SLVU2.8Q.TCT - SEMTECH - Datasheet.Directory

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PROTECTION PRODUCTS

SLVU2.8Q

Low Voltage TVS Diode

for Automotive Applications

Description Features

Circuit Diagram Schematic and PIN Configuration

Revision 3/23/2011

Applications

Mechanical Characteristics

JEDEC SOT-23 3L package

Pb-Free, Halogen Free, RoHS/WEEE Compliant

Molding compound flammability rating: UL 94V-0

Marking: Marking Code

Packaging: Tape and Reel

SOT-23 3L (Top View)

Analog Video

Navigation Systems

Touch Panels

The SLVU2.8Q transient voltage suppressor is rated to

Grade 3 of AEC-Q100 for use in automotive applica-

tions. It is specifically designed to protect sensitive

components which are connected to data and trans-

mission lines from overvoltage events. It may be used

to protect one single ended line operating up to 2.8

Volts.

The SLVU2.8Q is constructed using Semtech’s propri-

etary EPD process technology. The EPD process

provides a true low operating voltage of 2.8 Volts for

maximum circuit protection. The SLVU2.8Q features

high ESD capability (+/-25kV contact, +/-30kV air per

IEC 61000-4-2), low clamping voltage, and is rated to

absorb up to 24A for an 8/20us duration pulse. Since

the SLVU2.8Q is constructed using solid-state silicon-

avalanche technology, it will not degrade as long as it is

operated within data sheet parameters.

The SLVU2.8Q is in a 3-lead SOT23 package. The

leads are finished with matte tin. This device is a Pb-

Free, Halogen Free, RoHS/WEEE compliant product.

400 Watts peak pulse power (tp = 8/20μs)

Transient protection for high speed data lines to

IEC 61000-4-2 (ESD) ±30kV (air), ±25kV (contact)

IEC 61000-4-4 (EFT) 40A (5/50ns)

IEC 61000-4-5 (Lightning) 24A (8/20μs)

One device protects one unidirectional line

Qualified to AEC-Q100, Grade 3

Low leakage current

Low operating and clamping voltages

Solid-state silicon-avalanche technology

PROTECTION PRODUCTS

SLVU2.8Q

Absolute Maximum Rating

Electrical Characteristics (T=25oC Unless Otherwise Specified)

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8.2V

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2.3V

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C°52=T,V8.2=

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052.0Aμ

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MWR

C°58=T,V8.2=

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003.0Aμ

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MWR

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3Aμ

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PROTECTION PRODUCTS

SLVU2.8Q

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t,A5=

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t,A42=

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5.21V

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5.8V

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Electrical Characteristics (T=25oC Unless Otherwise Specified) - Con’t

PROTECTION PRODUCTS

SLVU2.8Q

Typical Characteristics

Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve

100

110

0 25 50 75 100 125 150

Ambient Temperatur e - TA (oC)

% of Rated Power or I

Clamping Voltage vs. Peak Pulse Current

(Pin 3 to Pin 1,2)

Pulse Waveform

Normalized Capacitance vs. Reverse Voltage

(T = 25oC)

0.01

0.1

0.1 1 10 100 1000

Pulse Durati o n - tp (µ s)

Peak Pulse Power - Ppk (kW)

0.2

0.4

0.6

0.8

1.2

00.511.522.53

Reverse Vo ltage - VR (V)

CJ (VR) / CJ(VR=0)

Pin 2 to Pin 1

Pin 3 to Pin 1 and 2

100

110

0 5 10 15 20 25 30

Time (us)

Percent of IPP

e-t

td = IPP/2

Waveform

Parameters:

tr = 8µs

td = 20µs

Forward Voltage vs. Forward Current

(Pin 2 to Pin 3)

0 5 10 15 20 25 30

Forward Current - If (A)

Forw ard Voltage - Vf (V)

Waveform

Parameters:

tr = 8s

td = 20s

0 5 10 15 20

Peak Pulse Cu rrent Ipp - (A)

Clamping Voltage Vc - (V)

Waveform

Parameters:

tr = 8us

td = 20us

PROTECTION PRODUCTS

SLVU2.8Q

Typical Characteristics

ESD Clamping (Pin 1, 2 to 3)

(-8kV Contact per IEC 61000-4-2)

ESD Clamping (Pin 3 to 1, 2)

(8kV Contact per IEC 61000-4-2)

Normalized Capacitance vs. Temperature

(Pin 3 to 1, 2)

Punch-Through Voltage vs. Temperature

(Pin 3 to 1, 2)

Reverse Leakage Current vs. Temperature

(Pin 3 to 1, 2)

Normalized Capacitance vs. Temperature

(Pin 2 to 1)

Note: ESD data is taken with a 10x attenuator

0.5

1.5

2.5

-50-30-101030507090

Temp erature ( ºC )

Cj(T) / Cj(T=25oC)

0.2

0.4

0.6

0.8

1.2

-50-30-101030507090

Tempe rature ( ºC )

Cj(T) / Cj(T=25oC)

0.0

1.0

2.0

3.0

4.0

5.0

-50 -30 -10 10 30 50 70 90

Temperature ( ºC )

Punch Through Voltage (VPT) - ( V )

100

1000

10000

0 20406080100

Temperature ( ºC )

Reverse Leakage (IR) ( nA )

PROTECTION PRODUCTS

SLVU2.8Q

Applications Information

Device Connection Options

Electronic equipment is susceptible to transient distur-

bances from a variety of sources including: ESD to an

open connector or interface, direct or nearby lightning

strikes to cables and wires, and charged cables “hot

plugged” into I/O ports. The SLVU2.8Q is designed to

protect sensitive components from damage and latch-

up which may result from such transient events. The

SLVU2.8Q can be configured to protect either one

unidirectional line or two (one line pair) high-speed data

lines. The options for connecting the devices are as

follows:

1. Protection of one unidirectional I/O line: Protec-

tion of one data line is achieved by connecting pin

3 to the protected line, and pins 1 and 2 to ground.

This connection option will allow the device to

operate on lines with positive polarity signal transi-

tions (during normal operation). In this configura-

tion, the device adds a maximum loading capaci-

tance of 100pF. During positive duration tran-

sients, the internal TVS diode will be reversed

biased and will act in the avalanche mode, con-

ducting the transient current from pin 3 to 1. The

transient will be clamped at or below the rated

clamping voltage of the device. For negative

duration transients, the internal steering diode is

forward biased, conducting the transient current

from pin 2 to 3. The transient is clamped below

the rated forward voltage drop of the diode.

2. Low capacitance protection of one differential

line pair: Protection of a high-speed differential line

pair is achieved by connecting two devices in anti-

parallel. Pin 1 of the first device is connected to

line 1 and pin 2 is connected to line 2. Pin 2 of the

second device is connected to line 1 and pin 1 is

connected to line 2 as shown. Pin 3 must be left

open on both devices. During negative duration

transients, the first device will conduct from pin 2

to 1. The steering diode conducts in the forward

direction while the TVS will avalanche and conduct

in the reverse direction. During positive transients,

the second device will conduct in the same man-

ner. In this configuration, the total loading capaci-

tance is the sum of the capacitance (between pins

1 and 2) of each device making this configuration

suitable for high-speed interfaces.

SLVU2.8Q Circuit Diagram

Protection of one unidirectional line

Low capacitance protection of one high-speed line

pair

PROTECTION PRODUCTS

SLVU2.8Q

Analog Video Protection Circuit

VIDEO

ENCODER or

DRIVER

VIDEO IN/OUT

L2.L1

SLVU2.8Q

C1 C2 C3

Analog Video Input Protection

The SLVU2.8Q can be used in conjunction with a PTC

thermistor to protect analog video inputs as shown

below. During an overcurrent condition, the PTC will

heat up and reduce the current to the load to a low

level, protecting downstream components. The reac-

tion time of the PTC depends on several factors that

are not very well controlled. This means that protected

components can potentially be exposed to damaging

overcurrent until there is enough power dissipation to

trigger the PTC. The SLVU2.8Q will protect the down

stream device until the PTC triggers. The figure at the

right shows the typical response of the protection

circuit to an overvoltage event. In addition to protect-

ing the circuit until the PTC triggers, the SLVU2.8Q

serves to protect components during ESD events. The

SLVU2.8Q is capable of withstanding a +/-25kV con-

tact discharge per IEC 61000-4-2.

Input Voltage

Output Voltage

Current through SLVU2.8Q

Protection circuit response to an overvoltage event

PROTECTION PRODUCTS

SLVU2.8Q

Outline Drawing - SO-8

Land Pattern -SOT23 3L

Outline Drawing -SOT23 3L

E1 E

bxN

A3X

bbb C A B

SEATING PLANE

aaa C

1.401.20

N3 3

0-8°0°8°0° -

.055.047

bbb .008 0.20

aaa .004 0.10

INCHES

.114

c.012

.003

.082

DIM

AMIN

.000

.035

0.51

0.18

2.64

0.30

0.08

2.10

.022

.075

.093

.020

.007

.104

(0.55)

1.90 BSC

2.37

2.90

MILLIMETERS

MAX

0.10

1.12

MIN

DIMENSIONS

0.01

MAXNOM

-.004

.044 NOM

0.89 -

3.042.80.110 .120

e1 .037 0.95 BSC

L .015 .020 0.500.40.024 0.60

A2 .035 .037 0.950.88.040 1.02

E1 .051 1.30

SEE DETAIL A

SIDE VIEW

DATUMS AND TO BE DETERMINED AT DATUM PLANE

-A- -B-

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

NOTES:

OR GATE BURRS.

DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS

-H-

DETAIL A

0.25

SEATING

PLANE

GAUGE

PLANE 0c

REFERENCE IPC-SM-782A.2.

E .037 0.95

E1 .075 1.90

NOTES:

1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY

CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR

COMPANY'S MANUFACTURING GUIDELINES ARE MET.

DIM

CMILLIMETERSINCHES (2.20)

.055

.141

.039

.031

(.087)

1.40

3.60

1.00

0.80

DIMENSIONS

PROTECTION PRODUCTS

SLVU2.8Q

YW = 2 - Alphanumeric characters for Date Code

U2.8

Contact Information

Semtech Corporation

Protection Products Division

200 Flynn Road, Camarillo, CA 93012

Phone: (805)498-2111 FAX (805)498-3804

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TCT.Q8.2UVLS000,3hcnI7

Marking Codes Ordering Information

Tape and Reel Specification

epaT

htdiW )xaM(,BD1DE F

)XAM( P0P2P)XAM(TW

mm8 mm2.4

)561.(

mm1.0+5.1

mm0.0-

mm0.1

50.0±

01.±057.1

mm 50.0±5.3

mm mm4.2 1.0±0

1.0±0.4

50.0±0.2

mm mm4.0

mm0.8

mm3.0+

mm1.0-

0A0B0K

mm50.0-/+32.3mm50.0-/+71.3mm50.0-/+73.1

User Direction of feed

Pin 1 Location

U2.8 U2.8 U2.8