1
12/13/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
LND250
Advanced DMOS Technology
The LND2 is a high voltage N-channel depletion mode (normally-
on) transistor utilizing Supertex's lateral DMOS technology. The
gate is ESD protected.
The LND2 is ideal for high voltage applications in the areas of
normally-on switches, precision constant current sources, volt-
age ramp generation and amplification.
Ordering Information
BV
DSX
/
R
DS(ON)
I
DSS
BV
DGX
(max)
(min)
TO-236AB*
500V
1.0K
1.0mA
LND250K1
Order Number / Package
N-Channel Depletion-Mode
MOSFET
Features
ESD gate protection
Free from secondary breakdown
Low power drive requirement
Ease of paralleling
Excellent thermal stability
Integral source-drain diode
High input impedance and low C
ISS
Applications
Solid state relays
Normally-on switches
Converters
Power supply circuits
Constant current sources
Input protection circuits
Absolute Maximum Ratings
Drain-to-Source Voltage
BV
DSX
Drain-to-Gate Voltage
BV
DGX
Gate-to-Source Voltage
20V
Operating and Storage Temperature
-55C to +150C
Soldering Temperature*
300C
*
Distance of 1.6 mm from case for 10 seconds.
Product marking for SOT-23:
NDE
where
= 2-week alpha date code
Package Options
TO-236AB
(SOT-23)
top view
*Same as SOT-23. All units shipped on 3,000 piece carrier tape reels.
Source
Gate
Drain
Note: See Package Outline section for dimensions.
2
1235 Bordeaux Drive, Sunnyvale, CA 94089
TEL: (408) 744-0100 FAX: (408) 222-4895
www.supertex.com
12/13/010
2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
90%
10%
90%
90%
10%
10%
PULSE
GENERATOR
V
DD
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
Symbol
Parameter
Min
Typ
Max
Unit
Conditions
BV
DSX
Drain-to-Source Breakdown Voltage
500
V
V
GS
= -10V, I
D
= 1.0mA
V
GS(OFF)
Gate-to-Source OFF Voltage
-1.0
-3.0
V
V
DS
= 25V, I
D
= 100nA
V
GS(OFF)
Change in V
GS(OFF)
with Temperature
5.0
mV/C
V
DS
= 25V, I
D
= 100nA
I
GSS
Gate Body Leakage Current
100
nA
V
GS
= 20V, V
DS
= 0V
I
D(OFF)
Drain-to-Source Leakage Current
100
nA
V
GS
= -10V, V
DS
= 450V
100
A
V
GS
= -10V, V
DS
= 0.8V max rating
T
A
=125C
I
DSS
Saturated Drain-to-Source Current
1.0
3.0
mA
V
GS
= 0V, V
DS
= 25V
R
DS(ON)
Static Drain-to-Source ON-State Resistance
850
1K
V
GS
= 0V, I
D
= 0.5mA
R
DS(ON)
Change in R
DS(ON)
with Temperature
1.2
%/C
V
GS
= 0V, I
D
= 0.5mA
G
FS
Forward Transconductance
1.0
2.0
m
V
GS
= 0V, I
D
= 1.0mA
C
ISS
Input Capacitance
7.5
10
V
GS
= -10V, V
DS
= 25V
C
OSS
Output Capacitance
2.0
3.5
pF
f = 1MHz
C
RSS
Reverse Transfer Capacitance
0.5
1.0
t
d(ON)
Turn-ON Delay Time
0.09
V
DD
= 25V, I
D
= 1.0mA,
tr
Rise Time
0.45
R
GEN
= 25
t
d(OFF)
Turn-OFF Delay Time
0.1
t
f
Fall Time
1.3
V
SD
Diode Forward Voltage Drop
0.9
V
V
GS
= -10V, I
SD
= 1.0mA
t
rr
Reverse Recovery Time
200
ns
V
GS
= -10V, I
SD
= 1.0mA
Notes:
1. All D.C. parameters 100% tested at 25C unless otherwise stated. (Pulse test: 300s pulse, 2% duty cycle.)
2.
All A.C. parameters sample tested.
Thermal Characteristics
Package
I
D
(continuous)*
I
D
(pulsed)
Power Dissipation
jc
ja
I
DR
I
DRM
*
@T
A
= 25
C
C/W
C/W
TO-236AB
13mA
30mA
0.36W
200
350
13mA
30mA
* I
D
(continuous) is limited by max rated T
f
.
Electrical Characteristics
(@ 25C unless otherwise specified)
s
Switching Waveforms and Test Circuit
LND250
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