FDS6984AS [ONSEMI]

30V双通道笔记本电源N沟道PowerTrench® SyncFET™;
FDS6984AS
型号: FDS6984AS
厂家: ONSEMI    ONSEMI
描述:

30V双通道笔记本电源N沟道PowerTrench® SyncFET™

开关 光电二极管 晶体管
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May 2008  
FDS6984AS  
Dual Notebook Power Supply N-Channel PowerTrench® SyncFET™  
General Description  
Features  
The FDS6984AS is designed to replace two single  
SO-8 MOSFETs and Schottky diode in synchronous  
DC:DC power supplies that provide various peripheral  
voltages for notebook computers and other battery  
powered electronic devices. FDS6984AS contains two  
unique 30V, N-channel, logic level, PowerTrench  
MOSFETs designed to maximize power conversion  
efficiency.  
Q2:  
Optimized to minimize conduction losses  
Includes SyncFET Schottky diode  
8.5A, 30V RDS(on) max= 20 m@ VGS = 10V  
RDS(on) max= 28 m@ VGS = 4.5V  
Q1:  
Optimized for low switching losses  
Low gate charge (8nC typical)  
5.5A, 30V  
RDS(on) max= 31 m@ VGS = 10V  
The high-side switch (Q1) is designed with specific  
emphasis on reducing switching losses while the low-  
side switch (Q2) is optimized to reduce conduction  
losses. Q2 also includes a patented combination of a  
RDS(on) max= 40 m@ VGS = 4.5V  
MOSFET monolithically integrated with  
diode.  
a
Schottky  
RoHS Compliant  
D1  
D1  
5
6
7
4
D2  
Q1  
3
2
1
D2  
Q2  
G1  
8
S1  
SO-8  
G2  
S2  
Absolute Maximum Ratings TA = 25°C unless otherwise noted  
Symbol  
Parameter  
Q2  
Q1  
Units  
VDSS  
VGSS  
ID  
Drain-Source Voltage  
30  
±20  
8.5  
30  
30  
±20  
5.5  
20  
V
V
A
Gate-Source Voltage  
Drain Current - Continuous  
- Pulsed  
(Note 1a)  
PD  
Power Dissipation for Dual Operation  
Power Dissipation for Single Operation  
2
W
(Note 1a)  
(Note 1b)  
1.6  
1
0.9  
(Note 1c)  
TJ, TSTG  
Operating and Storage Junction Temperature Range  
–55 to +150  
°C  
Thermal Characteristics  
Thermal Resistance, Junction-to-Ambient  
Thermal Resistance, Junction-to-Case  
(Note 1a)  
(Note 1)  
78  
40  
RθJA  
°C/W  
°C/W  
RθJC  
Package Marking and Ordering Information  
Device Marking  
Device  
Reel Size  
Tape width  
Quantity  
FDS6984AS  
FDS6984AS  
13”  
12mm  
2500 units  
FDS6984AS Rev A1(X)  
©2008 Fairchild Semiconductor Corporation  
Electrical Characteristics  
TA = 25°C unless otherwise noted  
Symbol  
Parameter  
Test Conditions  
Type Min Typ Max Units  
Off Characteristics  
BVDSS  
IDSS  
Drain-Source Breakdown  
VGS = 0 V, ID = 1 mA  
VGS = 0 V, ID = 250 µA  
Q2  
Q1  
30  
30  
V
Voltage  
Zero Gate Voltage Drain  
Current  
VDS = 24 V, VGS = 0 V  
Q2  
Q1  
500  
1
µA  
Q2  
Q1  
All  
2.3  
79  
mA  
nA  
nA  
VDS = 24 V, VGS = 0 V, TJ = 125°C  
IGSS  
Gate-Body Leakage  
V
GS = ±20 V, VDS = 0 V  
±100  
On Characteristics  
(Note 2)  
VGS(th)  
Gate Threshold Voltage  
VDS = VGS, ID = 1 mA  
DS = VGS, ID = 250 µA  
ID = 1 mA, Referenced to 25°C  
ID = 250 uA, Referenced to 25°C  
VGS = 10 V, ID = 8.5 A  
Q2  
Q1  
Q2  
Q1  
1
1
1.7  
1.8  
–3  
3
3
V
V
Gate Threshold Voltage  
Temperature Coefficient  
VGS(th)  
TJ  
mV/°C  
mΩ  
–4  
RDS(on)  
Static Drain-Source  
On-Resistance  
Q2  
17  
24  
21  
20  
32  
28  
V
V
GS = 10 V, ID = 8.5 A, TJ = 125°C  
GS = 4.5 V, ID = 7 A  
VGS = 10 V, ID = 5.5 A  
Q1  
26  
34  
32  
31  
43  
40  
VGS = 10 V, ID = 5.5 A, TJ = 125°C  
V
GS = 4.5 V, ID = 4.6 A  
ID(on)  
gFS  
On-State Drain Current  
VGS = 10 V, VDS = 5 V  
Q2  
Q1  
Q2  
Q1  
30  
20  
A
S
Forward Transconductance  
VDS = 5 V, ID = 8.5 A  
VDS = 5 V, ID = 5.5 A  
25  
18  
Dynamic Characteristics  
Ciss  
Coss  
Crss  
RG  
Input Capacitance  
VDS = 15 V, VGS = 0 V,  
f = 1.0 MHz  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
530  
420  
170  
120  
60  
50  
3.1  
2.2  
pF  
pF  
pF  
Output Capacitance  
Reverse Transfer Capacitance  
Gate Resistance  
VGS = 15mV, f = 1.0 MHz  
FDS6984AS Rev A1 (X)  
Electrical Characteristics (continued)  
Symbol Parameter Test Conditions  
Switching Characteristics (Note 2)  
TA = 25°C unless otherwise noted  
Type Min Typ Max Units  
td(on)  
tr  
td(off)  
tf  
td(on)  
tr  
td(off)  
tf  
Qg(TOT)  
Qg  
Turn-On Delay Time  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
Q2  
Q1  
8
9
5
16  
18  
10  
12  
37  
35  
8
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
nC  
nC  
nC  
nC  
Turn-On Rise Time  
V
DD = 15 V, ID = 1 A,  
6
Turn-Off Delay Time  
Turn-Off Fall Time  
23  
22  
4
2
9
10  
7
11  
13  
13  
4
3
10  
8
5
4
1.5  
1.3  
1.9  
1.5  
VGS = 10V, RGEN = 6 Ω  
4
Turn-On Delay Time  
Turn-On Rise Time  
18  
19  
14  
20  
24  
24  
8
VDD = 15 V, ID = 1 A,  
Turn-Off Delay Time  
Turn-Off Fall Time  
V
GS = 4.5V, RGEN = 6 Ω  
6
Total Gate Charge, Vgs = 10V  
Total Gate Charge, Vgs = 5V  
Gate-Source Charge  
Gate-Drain Charge  
14  
11  
8
Q2:  
V
DS = 15 V, ID = 8.5 A  
6
Qgs  
Qgd  
Q1:  
V
DS = 15 V, ID = 5.5 A  
Drain–Source Diode Characteristics and Maximum Ratings  
IS  
Maximum Continuous Drain-Source Diode Forward Current  
Q2  
Q1  
Q2  
3.0  
1.3  
A
ns  
trr  
Reverse Recovery Time  
Reverse Recovery Charge  
Reverse Recovery Time  
Reverse Recovery Charge  
IF = 10A,  
dIF/dt = 300 A/µs  
13  
6
(Note 3)  
Qrr  
trr  
nC  
ns  
Q1  
IF = 5.5A,  
dIF/dt = 100 A/µs  
17  
6
(Note 3)  
Qrr  
VSD  
nC  
V
Drain-Source Diode Forward VGS = 0 V, IS = 2.3 A  
Voltage VGS = 0 V, IS = 1.3 A  
(Note 2)  
(Note 2)  
Q2  
Q1  
0.6  
0.8  
0.7  
1.2  
Notes:  
1. RθJA is the sum of the junction-to-case and case-to-ambient thermal resistance where the case thermal reference is defined as the solder mounting surface of  
the drain pins. RθJC is guaranteed by design while RθCA is determined by the user's board design.  
a)  
78°C/W when  
mounted on a  
0.5in2 pad of 2  
oz copper  
b)  
125°C/W when  
mounted on a  
0.02 in2 pad of  
2 oz copper  
c)  
135°C/W when  
mounted on a  
minimum pad.  
Scale 1 : 1 on letter size paper  
2. See “SyncFET Schottky body diode characteristics” below.  
3. Pulse Test: Pulse Width < 300µs, Duty Cycle < 2.0%  
FDS6984AS Rev A 1(X)  
Typical Characteristics: Q2  
2
1.8  
1.6  
1.4  
1.2  
1
30  
VGS = 3.0V  
VGS = 10V  
6.0V  
3.5V  
25  
20  
15  
10  
5
4.0V  
4.5V  
3.0V  
3.5V  
4.0V  
4.5V  
5.0V  
6.0V  
10V  
2.5V  
0
0.8  
0
0.5  
1
1.5  
2
2.5  
3
150  
4
0
5
10  
15  
20  
25  
30  
VDS, DRAIN-SOURCE VOLTAGE (V)  
ID, DRAIN CURRENT (A)  
Figure 1. On-Region Characteristics.  
Figure 2. On-Resistance Variation with  
Drain Current and Gate Voltage.  
0.06  
0.05  
0.04  
0.03  
0.02  
0.01  
1.6  
ID = 8.5A  
GS = 10V  
ID = 4.25A  
V
1.45  
1.3  
1.15  
1
TA = 125oC  
TA = 25oC  
0.85  
0.7  
-50  
-25  
0
25  
50  
75  
100  
125  
2
4
6
8
10  
TJ, JUNCTION TEMPERATURE (oC)  
VGS, GATE TO SOURCE VOLTAGE (V)  
Figure 3. On-Resistance Variation with  
Temperature.  
Figure 4. On-Resistance Variation with  
Gate-to-Source Voltage.  
100  
30  
25  
20  
15  
10  
5
VGS = 0V  
VDS = 5V  
10  
1
0.1  
TA = 125oC  
25oC  
TA = 125oC  
-55oC  
-55oC  
25oC  
0.01  
0.001  
0
1
1.5  
2
2.5  
3
3.5  
0
0.2  
0.4  
0.6  
0.8  
1
V
GS, GATE TO SOURCE VOLTAGE (V)  
VSD, BODY DIODE FORWARD VOLTAGE (V)  
Figure 5. Transfer Characteristics.  
Figure 6. Body Diode Forward Voltage Variation  
with Source Current and Temperature.  
FDS6984AS Rev A1 (X)  
Typical Characteristics: Q2  
10  
800  
600  
400  
200  
0
f = 1MHz  
VGS = 0 V  
ID =8.5A  
8
VDS = 10V  
Ciss  
20V  
6
15V  
4
Coss  
2
0
Crss  
0
2
4
6
8
10  
12  
0
5
10  
15  
20  
25  
30  
Qg, GATE CHARGE (nC)  
VDS, DRAIN TO SOURCE VOLTAGE (V)  
Figure 7. Gate Charge Characteristics.  
Figure 8. Capacitance Characteristics.  
100  
50  
40  
30  
20  
10  
0
RDS(ON) LIMIT  
SINGLE PULSE  
RθJA = 135°C/W  
TA = 25°C  
100 s  
µ
1ms  
10  
10ms  
100ms  
1s  
10s  
1
DC  
VGS = 10V  
0.1  
0.01  
SINGLE PULSE  
RθJA = 135oC/W  
T
A = 25oC  
0.001  
0.01  
0.1  
1
10  
100  
1000  
0.1  
1
10  
100  
V
DS, DRAIN-SOURCE VOLTAGE (V)  
t1, TIME (sec)  
Figure 9. Maximum Safe Operating Area.  
Figure 10. Single Pulse Maximum  
Power Dissipation.  
FDS6984AS Rev A1 (X)  
Typical Characteristics Q1  
2.4  
2.2  
2
20  
VGS = 10V  
6.0V  
4.0V  
VGS = 3.0V  
4.5V  
3.5V  
16  
12  
8
1.8  
1.6  
1.4  
1.2  
1
3.5V  
4.0V  
3.0V  
4.5V  
5.0V  
6.0V  
4
10V  
2.5V  
0.8  
0
0
5
10  
ID, DRAIN CURRENT (A)  
15  
20  
0
0.5  
1
1.5  
2
2.5  
3
VDS, DRAIN-SOURCE VOLTAGE (V)  
Figure 11. On-Region Characteristics.  
Figure 12. On-Resistance Variation with  
Drain Current and Gate Voltage.  
0.1  
1.6  
ID = 5.5A  
VGS = 10V  
ID = 2.75A  
1.4  
1.2  
1
0.08  
0.06  
0.04  
0.02  
TA = 125oC  
0.8  
0.6  
TA = 25oC  
-50  
-25  
0
25  
50  
75  
100  
125  
150  
2
4
6
8
10  
TJ, JUNCTION TEMPERATURE (oC)  
VGS, GATE TO SOURCE VOLTAGE (V)  
Figure 13. On-Resistance Variation with  
Temperature.  
Figure 14. On-Resistance Variation with  
Gate-to-Source Voltage.  
100  
20  
16  
12  
8
VGS = 0V  
VDS = 5V  
10  
1
TA = 125oC  
0.1  
25oC  
-55oC  
0.01  
TA = 125oC  
-55oC  
4
0.001  
25oC  
0.0001  
0
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
0.5  
1.5  
2.5  
3.5  
4.5  
VGS, GATE TO SOURCE VOLTAGE (V)  
VSD, BODY DIODE FORWARD VOLTAGE (V)  
Figure 15. Transfer Characteristics.  
Figure 16. Body Diode Forward Voltage Variation  
with Source Current and Temperature.  
FDS6984AS Rev A1 (X)  
Typical Characteristics Q1  
600  
500  
400  
300  
200  
100  
0
10  
f = 1MHz  
VGS = 0 V  
ID = 5.5A  
8
VDS = 10V  
20V  
Ciss  
6
15V  
4
Coss  
2
0
Crss  
0
5
10  
15  
20  
0
2
4
6
8
10  
Qg, GATE CHARGE (nC)  
VDS, DRAIN TO SOURCE VOLTAGE (V)  
Figure 17. Gate Charge Characteristics.  
Figure 18. Capacitance Characteristics.  
100  
50  
40  
30  
20  
10  
0
SINGLE PULSE  
RθJA = 135°C/W  
TA = 25°C  
RDS(ON) LIMIT  
100  
1ms  
µ
s
10  
1
10ms  
100ms  
1s  
10s  
DC  
VGS = 10V  
0.1  
0.01  
SINGLE PULSE  
RθJA = 135oC/W  
TA = 25oC  
0.001  
0.01  
0.1  
1
10  
100  
1000  
0.1  
1
10  
100  
VDS, DRAIN-SOURCE VOLTAGE (V)  
t1, TIME (sec)  
Figure 19. Maximum Safe Operating Area.  
Figure 20. Single Pulse Maximum  
Power Dissipation.  
1
D = 0.5  
RθJA(t) = r(t) * Rθ  
JA  
0.2  
RθJA = 135°C/W  
0.1  
0.1  
0.05  
0.02  
P(pk)  
t1  
0.01  
t2  
0.01  
SINGLE PULSE  
TJ - TA = P * RθJA(t)  
Duty Cycle, D = t1 / t2  
0.001  
0.0001  
0.001  
0.01  
0.1  
1
10  
100  
1000  
t1, TIME (sec)  
Figure 21. Transient Thermal Response Curve.  
Thermal characterization performed using the conditions described in Note 1c.  
Transient thermal response will change depending on the circuit board design.  
FDS6984AS Rev A1 (X)  
Typical Characteristics (continued)  
SyncFET Schottky Body Diode  
Characteristics  
Fairchild’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 22  
shows the reverse recovery characteristic of the  
FDS6984AS.  
Schottky barrier diodes exhibit significant leakage at  
high temperature and high reverse voltage. This will  
increase the power in the device.  
0.01  
125oC  
0.001  
100oC  
0.0001  
0.00001  
25oC  
0.000001  
0
10  
20  
30  
VDS, REVERSE VOLTAGE (V)  
Figure 24. SyncFET body diode reverse  
leakage versus drain-source voltage and  
temperature.  
10nS/DIV  
Figure 22. FDS6984AS SyncFET body  
diode reverse recovery characteristic.  
For comparison purposes, Figure 23 shows the reverse  
recovery characteristics of the body diode of an  
equivalent size MOSFET produced without SyncFET  
(FDS6984A).  
0V  
10nS/DIV  
Figure 23. Non-SyncFET (FDS6984A) body  
diode reverse recovery characteristic.  
FDS6984AS Rev A1 (X)  
TRADEMARKS  
The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global  
subsidianries, and is not intended to be an exhaustive list of all such trademarks.  
ACEx®  
FPS™  
PDP-SPM™  
The Power Franchise®  
Build it Now™  
CorePLUS™  
CorePOWER™  
CROSSVOLT™  
CTL™  
Current Transfer Logic™  
EcoSPARK®  
EfficentMax™  
F-PFS™  
Power-SPM™  
PowerTrench®  
Programmable Active Droop™  
QFET®  
QS™  
Quiet Series™  
RapidConfigure™  
FRFET®  
Global Power ResourceSM  
Green FPS™  
Green FPS™ e-Series™  
GTO™  
TinyBoost™  
TinyBuck™  
TinyLogic®  
TINYOPTO™  
TinyPower™  
IntelliMAX™  
ISOPLANAR™  
MegaBuck™  
MICROCOUPLER™  
MicroFET™  
Saving our world 1mW at a time™ TinyPWM™  
EZSWITCH™ *  
SmartMax™  
SMART START™  
SPM®  
STEALTH™  
SuperFET™  
SuperSOT™-3  
SuperSOT™-6  
SuperSOT™-8  
SuperMOS™  
®
TinyWire™  
µSerDes™  
®
MicroPak™  
Fairchild®  
MillerDrive™  
MotionMax™  
Motion-SPM™  
OPTOLOGIC®  
UHC®  
Ultra FRFET™  
UniFET™  
VCX™  
Fairchild Semiconductor®  
FACT Quiet Series™  
FACT®  
FAST®  
OPTOPLANAR®  
VisualMax™  
®
FastvCore™  
tm  
FlashWriter®  
*
* EZSWITCH™ and FlashWriter® are trademarks of System General Corporation, used under license by Fairchild Semiconductor.  
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FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS  
HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE  
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER  
ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S  
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.  
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR  
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.  
As used herein:  
1. Life support devices or systems are devices or systems which,  
(a) are intended for surgical implant into the body or (b)  
support or sustain life, and (c) whose failure to perform when  
properly used in accordance with instructions for use provided  
in the labeling, can be reasonably expected to result in a  
significant injury of the user.  
2. A critical component in any component of a life support,  
device, or system whose failure to perform can be reasonably  
expected to cause the failure of the life support device or  
system, or to affect its safety or effectiveness.  
PRODUCT STATUS DEFINITIONS  
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FDS6984AS Rev.A1(X)  
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