Supertex inc.
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
DN3545
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
Solid state relays
Converters
Linear amplifiers
Constant current sources
Power supply circuits
Telecom
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General Description
These 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 coefficient 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
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
Soldering temperature* 300OC
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.
* Distance of 1.6mm from case for 10 seconds.
Ordering Information
Device Package Options BVDSX/BVDGX
(V)
RDS(ON)
(max)
(Ω)
IDSS
(min)
(mA)
TO-92 TO-243AA (SOT-89)
DN3545 DN3545N3-G DN3545N8-G 450 20 200
-G indicates package is RoHS compliant (‘Green’)
N-Channel Depletion-Mode
Vertical DMOS FET
Product Marking
YY = Year Sealed
WW = Week Sealed
= “Green” Packaging
SiDN
3545
YYWW
DN5MW W = Code for week sealed
= “Green” Packaging
TO-92 (N3) TO-243AA (SOT-89) (N8)
GATE
SOURCE
DRAIN
GATE
SOURCE
DRAIN
DRAIN
TO-92 (N3)
TO-243AA (SOT-89) (N8)
Pin Configurations
Package may or may not include the following marks: Si or
Package may or may not include the following marks: Si or
2
DN3545
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
Notes:
† ID (continuous) is limited by max rated Tj.
‡ Mounted on FR4 board, 25mm x 25mm x 1.57mm.
Switching Waveforms and Test Circuit
Thermal Characteristics
Package
ID
(continuous)†
(mA)
ID
(pulsed)
(mA)
Power Dissipation
@TA = 25OC
(W)
θjc
(OC/W)
θja
(OC/W)
IDR
†
(mA)
IDRM
(mA)
T0-92 136 1600 0.74 125 170 136 1600
TO-243AA 200 300 1.6‡15 78‡200 300
Electrical Characteristics (TA = 25OC unless otherwise specified)
Sym Parameter Min Typ Max Units Conditions
BVDSX Drain-to-source breakdown voltage 450 - - 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 current - - 100 nA VGS = ± 20V, VDS = 0V
ID(OFF) drain-to-source leakage current
- - 1.0 µA VGS = -5.0V, VDS = Max Rating
- - 1.0 mA VGS = -5.0V, VDS = 0.8Max Rating
TA = 125°C
IDSS Saturated drain-to-source current 200 - - mA VGS = 0V, VDS = 15V
RDS(ON) Static drain-to-source on-state resistance - - 20 Ω VGS = 0V, ID = 150mA
ΔRDS(ON) Change in RDS(ON) with temperature - - 1.1 %/OC VGS = 0V, ID = 150mA
GFS Forward transductance 150 - - mmho ID = 100mA, VDS = 10V
CISS Input capacitance - - 360
pF VGS = -5.0V, VDS = 25V,
f = 1.0MHz
COSS Common source output capacitance - - 40
CRSS Reverse transfer capacitance - - 15
td(ON) Turn-on delay time - - 20
ns VDD = 25V, ID = 150mA,
RGEN = 25Ω,VGS = 0V to -10V
trRise time - - 30
td(OFF) Turn-off delay time - - 30
tfFall time - - 40
VSD Diode forward voltage drop - - 1.8 V VGS = -5.0V, ISD = 150mA
trr Reverse recovery time - 800 - ns VGS = -5.0V, ISD = 150mA
Notes:
All D.C. parameters 100% tested at 25OC unless otherwise stated. (Pulse test: 300µs pulse, 2% duty cycle.)
All A.C. parameters sample tested.
1.
2.
90%
10%
90% 90%
10%
10%
Pulse
Generator
VDD
RL
OUTPUT
D.U.T
.
t(ON)
td(ON)
t(OFF)
td(OFF) tf
tr
INPUT
INPUT
OUTPUT
0V
VDD
RGEN
0V
-10V
3
DN3545
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
Typical Performance Curves
ID (amperes)
VDS (volts)
VGS = +2.0V
Output Characteristics
-0.5V
-0.8V
-1.0V
-1.5V
Saturation Characteristics
ID (amperes)
VDS (volts)
VGS = +2V
+1.0V
0V
-0.5V
-0.8V
-1.0V
GFS (siemens)
ID (amperes)
Transconductance vs. Drain Current Power Dissipation vs. Ambient Temperature
PD (watts)
TA (OC)
0V
-1.5V
0 50 100 150 200 250 300 350 400 450
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1.0V
0246810
0
0.1
0.2
0.3
0.4
0.5
0.6
0 0.1 0.2 0.3 0.4
0
0.2
0.4
0.6
0.8
VDS = 10V
TA = -55OC
TA = 25OC
TA = 125OC
0 25 50 75 100 125 150
0
0.5
1.0
1.5
2.0
TO-243AA
TO-92
Maximum Rated Safe Operating Area
ID (amperes)
VDS (volts)
1 100010010
TO-243AA (Pulsed)
TA = 25OC
0.001
0.01
0.1
1.0
TO-243AA (DC)
TO-92 (DC)
TO-92 (Pulsed)
Thermal Response Characteristics
Thermal Resistance (normalized)
tP (seconds)
1.0
0.8
0.6
0.4
0.2
0
0.001 100.01 0.1 1
TO-243AA
TA = 25OC
PD = 1.6W
TO-92
TC = 25OC
PD = 1.0W
4
DN3545
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
Typical Performance Curves (cont.)
RDS(ON) (ohms)
ID (Amperes)
On Resistance vs. Drain Current
VGS(OFF) and RDS(ON) w/ Temperature
VGS(OFF) (normalized)
TJ (OC)
RDS(ON) (normalized)
Transfer Characteristics
ID (Amperes)
VGS (Volts)
VGS (volts)
-50 0 50 100 150
0.8
0.9
1.0
1.1
1.2
ID = 100µA
VGS = -5.0V
-3 -2 -1 0 1 2
0
0.2
0.4
0.6
0.8
1.0
VDS = 10V
TA = -55OC
TA = 125OC
TA = 25OC
0.5
0.7
0.9
1.1
1.3
1.5
0.4
0.8
1.2
1.6
2.0
2.4
-50 0 50 100 150
RDS(ON) @ 0V, 150mA
VGS(OFF) @ 10µA
0 10 20 30 40
0
50
100
150
200
250
300
CRSS
COSS
CISS
VGS = -5.0V
0123456
-5
-4
-3
-2
-1
0
1
2
3
BVDSS (Normalized)
Tj (OC)
BVDSS Variation with Temperature
Capacitance vs. Drain Source Voltage
C (picofarads)
VDS (Volts)
0 0.2 0.4 0.6 0.8
0
10
20
30
40
50
Gate Drive Dynamic Characteristics
QG (nanocoulombs)
VGS = 0V
ID = 150mA
VDS = 30V
5
DN3545
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
3-Lead TO-92 Package Outline (N3)
Symbol A b c D E E1 e e1 L
Dimensions
(inches)
MIN .170 .014†.014†.175 .125 .080 .095 .045 .500
NOM - - - - - - - - -
MAX .210 .022†.022†.205 .165 .105 .105 .055 .610*
JEDEC Registration TO-92.
* This dimension is not specified in the JEDEC drawing.
† This dimension differs from the JEDEC drawing.
Drawings not to scale.
Supertex Doc.#: DSPD-3TO92N3, Version E041009.
Seating
Plane
1
2
3
Front View Side View
Bottom View
E1 E
D
e1
L
e
c
1 2 3
b
A
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)
©2010 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
6
DN3545
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline
information go to http://www.supertex.com/packaging.html.)
Doc.# DSFP-DN3545
B052009
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 0.89
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 E051509.
bb1
D
D1
EHE1
C
A
1 2 3
e
e1
Top View Side View
L
