Supertex inc.
Low Voltage
Protection Switch
Features
►
Up to ±20V input voltage protection
►
Low on-resistance - 6.5Ω typical
►
Fast switching speed
►
Effectively, a simple two terminal device
►
No external power supplies needed
FP0030
General Description
The Supertex FP0030 is a 20V current limiting protection
device. It is designed to protect Ethernet systems from high
transient voltages.
The FP0030 can be considered as a normally closed switch
with a typical switch resistance of 6.5Ω. The device starts
to turn off when the voltage drop across the two terminals
exceeds a nominal value of ±1.5V. In the off state, the FP0030
can withstand up to ±20V across its terminals. A small amount
of current, typical 800µA is allowed to flow through the device.
The FP0030 can also be used as a resettable fuse to protect
power lines against output short circuit conditions.
The FP0030 is available in a 3-Lead SOT-23 package.
Applications
►
Ethernet system protection
►
Resettable fuse
►
High side switch
►
Data acquisition
Typical Application Circuit
3.3V
3.3V
FP0030
Data
Line 1
3.3V
3.3V
Ethernet
Port
FP0030
Data
Line 2
Doc.# DSFP-FP0030
A072312
Supertex inc.
www.supertex.com
FP0030
Ordering Information
Part Number
FP0030K1-G
Package
3-Lead SOT-23
Packing
3000/Reel
-G indicates package is RoHS compliant (‘Green’)
Absolute Maximum Ratings
Parameter
V
A-B
, Differential voltage drop
Maximum junction temperature
Storage temperature range
Power dissipation, T
A
@25°C
Value
0 to ±22V
+125°C
-65° to +150°C
360mW
1
Pin Configuration
SUB
B
A
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.
Note:
1. Mounted on FR4 board, 25mm x 25mm x 1.57mm.
SOT-23 (K1)
Product Marking
F03W
W = Code for week sealed
= “Green” Packaging
SOT-23 (K1)
Typical Thermal Resistance
Package
3-Lead SOT-23
θ
ja
203
O
C/W
O
Package may or may not include the following marks: Si or
Electrical Characteristics
(T = 25 C unless otherwise specified)
j
Sym
BV
A-B
R
SW
V
TRIP
V
OFF
I
A-B(OFF)
I
PEAK
T
OFF
T
ON
C
SW(ON)
C
SW(OFF)
T
j
Parameter
Differential input voltage range from A to B
Switch ON-resistance from A to B
V
A-B
trip point to turn off
Switch turn off voltage
Switch off current
Peak switching current
Turn off time
Turn on time
Switch ON-capacitance from A to B or B to A
Switch OFF-capacitance from A to B or B to A
Operating junction temperature
Min
±20
-
-
-
-
-
-
-
-
-
-40
Typ
-
6.5
±1.5
±3.2
±800
±155
30
1.0
32
11
-
Max
-
8.5
Units
V
Ω
V
V
µA
mA
ns
µs
pF
pF
O
Conditions
I
A-B
= ±2.0mA
I
A-B
= ±50mA, V
A
or V
B
= 0V
---
I
A-B
= ±1.0mA
V
A-B
= ±15V
---
See Figure 1
See Figure 2
SW = ON
V
SW
= 10V
---
-
-
±1500
-
60
2.0
-
-
+125
C
Doc.# DSFP-FP0030
A072312
2
Supertex inc.
www.supertex.com
FP0030
Block Diagram
A
B
Switch Control
Typical I-V Characteristics
+I
PEAK
I
A-B
I
A-B
= +800µA
+1.0mA
-15V
-V
OFF
-V
TRIP
+V
TRIP
-1.0mA
I
A-B
= -800µA
R
SW
= 6.5Ω
+V
OFF
+15V
-I
PEAK
Doc.# DSFP-FP0030
A072312
3
Supertex inc.
www.supertex.com
FP0030
Functional Description
The Supertex FP0030 can be considered as a normally
closed switch controlled by a switch control (please refer to
the block diagram). The switch control monitors the voltage
drop across terminals A and B. If the voltage difference is
greater than ±1.5V, the switch will start to open. Once in the
open state, only a small amount of current, typical 800µA,
flows through the switch to detect if the high voltage is still
present or not. The switch will not close until the voltage
across terminal A and B drops below ±1.5V.
Test Circuits for T
ON
and T
OFF
+10V
0V
500ns pulse width
10V
A
T
X
A
FP0030
0V
2.0V
B
10
B
10%
T
OFF
Figure 1: T
OFF
Test Circuit
10V
1.0V
+10V
0V
2.0ms pulse width
100
A
0V
1.0V
2.0V
T
X
A
FP0030
B
B
0V
10%
T
ON
Figure 2: T
ON
Test Circuit
Pin Description
Pin Name
A
SUB
B
Description
Switch terminal A
Internally connect to the back of the die. Leave floating.
DO NOT GROUND!
Switch terminal B
Doc.# DSFP-FP0030
A072312
4
Supertex inc.
www.supertex.com
FP0030
3-Lead TO-236AB (SOT-23) Package Outline (K1)
2.90x1.30mm body, 1.12mm height (max), 1.90mm pitch
D
3
E1 E
0.25
Gauge
Plane
1
e
e1
2
b
L
L1
Seating
Plane
Top View
A
View B
View B
A
A2
Seating
Plane
A1
Side View
A
View A - A
Symbol
Dimension
(mm)
MIN
NOM
MAX
A
0.89
-
1.12
A1
0.01
-
0.10
A2
0.88
0.95
1.02
b
0.30
-
0.50
D
2.80
2.90
3.04
E
2.10
-
2.64
E1
1.20
1.30
1.40
e
0.95
BSC
e1
1.90
BSC
L
0.20
†
0.50
0.60
L1
0.54
REF
θ
0
O
-
8
O
JEDEC Registration TO-236, Variation AB, Issue H, Jan. 1999.
† This dimension differs from the JEDEC drawing.
Drawings not to scale.
Supertex Doc.#:
DSPD-3TO236ABK1, Version C041309.
(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.)
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)
©2012
Supertex inc.
All rights reserved. Unauthorized use or reproduction is prohibited.
Doc.# DSFP-FP0030
A072312
5
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com
Supertex inc.
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