Low inductance packaging shortens rise/fall times, resulting in
lower switching losses
MOSFET integration enables optimum layout for lower circuit
inductance and reduced switch node ringing
RoHS Compliant
= 5.0 mΩ at VGS = 10 V, ID = 17.5 A
DS(on)
= 5.7 mΩ at VGS = 4.5 V, ID = 16 A
DS(on)
= 1.8 mΩ at VGS = 10 V, ID = 30 A
DS(on)
= 2.2 mΩ at VGS = 4.5 V, ID = 27 A
DS(on)
General Description
This device includes two specialized N-Channel 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.
Applications
Computing
Communications
General Purpose Point of Load
Notebook VCORE
®
Power Stage
MOSFET Maximum RatingsT
SymbolParameterQ1Q2Units
V
DS
V
GS
I
D
E
AS
P
D
TJ, T
STG
Drain to Source Voltage2525V
Gate to Source Voltage (Note 4)±12±12V
Drain Current -Continuous (Package limited) TC = 25 °C3060
-Pulsed70120
Single Pulse Avalanche Energy (Note 3)2986mJ
Power Dissipation for Single Operation TA = 25 °C2.2
Power Dissipation for Single Operation T
Operating and Storage Junction Temperature Range-55 to +150°C
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 27 shows the reverse recovery
characteristic of the FDMS3624S.
Figure 27. FDMS3624S SyncFET body
diode reverse recovery characteristic
Schottky barrier diodes exhibit significant leakage at high temperature and high reverse voltage. This will increase the power
in the device.
Figure 28. SyncFET body diode reverse
leakage versus drain-source voltage
The following includes registered and unregistered trademar ks and service marks, owned by Fair child Semicondu ctor and/or its glo bal subsidiaries, and is no t
intended to be an exhaustive list of all such trademarks.
2Cool™
AccuPower™
Auto-SPM™
AX-CAP™*
®
BitSiC
Build it Now™
CorePLUS™
CorePOWER™
CROSSVOLT™
CTL™
Current Transfer Logic™
DEUXPEED
Dual Cool™
EcoSPARK
EfficentMax™
*Trademarks of System General Corporation, used under license by Fairchild Semiconductor.
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PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet IdentificationProduct StatusDefinition
Advance InformationFormative / In Design
PreliminaryFirst Production
No Identification NeededFull Production
ObsoleteNot In Production
Datasheet contains the design specifications for product development. Specifications
may change in any manner without notice.
Datasheet contains preliminary data; supplementary data will be published at a later
date. Fairchild Semiconductor reserves the right to make changes at any time without
notice to improve design.
Datasheet contains final specifications. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve the design.
Datasheet contains specifications on a product that is discontinued by Fairchild
Semiconductor. The datasheet is for reference information only.