Supertex inc.
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
DN2450
Features
►High input impedance
►Low input capacitance
►Fast switching speeds
►Low on-resistance
►Free from secondary breakdown
►Low input and output leakage
Applications
►Normally-on switches
►Battery operated systems
►Voltage to current converters
►Constant current sources
►Current limiters
►Voltage limiters
General Description
These low threshold depletion-mode (normally-on) transistors
utilize an advanced vertical DMOS structure and Supertex’s well-
proven silicon-gate manufacturing process. This combination
produces devices with the power handling capabilities of bipolar
transistors and with the high input impedance and positive
temperature coefcient inherent in MOS devices. Characteristic of
all MOS structures, these devices are free from thermal runaway
and thermally-induced secondary breakdown.
Supertex’s vertical DMOS FETs are ideally suited to a wide range
of switching and amplifying applications where very low threshold
voltage, high breakdown voltage, high input impedance, low input
capacitance, and fast switching speeds are desired.
Absolute Maximum Ratings
Parameter Value
Drain-to-source voltage BVDSX
Drain-to-gate voltage BVDGX
Gate-to-source voltage ±20V
Operating and storage
temperature -55OC to +150OC
Maximum junction temperature 150OC
Absolute Maximum Ratings are those values beyond which damage to the device
may occur. Functional operation under these conditions is not implied. Continuous
operation of the device at the absolute rating level may affect device reliability. All
voltages are referenced to device ground.
Ordering Information
Device Package Options BVDSX/BVDGX
(V)
RDS(ON)
(max)
(Ω)
IDSS
(min)
(mA)
TO-252 (D-PAK) SOT-89
DN2450 DN2450K4-G DN2450N8-G 500 10 700
-G indicates package is RoHS compliant (‘Green’)
N-Channel Depletion-Mode
Vertical DMOS FETs
Pin Congurations
TO-243AA (SOT-89) (N8)
TO-252 (D-PAK) (K4)
TO-243AA (SOT-89) (N8)
TO-252 (D-PAK) (K4)
DN4EW W = Code for week sealed
= “Green” Packaging
Product Marking
Package may or may not include the following marks: Si or
Package may or may not include the following marks: Si or
YY = Year Sealed
WW = Week Sealed
L = Lot Number
= “Green” Packaging
Si YYWW
DN2450
LLLLLLL
GATE
SOURCE
DRAIN
DRAIN
GATE
SOURCE
DRAIN
2
DN2450
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
90%
10%
90% 90%
10%
10%
Pulse
Generator
VDD
R
L
Output
D.U.T.
t
(ON)
t
d(ON)
t
(OFF)
t
d(OFF)
t
f
t
r
Input
INPUT
OUTPUT
0V
V
DD
R
GEN
0V
-10V
Electrical Characteristics (TA = 25OC unless otherwise specied)
Sym Parameter Min Typ Max Units Conditions
BVDSX Drain-to-source breakdown voltage 500 - - V VGS = -5.0V, ID = 100µA
VGS(OFF) Gate-to-source off voltage -1.5 - -3.5 V VDS = 25V, ID = 10µA
ΔVGS(OFF) Change in VGS(OFF) with temperature - - -4.5 mV/OC VDS = 25V, ID = 10µA
IGSS Gate body leakage‡- - 100 nA VGS = ±20V, VDS = 0V
ID(OFF) Drain-to-source leakage current
- - 1.0 µA VDS = Max rating, VGS = -10V
- - 1.0 mA VDS = 0.8 Max Rating,
VGS = -10V, TA = 125OC
IDSS Saturated drain-to-source current 700 - - mA VGS = 0V, VDS = 25V
RDS(ON)
Static drain-to-source on-state
resistance - 7.0 10 ΩVGS = 0V, ID = 300mA
ΔRDS(ON) Change in RDS(ON) with temperature - - 1.1 %/OC VGS = 0V, ID = 300mA
GFS Forward transconductance 500 - - mmho VDS = 10V, ID = 300mA
CISS Input capacitance - 150 200
pF
VGS = -10V,
VDS = 25V,
f = 1MHz
COSS Common source output capacitance - 40 55
CRSS Reverse transfer capacitance - 15 25
td(ON) Turn-on delay time - - 15
ns
VDD = 25V,
ID = 300mA,
RGEN = 25Ω,
trRise time - - 20
td(OFF) Turn-off delay time - - 15
tfFall time - - 15
VSD Diode forward voltage drop - - 1.8 V VGS = -5.0V, ISD = 300mA
trr Reverse recovery time - 800 - ns VGS = -5.10V, ISD = 300mA
Notes:
1. All D.C. parameters 100% tested at 25OC unless otherwise stated. (Pulse test: 300µs pulse, 2% duty cycle.)
2. All A.C. parameters sample tested.
Thermal Characteristics
Package
ID
(continuous)†
(A)
ID
(pulsed)
(A)
Power Dissipation
@TA = 25OC
(W)
θjc
(OC/W)
θja
(OC/W)
IDR
†
(A)
IDRM
(A)
TO-252 0.35 1.0 2.5‡6.25 50‡0.35 1.0
TO-243AA 0.23 0.9 1.6‡15 78 0.23 0.9
Notes:
† ID (continuous) is limited by max rated Tj.
‡ Mounted on FR4 board, 25mm x 25mm x 1.57mm.
Switching Waveforms and Test Circuit
3
DN2450
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
3-Lead TO-252 (D-PAK) Package Outline (K4)
Note:
1. Although 4 terminal locations are shown, only 3 are functional. Lead number 2 was removed.
123
4
L4 L5
b
b2
e
D1
E1
L1
L
Seating
Plane
A1
Gauge
Plane
θ
D
E
View B
Front View Side View
Rear View
View B
θ1
H
c2
A
L3
L2
b3
Note 1
Symbol A A1 b b2 b3 c2 D D1 E E1 e H L L1 L2 L3 L4 L5 θθ1
Dimen-
sion
(inches)
MIN .086 .000* .025 .030 .195 .018 .235 .205 .250 .170
.090
BSC
.370 .055
.108
REF
.020
BSC
.035 .025* .035†0O0O
NOM - - - - - - .240 - - - - .060 - - - - -
MAX .094 .005 .035 .045 .215 .035 .245 .217* .265 .200* .410 .070 .050 .040 .060 10O15O
JEDEC Registration TO-252, Variation AA, Issue E, June 2004.
* This dimension is not specied in the JEDEC drawing.
† This dimension differs from the JEDEC drawing.
Drawings not to scale.
Supertex Doc. #: DSPD-3TO252K4, Version F040910.
Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives
an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability
to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and
specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com)
©2011 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited.
Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA
94089
Tel: 408-222-8888
www
.supertex.com
4
(The package drawing(s) in this data sheet may not reect the most current specications. For the latest package outline
information go to http://www.supertex.com/packaging.html.)
DN2450
Doc.# DSFP-DN2450
A020811
3-Lead TO-243AA (SOT-89) Package Outline (N8)
Symbol A b b1 C D D1 E E1 e e1 H L
Dimensions
(mm)
MIN 1.40 0.44 0.36 0.35 4.40 1.62 2.29 2.00†
1.50
BSC
3.00
BSC
3.94 0.73†
NOM-------- --
MAX 1.60 0.56 0.48 0.44 4.60 1.83 2.60 2.29 4.25 1.20
JEDEC Registration TO-243, Variation AA, Issue C, July 1986.
† This dimension differs from the JEDEC drawing
Drawings not to scale.
Supertex Doc. #: DSPD-3TO243AAN8, Version F111010.
bb1
D
D1
EHE1
C
A
12 3
e
e1
Top View Side View
L
