FDMS3604S [ONSEMI]

不对称双 N 沟道,PowerTrench® 功率级 MOSFET,30V;
FDMS3604S
型号: FDMS3604S
厂家: ONSEMI    ONSEMI
描述:

不对称双 N 沟道,PowerTrench® 功率级 MOSFET,30V

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FDMS3604S  
MOSFET – N-Channel,  
POWERTRENCH), Power  
Stage, Asymetric Dual  
General Description  
www.onsemi.com  
This device includes two specialized NChannel MOSFETs in a  
dual PQFN package. The switch node has been internally connected to  
enable easy placement and routing of synchronous buck converters.  
The control MOSFET (Q1) and synchronous SyncFET(Q2) have  
been designed to provide optimal power efficiency.  
G1  
D1  
D1  
D1  
D1  
PHASE  
(S1/D2)  
Features  
Q1: NChannel  
G2  
S2  
S2  
Max r  
Max r  
= 8 mW at V = 10 V, I = 13 A  
GS D  
= 11 mW at V = 4.5 V, I = 11 A  
S2  
DS(on)  
Top  
Bottom  
DS(on)  
GS  
D
Q2: NChannel  
PQFN8 5x6, 1.27P  
CASE 483AJ  
Max r  
= 2.6 mW at V = 10 V, I = 23 A  
GS D  
DS(on)  
Max r  
= 3.5 mW at V = 4.5 V, I = 21 A  
GS D  
DS(on)  
Low Inductance Packaging Shortens Rise/Fall Times, Resulting in  
Lower Switching Losses  
MARKING DIAGRAM  
MOSFET Integration Enables Optimum Layout for Lower Circuit  
Inductance and Reduced Switch Node Ringing  
This Device is PbFree and is RoHS Compliant  
$Y&Z&3&K  
22CA  
N7CC  
Applications  
Computing  
$Y  
&Z  
&3  
&K  
= ON Semiconductor Logo  
= Assembly Plant Code  
= Numeric Date Code  
= Lot Code  
Communications  
General Purpose Point of Load  
Notebook VCORE  
22CA N7CC  
= Specific Device Code  
PIN CONFIGURATION  
Q2  
S2  
S2  
S2  
G2  
5
6
7
8
4
3
2
1
D1  
D1  
D1  
G1  
PHASE  
Q1  
ORDERING INFORMATION  
See detailed ordering and shipping information on page 2 of  
this data sheet.  
© Semiconductor Components Industries, LLC, 2011  
1
Publication Order Number:  
January, 2020 Rev. 3  
FDMS3604S/D  
FDMS3604S  
MOSFET MAXIMUM RATINGS T = 25°C Unless Otherwise Noted  
A
Symbol  
VDS  
Parameter  
Q1  
30  
33  
20  
Q2  
30  
33  
20  
Units  
Drain to Source Voltage  
V
V
V
A
VDSt  
VGS  
Drain to Source Transient Voltage ( t < 100 ns)  
Transient  
Gate to Source Voltage (Note 3)  
ID  
Drain Current  
Continuous (Package limited)  
TC = 25 °C  
TC = 25 °C  
TA = 25 °C  
30  
60  
40  
130  
Continuous (Silicon limited)  
Continuous  
13 (Note 1a)  
40  
23 (Note 1b)  
100  
Pulsed  
EAS  
PD  
Single Pulse Avalanche Energy  
40 (Note 4)  
2.2 (Note 1a)  
1.0 (Note 1c)  
60 (Note 5)  
2.5 (Note 1b)  
1.0 (Note 1d)  
mJ  
W
Power Dissipation for Single Operation TA = 25 °C  
Power Dissipation for Single Operation TA = 25 °C  
Operating and Storage Junction Temperature Range  
TJ, TSTG  
55 to +150  
°C  
THERMAL CHARACTERISTICS  
Symbol  
Parameter  
Q1  
Q2  
Unit  
°C/W  
57 (Note 1a)  
50 (Note 1b)  
RθJA  
RθJA  
RθJC  
Thermal Resistance, Junction to Ambient  
Thermal Resistance, Junction to Ambient  
Thermal Resistance, Junction to Case  
125 (Note 1c)  
3.5  
120 (Note 1d)  
2
PACKAGE MARKING AND ORDERING INFORMATION  
Device Marking  
Device  
Package  
Reel Size  
Tape Width  
Quantity  
22CA N7CC  
FDMS3604S  
Power 56  
13”  
12 mm  
3000 Units  
www.onsemi.com  
2
FDMS3604S  
ELECTRICAL CHARACTERISTICS T = 25°C Unless Otherwise Noted  
J
Column Head  
Symbol  
Parameter  
Test Conditions  
Type Min  
Typ  
Max  
Units  
OFF CHARACTERISTICS  
BV  
Drain to Source Breakdown  
Voltage  
I
= 250 mA, V = 0 V I = 1 mA,  
GS  
Q1  
Q2  
30  
30  
V
mV/°C  
mA  
DSS  
D
GS  
D
V
= 0 V  
DBV  
DT  
/
Breakdown Voltage Temperature  
Coefficient  
I
D
= 250 mA, referenced to 25°C  
Q1  
Q2  
15  
12  
DSS  
J
D
I
= 10 mA, referenced to 25°C  
I
Zero Gate Voltage Drain Current  
V
V
= 24 V, V = 0 V  
Q1  
Q2  
1
DSS  
DS  
GS  
GS  
500  
I
Gate to Source Leakage Current,  
Forwad  
= 20 V, V = 0 V  
Q1  
Q2  
100  
100  
nA  
GSS  
DS  
ON CHARACTERISTICS  
V
GS(th)  
Gate to Source Threshold Voltage  
V
D
= V , I = 250 mA V = V ,  
DS  
Q1  
Q2  
1.1  
1.1  
2
1.8  
2.7  
3
V
GS  
DS  
D
GS  
I
= 1 mA  
DV  
/
Gate to Source Threshold Voltage  
Temperature Coefficient  
I
I
= 250 mA, referenced to 25°C  
= 10 mA, referenced to 25°C  
Q1  
Q2  
6  
5  
mV/°C  
mW  
GS(th)  
DT  
D
D
J
r
Drain to Source On Resistance  
Forward Transconductance  
V
= 10 V, I = 13 A V = 4.5 V,  
Q1  
5.8  
8.5  
7.8  
8
DS(on)  
GS  
D
GS  
I
= 11 A  
11  
D
V
= 10 V, I = 13 A , T = 125°C  
10.8  
GS  
D
J
V
= 10 V, I = 23 A V = 4.5 V,  
Q2  
2.0  
3.0  
2.6  
2.6  
3.5  
4
GS  
D
GS  
I
= 21 A  
D
V
= 10 V, I = 23 A , T = 125°C  
GS  
D
J
g
V
= 5 V, I = 13 A V = 5 V, I = 23 A  
Q1  
Q2  
61  
130  
S
FS  
DS  
D
DS  
D
DYNAMIC CHARACTERISTICS  
C
Input Capacitance  
Q1:  
DS  
Q2:  
Q1  
Q2  
1340 1785  
3240 4310  
pF  
pF  
pF  
W
iss  
V
= 15 V, V = 0 V, f = 1 MHz  
GS  
C
Output Capacitance  
Reverse Transfer Capacitance  
Gate Resistance  
Q1  
Q2  
485  
645  
oss  
V
= 15 V, V = 0 V, f = 1 MHz  
DS GS  
1230 1635  
C
Q1  
Q2  
53  
103  
80  
155  
rss  
R
Q1  
Q2  
0.2  
0.2  
0.6  
0.8  
2
3
g
SWITCHING CHARACTERISTICS  
t
TurnOn Delay Time  
Q1:  
DD  
Q2:  
Q1  
Q2  
8.2  
13  
16  
23  
ns  
ns  
d(on)  
V
= 15 V, I = 13 A, R  
= 6 W  
= 6 W  
D
GEN  
t
r
Rise Time  
Q1  
Q2  
2.5  
4.8  
10  
10  
V
= 15 V, I = 23 A, R  
DD D  
GEN  
t
TurnOff Delay Time  
Fall Time  
Q1  
Q2  
20  
31  
32  
50  
ns  
d(off)  
t
f
Q1  
Q2  
2.2  
3.4  
10  
10  
ns  
Q
Q
Total Gate Charge  
Total Gate Charge  
Gate to Source Gate Charge  
Gate to Drain “Miller” Charge  
V
V
= 0 V to 10 V  
= 0 V to 4.5 V  
Q1  
DD  
Q1  
Q2  
21  
47  
29  
66  
nC  
nC  
nC  
nC  
g
g
GS  
V
= 15 V, I = 13 A  
D
Q2  
Q1  
Q2  
10  
22  
14  
31  
GS  
V
DD  
= 15 V, I = 23 A  
D
Q
Q1  
Q2  
3.9  
9
gs  
Q
Q1  
Q2  
3.1  
5.5  
gd  
www.onsemi.com  
3
FDMS3604S  
ELECTRICAL CHARACTERISTICS T = 25°C Unless Otherwise Noted (continued)  
J
Column Head  
Symbol  
Parameter  
Test Conditions  
Type Min  
Typ  
Max  
Units  
DRAINSOURCE DIODE CHARACTERISTICS  
V
SD  
Source to Drain Diode Forward  
Voltage  
V
GS  
V
GS  
= 0 V, I = 13 A(Note 2)  
Q1  
Q2  
0.8  
0.8  
1.2  
1.2  
V
S
= 0 V, I = 23 A(Note 2)  
S
t
Reverse Recovery Time  
Q1  
F
Q2  
Q1  
Q2  
25  
32  
40  
51  
ns  
nC  
rr  
I = 13 A, di/dt = 100 A/ms  
Q
Reverse Recovery Charge  
Q1  
Q2  
9
39  
18  
62  
rr  
I = 23 A, di/dt = 300 A/ms  
F
1. R  
is determined with the device mounted on a 1 in2 pad 2 oz copper pad on a 1.5 x 1.5 in. board of FR4 material. R  
is guaranteed  
JC  
q
q
JA  
by design while R  
is determined by the user’s board design.  
q
CA  
b. 50 °C/W when mounted on  
a. 57 °C/W when mounted on  
2
a 1 in pad of 2 oz copper  
2
a 1 in pad of 2 oz copper  
c. 125 °C/W when mounted on a  
minimum pad of 2 oz copper  
d. 120 °C/W when mounted on a  
minimum pad of 2 oz copper  
2. Pulse Test: Pulse Width < 300 ms, Duty cycle < 2.0%.  
3. As an Nch device, the negative Vgs rating is for low duty cycle pulse ocurrence only. No continuous rating is implied.  
4. E of 40 mJ is based on starting T = 25°C; Nch: L = 1 mH, I = 9 A, V = 27 V, V = 10 V. 100% test at L = 0.3 mH, I = 14 A.  
AS  
J
AS  
DD  
GS  
AS  
5. E of 60 mJ is based on starting T = 25°C; Nch: L = 1 mH, I = 11 A, V = 27 V, V = 10 V. 100% test at L = 0.3 mH, I = 18 A.  
AS  
J
AS  
DD  
GS  
AS  
www.onsemi.com  
4
 
FDMS3604S  
TYPICAL CHARACTERISTICS (Q1 NCHANNEL)  
T = 25°C Unless Otherwise Noted  
J
40  
30  
20  
10  
0
4
3
2
1
VGS = 3.5 V  
ms  
PULSE DURATION = 80  
DUTY CYCLE = 0.5% MAX  
10 V  
VGS  
=
= 6 V  
VGS  
VGS = 4.5 V  
VGS = 4 V  
4 V  
=
VGS  
VGS = 4.5 V  
VGS = 6 V  
3.5 V  
=
VGS  
10 V  
=
VGS  
ms  
PULSE DURATION = 80  
DUTY CYCLE = 0.5% MAX  
0
0
10  
20  
30  
40  
0.0  
0.2  
0.4  
0.6  
0.8  
1.0  
, DRAIN TO SOURCE VOLTAGE (V)  
VDS  
ID, DRAIN CURRENT (A)  
Figure 2. Normalized OnResistance vs Drain  
Figure 1. OnRegion Characteristics  
Current and Gate Voltage  
1.6  
1.4  
1.2  
1.0  
0.8  
0.6  
20  
ID = 13 A  
ms  
PULSE DURATION = 80  
DUTY CYCLE = 0.5% MAX  
VGS = 10 V  
16  
12  
8
ID = 13 A  
TJ = 125oC  
4
TJ = 25oC  
0
75 50 25  
0
25 50 75 100 125 150  
2
4
6
8
10  
, JUNCTION TEMPERATURE (oC)  
TJ  
, GATE TO SOURCE VOLTAGE (V)  
VGS  
Figure 3. Normalized On Resistance  
vs Junction Temperature  
Figure 4. OnResistance vs Gate to Source  
Voltage  
1000  
100  
SINGLE PULSE  
RqJA = 1255C/W  
10  
ms  
100  
100  
TA = 255C  
1 ms  
1
10  
10 ms  
100 ms  
1 s  
THIS AREA IS  
LIMITED BY r  
DS(on)  
1
SINGLE PULSE  
0.1  
T
J = MAX RATED  
10 s  
JA = 125oC/W  
R
q
DC  
TA = 25oC  
100  
102  
t, PULSE WIDTH (sec)  
0.01  
0.01  
0.1  
104  
0.1
31
100 1000  
1
10  
200  
10  
10  
1
10  
VDS,DRAINtoSOURCEVOLTAGE(V)  
Figure 5. Transfer Characteristics  
Figure 6. Source to Drain Diode  
Forward Voltage vs Source Current  
www.onsemi.com  
5
FDMS3604S  
TYPICAL CHARACTERISTICS (Q1 NCHANNEL)  
T = 25°C Unless Otherwise Noted (continued)  
J
10  
8
2000  
1000  
ID = 13 A  
VDD = 10 V  
Ciss  
VDD = 15 V  
Coss  
6
VDD = 20 V  
100  
4
Crss  
2
f = 1 MHz  
GS = 0 V  
V
0
10  
0
5
10  
15  
20  
25  
0.1  
1
10  
30  
VDS, DRAIN TO SOURCE VOLTAGE (V)  
Qg, GATE CHARGE (nC)  
Figure 8. Capacitance vs Drain to Source Voltage  
Figure 7. Gate Charge Characteristics  
20  
100  
R
qJC = 3.5 oC/W  
80  
60  
40  
20  
0
10  
V
GS = 10 V  
TJ = 25 oC  
V
GS = 4.5 V  
TJ = 100oC  
TJ = 125oC  
Limited by Package  
1
0.01  
0.1  
1
10  
100  
25  
50  
75  
100  
125  
150  
T , CASE TEMPERATUREo(C)  
tAV, TIME IN AVALANCHE (ms)  
C
Figure 9. Unclamped Inductive Switching  
Capability  
Figure 10. Maximum Continuous Drain Current  
vs Case Temperature  
100  
1000  
SINGLE PULSE  
qJA = 125oC/W  
100  
R
10  
1
100  
10  
1
T
A = 25oC  
1 ms  
10 ms  
THIS AREA IS  
r
LIMITED BY  
100 ms  
DS(on)  
SINGLE PULSE  
TJ = MAX RATED  
1 s  
0.1  
10 s  
= 125o  
R
C/W  
q
JA  
DC  
TA = 25o  
C
0.01  
0.01  
0.1  
104  
103  
102  
t, PULSE WIDTH (sec)  
101  
1
10  
0.1  
1
10  
100  
200  
100 1000  
VDS, DRAIN to SOURCE VOLTAGE (V)  
Figure 11. Forward Bias Safe Operating Area  
Figure 12. Single Pulse Maximum Power  
Dissipation  
www.onsemi.com  
6
FDMS3604S  
TYPICAL CHARACTERISTICS (Q1 NCHANNEL)  
T = 25°C Unless Otherwise Noted (continued)  
J
2
1
DUTY CYCLEDESCENDING ORDER  
D = 0.5  
0.2  
0.1  
0.05  
0.02  
0.01  
0.1  
0.01  
P
DM  
t
1
t
2
SINGLE PULSE  
qJA = 125 oC/W  
(Note 1c)  
NOTES:  
DUTY FACTOR: D = t /t  
R
1
2
PEAK T = P  
J
x Z  
x R  
+ T  
DM  
qJA  
qJA A  
0.001  
104  
103  
102  
101  
t, RECTANGULAR PULSE DURATION (sec)  
11  
0
100  
1000  
Figure 13. JunctiontoAmbient Transient Thermal Response Curve  
www.onsemi.com  
7
FDMS3604S  
TYPICAL CHARACTERISTICS (Q2 NCHANNEL)  
T = 25°C Unless Otherwise Noted  
J
100  
80  
60  
40  
20  
0
8
6
4
ms  
PULSE DURATION = 80  
V
GS = 10 V  
VGS = 4.5 V  
VGS = 4 V  
DUTY CYCLE = 0.5% MAX  
VGS = 3 V  
VGS = 3.5 V  
V
= 3.5 V  
GS  
ms  
PULSE DURATION = 80  
DUTY CYCLE = 0.5% MAX  
VGS = 4.5 V  
VGS = 4 V  
2
0
VGS = 3 V  
VGS = 10 V  
0
20  
40  
60  
80  
100  
0.0  
0.2  
0.4  
0.6  
0.8  
1.0  
V
DS, DRAIN TO SOURCE VOLTAGE (V)  
I
D, DRAIN CURRENT (A)  
Figure 15. Normalized OnResistance vs Drain  
Figure 14. OnRegion Characteristics  
Current and Gate Voltage  
1.6  
1.4  
1.2  
1.0  
0.8  
12  
ID = 23 A  
VGS = 10 V  
PULSE DURATION = 80ms  
DUTY CYCLE = 0.5% MAX  
9
ID = 23 A  
6
TJ = 125 oC  
3
TJ = 25 o  
C
0
2
4
6
8
10  
75 50 25  
0
25 50 75 100 125 150  
TJ, JUNCTION TEMPERATUREo(C)  
V
GS, GATE TO SOURCE VOLTAGE (V)  
Figure 16. Normalized OnResistance vs Junction  
Figure 17. OnResistance vs Gate to Source  
Temperature  
Voltage  
100  
100  
PULSE DURATION = 80 ms  
DUTY CYCLE = 0.5% MAX  
VGS = 0 V  
TJ = 125 o  
80  
10  
1
C
VDS = 5 V  
60  
TJ = 125 o  
C
T
J = 25 oC  
40  
20  
0
0.1  
TJ = 25 o  
C
TJ = 55oC  
0.01  
T
J = 55oC  
0.001  
1.5  
2.0  
2.5  
3.0  
3.5  
4.0  
0.0  
0.2  
0.4  
0.6  
0.8  
1.0  
1.2  
VGS, GATE TO SOURCE VOLTAGE (V)  
VSD, BODY DIODE FORWARD VOLTAGE (V)  
Figure 18. Transfer Characteristics  
Figure 19. Source to Drain Diode Forward Voltage  
vs Source Current  
www.onsemi.com  
8
FDMS3604S  
TYPICAL CHARACTERISTICS (Q2 NCHANNEL)  
T = 25°C Unless Otherwise Noted (continued)  
J
10  
8
10000  
1000  
ID = 23 A  
Ciss  
VDD = 10 V  
Coss  
6
VDD = 15 V  
4
100  
10  
V
DD = 20 V  
Crss  
2
f = 1 MHz  
= 0 V  
V
GS  
0
0.1  
1
10  
30  
0
10  
20  
30  
40  
50  
VDS, DRAIN TO SOURCE VOLTAGE (V)  
Qg, GATE CHARGE (nC)  
Figure 21. Capacitance vs Drain to Source Voltage  
Figure 20. Gate Charge Characteristics  
50  
10  
160  
R
qJC = 2 oC/W  
120  
80  
40  
0
TJ = 25 oC  
V
GS = 10 V  
TJ = 100 oC  
VGS = 4.5 V  
TJ = 125 o  
C
Limited by Package  
1
0.01  
0.1  
1
10  
100  
1000  
25  
50  
75  
100  
125  
150  
T , CASE TEMPERATUREo(C)  
tAV, TIME IN AVALANCHE (ms)  
C
Figure 22. Unclamped Inductive Switching  
Capability  
Figure 23. Maximum Continuous Drain Current  
vs Case Temperature  
1000  
200  
100  
SINGLE PULSE  
qJA = 120oC/W  
R
100  
10  
1
1 ms  
T
A = 25oC  
10  
10 ms  
THIS AREA IS  
LIMITED BY r  
1
100 ms  
DS(on)  
1s  
SINGLE PULSE  
TJ = MAX RATED  
0.1  
0.01  
10s  
R
qJA = 120 oC/W  
DC  
TA = 25 oC  
0.1  
103  
102  
101  
t, PULSE WIDTH (sec)  
1
10  
100  
1000  
0.01  
0.1  
1
10  
100200  
VDS, DRAIN to SOURCE VOLTAGE (V)  
Figure 24. Forward Bias Safe Operating Area  
Figure 25. Single Pulse Maximum Power  
Dissipation  
www.onsemi.com  
9
FDMS3604S  
TYPICAL CHARACTERISTICS (Q2 NCHANNEL)  
T = 25°C Unless Otherwise Noted (continued)  
J
2
1
DUTY CYCLEDESCENDING ORDER  
D = 0.5  
0.2  
0.1  
0.05  
0.02  
0.01  
P
0.1  
0.01  
DM  
t
1
t
2
SINGLE PULSE  
qJA= 120 o  
NOTES:  
DUTY FACTOR: D = t /t  
R
C/W  
1
2
PEAK T = P x Z  
x R  
+ T  
qJA A  
(Note 1c)  
J
DM  
qJA  
0.001  
103  
102  
101  
t, RECTANGULAR PULSE DURATION (sec)  
1
10  
100  
1000  
Figure 26. JunctiontoAmbient Transient Thermal Response Curve  
SyncFET Schottky Body Diode Characteristics  
ON Semiconductor’s SyncFET process embeds a  
Schottky diode in parallel with PowerTrench MOSFET.  
This diode exhibits similar characteristics to a discrete  
external Schottky diode in parallel with a MOSFET.  
Figure 27 shows the reverse recovery characteristic of the  
FDMS3604S.  
Schottky barrier diodes exhibit significant leakage at high  
temperature and high reverse voltage. This will increase the  
power in the device.  
102  
25  
TJ = 125 oC  
20  
103  
didt = 300 A/ms  
TJ = 100 oC  
15  
10  
5
104  
105  
TJ = 25 o  
C
0
106  
5  
0
50  
100  
TIME (ns)  
150  
200  
0
5
10  
15  
20  
25  
30  
VDS, REVERSE VOLTAGE (V)  
Figure 27. FDMS3604S SyncFET Body  
Diode Reverse Recovery Characteristics  
Figure 28. SyncFET Body Diode Reverse  
Leakage versus Drainsource Voltage  
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10  
 
FDMS3604S  
APPLICATION INFORMATION  
Switch Node Ringing Suppression  
ON Semiconductor’s Power Stage products incorporate a  
proprietary design* that minimizes the peak overshoot,  
ringing voltage on the switch node (PHASE) without the  
need of any external snubbing components in a buck  
converter. As shown in the Figure 29, the Power Stage  
solution rings significantly less than competitor solutions  
under the same set of test conditions.  
Power Stage Device  
*Patent Pending  
Competitorrs Solution  
Figure 29. Power Stage Phase Node Rising Edge, High Turn On  
Figure 30. Shows the Power Stage in a Buck Converter Topology  
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11  
 
FDMS3604S  
Recommended PCB Layout Guidelines  
As a PCB designer, it is necessary to address critical issues  
in layout to minimize losses and optimize the performance  
of the power train. Power Stage is a high power density  
solution and all high current flow paths, such as VIN (D1),  
PHASE (S1/D2) and GND (S2), should be short and wide  
for better and stable current flow, heat radiation and system  
performance. recommended layout procedure is  
discussed below to maximize the electrical and thermal  
performance of the part.  
A
Figure 31. Recommended PCB Layout  
Following is a guideline, not a requirement which the PCB designer should consider:  
1. Input ceramic bypass capacitors C1 and C2 must  
be placed close to the D1 and S2 pins of Power  
Stage to help reduce parasitic inductance and High  
Frequency conduction loss induced by switching  
operation. C1 and C2 show the bypass capacitors  
placed close to the part between D1 and S2. Input  
capacitors should be connected in parallel close to  
the part. Multiple input caps can be connected  
depending upon the application  
2. The PHASE copper trace serves two purposes; In  
addition to being the current path from the Power  
Stage package to the output inductor (L), it also  
serves as heat sink for the lower FET in the Power  
Stage package. The trace should be short and wide  
enough to present a low resistance path for the  
high current flow between the Power Stage and the  
inductor. This is done to minimize conduction  
losses and limit temperature rise. Please note that  
the PHASE node is a high voltage and high  
frequency switching node with high noise  
3. Output inductor location should be as close as  
possible to the Power Stage device for lower  
power loss due to copper trace resistance. A  
shorter and wider PHASE trace to the inductor  
reduces the conduction loss. Preferably the Power  
Stage should be directly in line (as shown in  
Figure 32) with the inductor for space savings and  
compactness  
4. The POWERTRENCH Technology MOSFETs  
used in the Power Stage are effective at  
minimizing phase node ringing. It allows the part  
to operate well within the breakdown voltage  
limits. This eliminates the need to have an external  
snubber circuit in most cases. If the designer  
chooses to use an RC snubber, it should be placed  
close to the part between the PHASE pad and S2  
pins to dampen the highfrequency ringing  
5. The driver IC should be placed close to the Power  
Stage part with the shortest possible paths for the  
High Side gate and Low Side gates through a wide  
trace connection. This eliminates the effect of  
parasitic inductance and resistance between the  
driver and the MOSFET and turns the devices on  
and off as efficiently as possible. At  
potential. Care should be taken to minimize  
coupling to adjacent traces. The reference layout  
in Figure 31 shows a good balance between the  
thermal and electrical performance of Power Stage  
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12  
 
FDMS3604S  
higherfrequency operation this impedance can  
limit the gate current trying to charge the  
MOSFET input capacitance. This will result in  
slower rise and fall times and additional switching  
losses. Power Stage has both the gate pins on the  
same side of the package which allows for back  
mounting of the driver IC to the board. This  
provides a very compact path for the drive signals  
and improves efficiency of the part  
7. Use multiple vias on each copper area to  
interconnect top, inner and bottom layers to help  
smooth current flow and heat conduction. Vias  
should be relatively large, around 8 mils to 10  
mils, and of reasonable inductance. Critical high  
frequency components such as ceramic bypass  
caps should be located close to the part and on the  
same side of the PCB. If not feasible, they should  
be connected from the backside via a network of  
low inductance vias  
6. S2 pins should be connected to the GND plane  
with multiple vias for a low impedance grounding.  
Poor grounding can create a noise transient offset  
voltage level between S2 and driver ground. This  
could lead to faulty operation of the gate driver  
and MOSFET  
SyncFET IS trademark of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries.  
POWERTRENCH is registered trademark of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other  
countries.  
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13  
MECHANICAL CASE OUTLINE  
PACKAGE DIMENSIONS  
PQFN8 5X6, 1.27P (SAWN TYPE)  
CASE 483AJ  
ISSUE A  
DATE 08 FEB 2021  
Electronic versions are uncontrolled except when accessed directly from the Document Repository.  
Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.  
DOCUMENT NUMBER:  
DESCRIPTION:  
98AON13659G  
PQFN8 5X6, 1.27P  
PAGE 1 OF 2  
ON Semiconductor and  
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.  
ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding  
the suitability of its products for any particular purpose, nor does ON 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 special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the  
rights of others.  
© Semiconductor Components Industries, LLC, 2019  
www.onsemi.com  
MECHANICAL CASE OUTLINE  
PACKAGE DIMENSIONS  
PQFN8 5X6, 1.27P (PUNCHED TYPE)  
CASE 483AJ  
ISSUE A  
DATE 08 FEB 2021  
0.10  
(2X)  
C
D
SEE  
DETAIL B  
PKG  
c
C
L
5
8
L2  
PKG  
C
L
E
E1  
(SCALE: 2X)  
0.10  
(2X)  
C
1
4
b1 (8X)  
TOP VIEW  
0.10  
0.08  
C
C
D1  
c
SEE  
DETAIL C  
A
8X  
C
SEATING  
PLANE  
SIDE VIEW  
D2  
(SCALE: 2X)  
0.10  
0.05  
C
C
A B  
e/2  
z1  
L1 (3X)  
1
2
3
4
E3 (6X)  
E4  
k
e4  
E2  
k1  
e3  
D3  
6
8
7
5
L (5X)  
z (3X)  
b (8X)  
e
e1  
BOTTOM VIEW  
Electronic versions are uncontrolled except when accessed directly from the Document Repository.  
Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.  
DOCUMENT NUMBER:  
DESCRIPTION:  
98AON13659G  
PQFN8 5X6, 1.27P  
PAGE 2 OF 2  
ON Semiconductor and  
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.  
ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding  
the suitability of its products for any particular purpose, nor does ON 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 special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the  
rights of others.  
© Semiconductor Components Industries, LLC, 2019  
www.onsemi.com  
onsemi,  
, and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates  
and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.  
A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/PatentMarking.pdf. onsemi reserves the right to make changes at any time to any  
products or information herein, without notice. The information herein is provided “asis” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the  
information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi 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 special, consequential or incidental damages. Buyer is responsible for its products  
and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information  
provided by onsemi. “Typical” parameters which may be provided in onsemi 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. onsemi does not convey any license  
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