FDD6680S
December 2000
FDD6680S
30V N-Channel PowerTrench SyncFET™
General Description
The FDD6680S is designed to replace a single MOSFET and Schottky diode in synchronous DC:DC power supplies. This 30V MOSFET is designed to maximize power conversion efficiency, providing a low RDS(ON) and low gate charge. The FDD6680S includes an integrated Schottky diode using Fairchild’s monolithic SyncFET technology. The performance of the FDD6680S as the low-side switch in a synchronous rectifier is indistinguishable from the performance of the FDD6680A in parallel with a Schottky diode.
Features
• 55 A, 30 V RDS(ON) = 11 mΩ @ VGS = 10 V RDS(ON) = 17 mΩ @ VGS = 4.5 V
• Includes SyncFET Schottky body diode • Low gate charge (17nC typical) • High performance trench technology for extremely low RDS(ON) • High power and current handling capability .
Applications
• DC/DC converter • Motor Drives
D
D G S
TO-252
S G
Absolute Maximum Ratings
Symbol
VDSS VGSS ID PD Drain-Source Voltage Gate-Source Voltage Drain Current – Continuous – Pulsed Power Dissipation
TA=25oC unless otherwise noted
Parameter
Ratings
30 ±20
(Note 3) (Note 1a) (Note 1) (Note 1a) (Note 1b)
Units
V V A W
55 100 60 3.1 1.3 –55 to +150
TJ, TSTG
Operating and Storage Junction Temperature Range
°C
Thermal Characteristics
RθJC RθJA RθJA Thermal Resistance, Junction-to-Case Thermal Resistance, Junction-to-Ambient Thermal Resistance, Junction-to-Ambient
(Note 1) (Note 1a) (Note 1b)
2.1 40 96
°C/W °C/W °C/W
Package Marking and Ordering Information
Device Marking FDD6680S Device FDD6680S Reel Size 13’’ Tape width 16mm Quantity 2500 units
2001 Fairchild Semiconductor Corporation
FDD6680S Rev D(W)
FDD6680S
Electrical Characteristics
Symbol
WDSS IAR
TA = 25°C unless otherwise noted
Parameter
Drain-Source Avalanche Energy Drain-Source Avalanche Current
Test Conditions
Single Pulse, VDD = 15 V, ID=14A
Min
Typ
Max Units
245 14 mJ A
Drain-Source Avalanche Ratings (Note 2)
Off Characteristics
BVDSS ∆BVDSS ∆TJ IDSS IGSSF IGSSR Drain–Source Breakdown Voltage Breakdown Voltage Temperature Coefficient Zero Gate Voltage Drain Current Gate–Body Leakage, Forward Gate–Body Leakage, Reverse
(Note 2)
VGS = 0 V, ID = 1 mA ID = 1 mA, Referenced to 25°C VDS = 24 V, VGS = 20 V, VGS = –20 V, VGS = 0 V VDS = 0 V VDS = 0 V
30 19 500 100 –100
V mV/°C µA nA nA
On Characteristics
VGS(th) ∆VGS(th) ∆TJ RDS(on)
Gate Threshold Voltage Gate Threshold Voltage Temperature Coefficient Static Drain–Source On–Resistance On–State Drain Current Forward Transconductance
VDS = VGS, ID = 1 mA ID = 1 mA, Referenced to 25°C VGS = 10 V, ID = 12.5 A ID = 10 A VGS = 4.5 V, VGS= 10 V, ID = 12.5A, TJ= 125°C VGS = 10 V, VDS = 15 V, VDS = 5 V ID = 12.5 A
1
2 –3.3 9.5 13.5 17
3
V mV/°C mΩ
11 17 23
ID(on) gFS
50 27
A S
Dynamic Characteristics
Ciss Coss Crss Input Capacitance Output Capacitance Reverse Transfer Capacitance
(Note 2)
VDS = 15 V, f = 1.0 MHz
V GS = 0 V,
2010 526 186
pF pF pF
Switching Characteristics
td(on) tr td(off) tf Qg Qgs Qgd Turn–On Delay Time Turn–On Rise Time Turn–Off Delay Time Turn–Off Fall Time Total Gate Charge Gate–Source Charge Gate–Drain Charge
VDS = 15 V, VGS = 10 V,
ID = 1 A, RGEN = 6 Ω
10 10 34 14
18 18 55 23 24
ns ns ns ns nC nC nC
VDS = 15 V, VGS = 5 V
ID = 12.5 A,
17 6.2 5.5
Drain–Source Diode Characteristics and Maximum Ratings
IS VSD trr Qrr Maximum Continuous Drain–Source Diode Forward Current Drain–Source Diode Forward Voltage Diode Reverse Recovery Time Diode Reverse Recovery Charge VGS = 0 V, IS = 4.4 A VGS = 0 V, IS = 7 A IF = 12.5A, diF/dt = 300 A/µs
(Note 2) (Note 2)
4.4 0.49 0.56 20 19.7 0.7
A V nS nC
(Note 3)
FDD6680S Rev D (W)
FDD6680S
Electrical Characteristics
TA = 25°C unless otherwise noted
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) RθJA = 40°C/W when mounted on a 1in2 pad of 2 oz copper
b) RθJA = 96°C/W when mounted on a minimum pad.
Scale 1 : 1 on letter size paper 2. Pulse Test: Pulse Width < 300µs, Duty Cycle < 2.0% 3. Maximum current is calculated as:
PD R DS(ON)
where PD is maximum power dissipation at TC = 25°C and RDS(on) is at TJ(max) and VGS = 10V. Package current limitation is 21A
FDD6680S Rev D (W)
FDD6680S
Typical Characteristics
60 5.0V 4.5V 4.0V RDS(ON), NORMALIZED DRAIN-SOURCE ON-RESISTANCE VGS = 10V 50 ID, DRAIN CURRENT (A) 40 30 20 10 0 0 1 2 3 VDS, DRAIN-SOURCE VOLTAGE (V) 7.0V
2 1.8 1.6 1.4 1.2 1 0.8 0 10 20 30 40 50 ID, DRAIN CURRENT (A)
VGS = 4.0V 4.5V 5.0V 6.0V
3.5V
7.0V 8.0V 10V
3.0V
Figure 1. On-Region Characteristics.
Figure 2. On-Resistance Variation with Drain Current and Gate Voltage.
0.04 RDS(ON), ON-RESISTANCE (OHM)
2.6 RDS(ON), NORMALIZED DRAIN-SOURCE ON-RESISTANCE 2.2 1.8 1.4 1 0.6 0.2 -50 -25 0 25 50 75 100
o
ID = 12.5A VGS = 10V
ID = 6.3A 0.03
0.02 TA = 100oC 0.01 TA = 25oC
125
150
0 2 4 6 8 10 VGS, GATE TO SOURCE VOLTAGE (V)
TJ, JUNCTION TEMPERATURE ( C)
Figure 3. On-Resistance Variation with Temperature.
50 VDS = 5V ID, DRAIN CURRENT (A) 40
Figure 4. On-Resistance Variation with Gate-to-Source Voltage.
10 IS, REVERSE DRAIN CURRENT (A)
100oC
TA = -55oC 25oC
VGS = 0V 1
30
0.1
TA = 100oC 25oC
20
0.01
-55oC
10
0 1 2 3 4 5 VGS, GATE TO SOURCE VOLTAGE (V)
0.001 0 0.2 0.4 0.6 0.8 VSD, BODY DIODE FORWARD VOLTAGE (V)
Figure 5. Transfer Characteristics.
Figure 6. Body Diode Forward Voltage Variation with Source Current and Temperature.
FDD6680S Rev D (W)
FDD6680S
Typical Characteristics (continued)
10 VGS, GATE-SOURCE VOLTAGE (V) ID =12.5A 8 15V 6 CAPACITANCE (pF) VDS = 5V 10V
3000 2500 2000 1500 1000 500 0 0 10 20 Qg, GATE CHARGE (nC) 30 40 0 10 20 30 VDS, DRAIN TO SOURCE VOLTAGE (V) COSS CRSS CISS f = 1MHz VGS = 0 V
4
2
0
Figure 7. Gate Charge Characteristics.
60 P(pk), PEAK TRANSIENT POWER (W) 50 40 30 20 10
Figure 8. Capacitance Characteristics.
ID, DRAIN CURRENT (A)
100
RDS(ON) LIMIT 1ms 10ms 100ms 1s 10s VGS = 10V SINGLE PULSE RθJA = 96oC/W TA = 25oC DC
100µs
SINGLE PULSE RθJA = 96°C/W TA = 25°C
1
0.01 0.1 1 10 100 VDS, DRAIN-SOURCE VOLTAGE (V)
0 0.01
0.1
1
10
100
1000
t1, TIME (sec)
Figure 9. Maximum Safe Operating Area.
Figure 10. Single Pulse Maximum Power Dissipation.
r(t), NORMALIZED EFFECTIVE TRANSIENT THERMAL RESISTANCE
1
D = 0.5 0.2
0.1
0.1 0.05 0.02
RθJA(t) = r(t) + RθJA RθJA = 96 °C/W P(pk)
0.01 SINGLE PULSE
t1 t2 TJ - TA = P * RθJA(t) Duty Cycle, D = t1 / t2
0.01
0.001 0.0001
0.001
0.01
0.1 t1, TIME (sec)
1
10
100
1000
Figure 11. Transient Thermal Response Curve.
Thermal characterization performed using the conditions described in Note 1b. Transient thermal response will change depending on the circuit board design.
FDD6680S Rev D (W)
FDD6680S
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 12 shows the reverse recovery characteristic of the FDD6680S. Schottky barrier diodes exhibit significant leakage at high temperature and high reverse voltage. This will increase the power in the device.
IDSS, REVERSE LEAKAGE CURRENT (A) 0.1
0.01
100oC
0.001 25 C
o
Current: 3A/div
0
0.0001 0 10 20 30 VDS, REVERSE VOLTAGE (V)
Figure 14. SyncFET body diode reverse leakage versus drain-source voltage and temperature.
10nS/div
Figure 12. FDD6680S SyncFET body diode reverse recovery characteristic.
For comparison purposes, Figure 13 shows the reverse recovery characteristics of the body diode of an equivalent size MOSFET produced without SyncFET (FDD6680).
Current: 3A/div
0
10nS/div
Figure 13. Non-SyncFET (FDS6680) body diode reverse recovery characteristic.
FDS6680S Rev C (W)
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks.
ACEx™ Bottomless™ CoolFET™ CROSSVOLT™ DOME™ E2CMOSTM EnSignaTM FACT™ FACT Quiet Series™ FAST
DISCLAIMER
FASTr™ GlobalOptoisolator™ GTO™ HiSeC™ ISOPLANAR™ MICROWIRE™ OPTOLOGIC™ OPTOPLANAR™ PACMAN™ POP™
PowerTrench QFET™ QS™ QT Optoelectronics™ Quiet Series™ SILENT SWITCHER SMART START™ SuperSOT™-3 SuperSOT™-6 SuperSOT™-8
SyncFET™ TinyLogic™ UHC™ VCX™
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LIFE SUPPORT POLICY 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 2. A critical component is any component of a life support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design.
Preliminary
First Production
No Identification Needed
Full Production
Obsolete
Not In Production
This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.
Rev. G