Parameter
IS ISM VSD trr Qrr Continuous Source Current (Body Diode) Pulsed Source Current (Body Diode)A Diode Forward Voltage Reverse Recovery Time Reverse Recovery Charge
Min. Typ. Max. Units
50
h
Conditions
MOSFET symbol
D
A 200 1.0 14 3.3 V ns nC
showing the integral reverse
G S
p-n junction diode. TJ = 25C, IS = 12A, VGS = 0V TJ = 25C, IF = 12A, VDD = 10V di/dt = 100A/s
e
e
2
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IRL3715Z/S/LPbF
1000
VGS 10V 9.0V 7.0V 5.0V 4.5V 4.0V 3.5V BOTTOM 3.0V TOP
1000
ID, Drain-to-Source Current (A)
100
ID, Drain-to-Source Current (A)
100
VGS 10V 9.0V 7.0V 5.0V 4.5V 4.0V 3.5V BOTTOM 3.0V TOP
10
10
3.0V
3.0V 60s PULSE WIDTH Tj = 25C
1 0.1 1 10
60s PULSE WIDTH Tj = 175C
1 0.1 1 10
VDS, Drain-to-Source Voltage (V)
VDS, Drain-to-Source Voltage (V)
Fig 1. Typical Output Characteristics
Fig 2. Typical Output Characteristics
1000
2.0
RDS(on) , Drain-to-Source On Resistance (Normalized)
ID, Drain-to-Source Current ()
ID = 30A VGS = 10V
T J = 25C
100
1.5
T J = 175C
1.0
VDS = 10V 60s PULSE WIDTH
10 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
0.5 -60 -40 -20 0 20 40 60 80 100 120 140 160 180
VGS, Gate-to-Source Voltage (V)
T J , Junction Temperature (C)
Fig 3. Typical Transfer Characteristics
Fig 4. Normalized On-Resistance vs. Temperature
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IRL3715Z/S/LPbF
10000
12
VGS, Gate-to-Source Voltage (V)
VGS = 0V, f = 1 MHZ C iss = C gs + C gd, C ds SHORTED C rss = C gd C oss = C ds + C gd
ID= 12A 10 8 6 4 2 0
VDS= 20V VDS= 10V
C, Capacitance (pF)
1000
Ciss
Coss Crss
100 1 10 100
0
4
8
12
16
VDS, Drain-to-Source Voltage (V)
QG Total Gate Charge (nC)
Fig 5. Typical Capacitance vs. Drain-to-Source Voltage
Fig 6. Typical Gate Charge vs. Gate-to-Source Voltage
1000.0
1000 OPERATION IN THIS AREA LIMITED BY R DS(on)
100.0 T J = 175C 10.0
ID, Drain-to-Source Current (A)
ISD, Reverse Drain Current (A)
100
100sec 10 1msec 10msec 1 10 100
1.0
T J = 25C VGS = 0V
0.1 0.0 0.5 1.0 1.5 2.0 VSD, Source-toDrain Voltage (V)
1
Tc = 25C Tj = 175C Single Pulse 0
VDS , Drain-toSource Voltage (V)
Fig 7. Typical Source-Drain Diode Forward Voltage
Fig 8. Maximum Safe Operating Area
4
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IRL3715Z/S/LPbF
60 LIMITED BY PACKAGE 50
ID , Drain Current (A)
2.6
VGS(th) Gate threshold Voltage (V)
2.2
40 30 20 10 0 25 50 75 100 125 150 175
1.8
ID = 250A
1.4
1.0 -75 -50 -25 0 25 50 75 100 125 150 175 200
T C , Case Temperature (C)
T J , Temperature ( C )
Fig 9. Maximum Drain Current vs. Case Temperature
Fig 10. Threshold Voltage vs. Temperature
10
Thermal Response ( Z thJC )
D = 0.50
1
0.20 0.10 0.05
0.1
R1 R1 J 1 2 R2 R2 R3 R3 3 C 3
0.02 0.01 SINGLE PULSE ( THERMAL RESPONSE )
J
Ri (C/W) i (sec) 0.942 0.000145 0.982 0.406 0.000805 0.004757
1
2
0.01
Ci= i/Ri Ci= i/Ri
Notes: 1. Duty Factor D = t1/t2 2. Peak Tj = P dm x Zthjc + Tc
0.0001 0.001 0.01
0.001 1E-006 1E-005
t1 , Rectangular Pulse Duration (sec)
Fig 11. Maximum Effective Transient Thermal Impedance, Junction-to-Case
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IRL3715Z/S/LPbF
15V
200
EAS, Single Pulse Avalanche Energy (mJ)
VDS
L
DRIVER
160
ID 3.9A 5.4A BOTTOM 12A
TOP
RG
20V VGS
D.U.T
IAS tp
+ V - DD
120
A
0.01
80
Fig 12a. Unclamped Inductive Test Circuit
V(BR)DSS tp
40
0 25 50 75 100 125 150 175
Starting T J, Junction Temperature (C)
Fig 12c. Maximum Avalanche Energy vs. Drain Current
I AS
LD VDS
Fig 12b. Unclamped Inductive Waveforms
+
VDD D.U.T VGS Pulse Width < 1s Duty Factor < 0.1%
50K 12V .2F .3F
Current Regulator Same Type as D.U.T.
Fig 14a. Switching Time Test Circuit
D.U.T. + V - DS
VDS
90%
VGS
3mA
10%
IG ID
Current Sampling Resistors
VGS
td(on) tr td(off) tf
Fig 13. Gate Charge Test Circuit
Fig 14b. Switching Time Waveforms
6
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IRL3715Z/S/LPbF
D.U.T
Driver Gate Drive
+
P.W.
Period
D=
P.W. Period VGS=10V
+
Circuit Layout Considerations * Low Stray Inductance * Ground Plane * Low Leakage Inductance Current Transformer
*
D.U.T. ISD Waveform Reverse Recovery Current Body Diode Forward Current di/dt D.U.T. VDS Waveform Diode Recovery dv/dt
-
+
RG
* * * * dv/dt controlled by RG Driver same type as D.U.T. I SD controlled by Duty Factor "D" D.U.T. - Device Under Test
V DD
VDD
+ -
Re-Applied Voltage Inductor Curent
Body Diode
Forward Drop
Ripple 5%
ISD
* VGS = 5V for Logic Level Devices Fig 15. Peak Diode Recovery dv/dt Test Circuit for N-Channel HEXFET(R) Power MOSFETs
Id Vds Vgs
Vgs(th)
Qgs1 Qgs2
Qgd
Qgodr
Fig 16. Gate Charge Waveform
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IRL3715Z/S/LPbF
Power MOSFET Selection for Non-Isolated DC/DC Converters
Control FET Special attention has been given to the power losses in the switching elements of the circuit - Q1 and Q2. Power losses in the high side switch Q1, also called the Control FET, are impacted by the Rds(on) of the MOSFET, but these conduction losses are only about one half of the total losses. Power losses in the control switch Q1 are given by; Synchronous FET The power loss equation for Q2 is approximated by;
* Ploss = Pconduction + P + Poutput drive
Ploss = Irms x Rds(on)
+ ( g x Vg x f ) Q
(
2
)
Ploss = Pconduction+ Pswitching+ Pdrive+ Poutput
This can be expanded and approximated by;
Q + oss x Vin x f + (Qrr x Vin x f ) 2
*dissipated primarily in Q1.
Ploss = (Irms 2 x Rds(on ) ) Qgd +I x x Vin x ig + (Qg x Vg x f ) + Qoss x Vin x f 2 Qgs 2 f + I x x Vin x f ig
This simplified loss equation includes the terms Qgs2 and Qoss which are new to Power MOSFET data sheets. Qgs2 is a sub element of traditional gate-source charge that is included in all MOSFET data sheets. The importance of splitting this gate-source charge into two sub elements, Qgs1 and Qgs2, can be seen from Fig 16. Qgs2 indicates the charge that must be supplied by the gate driver between the time that the threshold voltage has been reached and the time the drain current rises to Idmax at which time the drain voltage begins to change. Minimizing Q gs2 is a critical factor in reducing switching losses in Q1. Qoss is the charge that must be supplied to the output capacitance of the MOSFET during every switching cycle. Figure A shows how Qoss is formed by the parallel combination of the voltage dependant (nonlinear) capacitances Cds and Cdg when multiplied by the power supply input buss voltage.
For the synchronous MOSFET Q2, Rds(on) is an important characteristic; however, once again the importance of gate charge must not be overlooked since it impacts three critical areas. Under light load the MOSFET must still be turned on and off by the control IC so the gate drive losses become much more significant. Secondly, the output charge Qoss and reverse recovery charge Qrr both generate losses that are transfered to Q1 and increase the dissipation in that device. Thirdly, gate charge will impact the MOSFETs' susceptibility to Cdv/dt turn on. The drain of Q2 is connected to the switching node of the converter and therefore sees transitions between ground and Vin. As Q1 turns on and off there is a rate of change of drain voltage dV/dt which is capacitively coupled to the gate of Q2 and can induce a voltage spike on the gate that is sufficient to turn the MOSFET on, resulting in shoot-through current . The ratio of Qgd/Qgs1 must be minimized to reduce the potential for Cdv/dt turn on.
Figure A: Qoss Characteristic
8
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IRL3715Z/S/LPbF
TO-220AB Package Outline
Dimensions are shown in millimeters (inches)
2.87 (.113) 2.62 (.103)
10.54 (.415) 10.29 (.405)
3.78 (.149) 3.54 (.139) -A6.47 (.255) 6.10 (.240)
-B4.69 (.185) 4.20 (.165) 1.32 (.052) 1.22 (.048)
4 15.24 (.600) 14.84 (.584)
LEAD ASSIGNMENTS
1.15 (.045) MIN 1 2 3 LEAD ASSIGNMENTS IGBTs, CoPACK 1 - GATE 21- GATE DRAIN 1- GATE 32- DRAINSOURCE 2- COLLECTOR 3- SOURCE 3- EMITTER 4 - DRAIN
HEXFET
14.09 (.555) 13.47 (.530)
4- DRAIN
4.06 (.160) 3.55 (.140)
4- COLLECTOR
3X 1.40 (.055) 3X 1.15 (.045) 2.54 (.100) 2X NOTES:
0.93 (.037) 0.69 (.027) M BAM
3X
0.55 (.022) 0.46 (.018)
0.36 (.014)
2.92 (.115) 2.64 (.104)
1 DIMENSIONING & TOLERANCING PER ANSI Y14.5M, 1982. 2 CONTROLLING DIMENSION : INCH
3 OUTLINE CONFORMS TO JEDEC OUTLINE TO-220AB. 4 HEATSINK & LEAD MEASUREMENTS DO NOT INCLUDE BURRS.
TO-220AB Part Marking Information
E XAMPL E : T HIS IS AN IRF 1010 L OT CODE 1789 AS S E MB L E D ON WW 19, 1997 IN T H E AS S E MB L Y L INE "C" INT E R NAT IONAL RE CT IF IE R L OGO AS S E MB L Y L OT CODE PART NU MB E R
Note: "P" in assembly line position indicates "Lead-Free"
DAT E CODE YE AR 7 = 1997 WE E K 19 L INE C
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IRL3715Z/S/LPbF
D2Pak Package Outline
Dimensions are shown in millimeters (inches)
D2Pak Part Marking Information
T HIS IS AN IR F 530S WIT H L OT CODE 8024 AS S EMB L ED ON WW 02, 2000 IN T HE AS S E MBL Y L INE "L " Note: "P" in as s embly line pos ition indicates "L ead-F ree" INT E R NAT IONAL R E CT IFIER L OGO AS S E MB L Y L OT CODE PAR T NU MB ER F 530S DAT E CODE YE AR 0 = 2000 WEE K 02 L INE L
OR
INT E R NAT IONAL RE CT IF IE R L OGO PART NU MB E R F 530S DAT E CODE P = DE S IGNAT E S LE AD-F RE E PR ODUCT (OPT IONAL ) YE AR 0 = 2000 WE E K 02 A = AS S E MB LY S IT E CODE AS S E MB LY LOT CODE
10
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IRL3715Z/S/LPbF
TO-262 Package Outline
Dimensions are shown in millimeters (inches)
TO-262 Part Marking Information
E XAMPLE : T HIS IS AN IRL3103L LOT CODE 1789 AS S EMB LE D ON WW 19, 1997 IN THE AS S EMB LY LINE "C" Note: "P" in as sembly line pos ition indicates "Lead-Free" INT E RNATIONAL RE CT IF IER LOGO AS S EMBLY LOT CODE PART NUMB ER
DATE CODE YE AR 7 = 1997 WE E K 19 LINE C
OR
INT ERNAT IONAL RECT IFIE R LOGO AS S E MB LY LOT CODE PART NUMBE R DAT E CODE P = DE S IGNAT E S LEAD-FREE PRODUCT (OPT IONAL) YE AR 7 = 1997 WE EK 19 A = AS S EMB LY S IT E CODE
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IRL3715Z/S/LPbF
TRR
D2Pak Tape & Reel Information
Dimensions are shown in millimeters (inches)
1.60 (.063) 1.50 (.059) 4.10 (.161) 3.90 (.153)
1.60 (.063) 1.50 (.059) 0.368 (.0145) 0.342 (.0135)
FEED DIRECTION 1.85 (.073)
1.65 (.065)
11.60 (.457) 11.40 (.449)
15.42 (.609) 15.22 (.601)
24.30 (.957) 23.90 (.941)
TRL
10.90 (.429) 10.70 (.421) 1.75 (.069) 1.25 (.049) 16.10 (.634) 15.90 (.626) 4.72 (.136) 4.52 (.178)
FEED DIRECTION
13.50 (.532) 12.80 (.504)
27.40 (1.079) 23.90 (.941)
4
330.00 (14.173) MAX.
60.00 (2.362) MIN.
NOTES : 1. COMFORMS TO EIA-418. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION MEASURED @ HUB. 4. INCLUDES FLANGE DISTORTION @ OUTER EDGE.
30.40 (1.197) MAX.
26.40 (1.039) 24.40 (.961) 3
4
Notes: Repetitive rating; pulse width limited by max. junction temperature. Starting TJ = 25C, L = 0.61mH, RG = 25, IAS = 12A. Pulse width 400s; duty cycle 2%.
This is only applied to TO-220AB pakcage. This is applied to D2Pak, when mounted on 1" square PCB (FR4 or G-10 Material). For recommended footprint and soldering techniques refer to application note #AN-994. Calculated continuous current based on maximum allowable junction temperature. Package limitation current is 30A.
TO-220AB package is not recommended for Surface Mount Application.
Data and specifications subject to change without notice. This product has been designed and qualified for the Industrial market. Qualification Standards can be found on IR's Web site.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 TAC Fax: (310) 252-7903 Visit us at www.irf.com for sales contact information. 07/04
12
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Note: For the most current drawings please refer to the IR website at: http://www.irf.com/package/

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