SUPERTEX FP0030

Supertex inc.
FP0030
Low Voltage
Protection Switch
Features
►►
►►
►►
►►
►►
General Description
The Supertex FP0030 is a 20V current limiting protection
device. It is designed to protect Ethernet systems from high
transient voltages.
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
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.
Applications
►►
►►
►►
►►
Ethernet system protection
Resettable fuse
High side switch
Data acquisition
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.
Typical Application Circuit
3.3V
3.3V
Data
Line 1
FP0030
3.3V
Ethernet
Port
Doc.# DSFP-FP0030
A072312
3.3V
FP0030
Data
Line 2
Supertex inc.
www.supertex.com
FP0030
Ordering Information
Part Number
Package
Packing
FP0030K1-G
3-Lead SOT-23
3000/Reel
-G indicates package is RoHS compliant (‘Green’)
Pin Configuration
Absolute Maximum Ratings
Parameter
Value
VA-B, Differential voltage drop
SUB
0 to ±22V
Maximum junction temperature
+125°C
Storage temperature range
-65° to +150°C
Power dissipation, [email protected]°C
360mW
B
1
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.
SOT-23 (K1)
Product Marking
Note:
1. Mounted on FR4 board, 25mm x 25mm x 1.57mm.
Package
θja
3-Lead SOT-23
203OC/W
W = Code for week sealed
= “Green” Packaging
F03W
Typical Thermal Resistance
Package may or may not include the following marks: Si or
SOT-23 (K1)
Electrical Characteristics (T = 25 C unless otherwise specified)
j
O
Sym
Parameter
Min
Typ
Max
Units
Conditions
BVA-B
Differential input voltage range from A to B
±20
-
-
V
IA-B = ±2.0mA
RSW
Switch ON-resistance from A to B
-
6.5
8.5
Ω
IA-B = ±50mA, VA or VB = 0V
VTRIP
VA-B trip point to turn off
-
±1.5
-
V
---
VOFF
Switch turn off voltage
-
±3.2
-
V
IA-B = ±1.0mA
Switch off current
-
±800
±1500
µA
VA-B = ±15V
IPEAK
Peak switching current
-
±155
-
mA
---
TOFF
Turn off time
-
30
60
ns
See Figure 1
TON
Turn on time
-
1.0
2.0
µs
See Figure 2
CSW(ON)
Switch ON-capacitance from A to B or B to A
-
32
-
pF
SW = ON
CSW(OFF)
Switch OFF-capacitance from A to B or B to A
-
11
-
pF
VSW = 10V
-40
-
+125
IA-B(OFF)
Tj
Operating junction temperature
Doc.# DSFP-FP0030
A072312
2
C
O
---
Supertex inc.
www.supertex.com
FP0030
Block Diagram
A
B
Switch Control
Typical I-V Characteristics
IA-B
+IPEAK
IA-B = +800µA
+1.0mA
-15V
-VOFF
-VTRIP
+VTRIP
+VOFF
+15V
-1.0mA
IA-B = -800µA
RSW = 6.5Ω
-IPEAK
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 TON and TOFF
+10V
500ns pulse width
10V
A
0V
TX
A
FP0030
0V
2.0V
B
B
10Ω
10%
TOFF
Figure 1: TOFF Test Circuit
10V
1.0V
+10V
0V
100Ω
0V
TX
A
2.0ms pulse width
A
FP0030
2.0V
1.0V
B
B
0V
10%
TON
Figure 2: TON Test Circuit
Pin Description
Pin Name
A
SUB
B
Doc.# DSFP-FP0030
A072312
Description
Switch terminal A
Internally connect to the back of the die. Leave floating. DO NOT GROUND!
Switch terminal B
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
Gauge
Plane
0.25
1
e
b
e1
Seating
Plane
L
L1
2
View B
Top View
View B
A
A
A2
Seating
Plane
A1
Side View
Symbol
Dimension
(mm)
View A - A
A
A
A1
A2
b
D
E
E1
MIN
0.89
0.01
0.88
0.30
2.80
2.10
1.20
NOM
-
-
0.95
-
2.90
-
1.30
MAX
1.12
0.10
1.02
0.50
3.04
2.64
1.40
e
e1
0.95
BSC
1.90
BSC
L
0.20†
0.50
0.60
L1
0.54
REF
θ
0O
8O
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)
Supertex inc.
©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