Datasheet SD05CTC, SD05CTG, SD12CTC, SD12CTG, SD15CTC Datasheet (Semtech Corporation)

SD05C THRU SD24C

Single Line TVS Diode for ESD

Protection in Portable Electronics

PROTECTION PRODUCTS

PROTECTION PRODUCTS

Description

The SDxxC TVS diodes are designed to replace multi­layer varistors (MLVs) in portable applications such as
cell phones, notebook computers, and PDAs. They
offer superior electrical characteristics such as lower
clamping voltage and no device degradation when
compared to MLVs. The SDxxC series TVS diodes are
designed to protect sensitive semiconductor compo­nents from damage or upset due to electrostatic
discharge (ESD) and other voltage induced transient
events.

The SDxxC is in a SOD-323 package and will protect
one bidirectional line. They are available with working
voltages of 5 - 24 volts. These devices will fit on the
same PCB pad area as an 0805 MLV device. They give
the designer the flexibility to protect one line in applica­tions where arrays are not practical. Additionally, it
may be sprinkled around the board in applications
where board space is at a premium.

They may may be used to meet the ESD immunity
requirements of IEC 61000-4-2, Level 4 (15kV air, 8kV
contact discharge).

PRELIMINARY

Features

u 350 Watts peak pulse power (tp = 8/20µs)
u Transient protection for data lines to

IEC 61000-4-2 (ESD) 15kV (air), 8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 24A (8/20µs)

u Small package for use in portable electronics
u Suitable replacement for MLVs in ESD protection

applications

u Protects one I/O or power line
u Low clamping voltage
u Working voltages: 5V, 12V, 15V, 24V
u Low leakage current
u Solid-state silicon avalanche technology

Mechanical Characteristics

u EIAJ SOD-323 package
u Molding compound flammability rating: UL 94V-0
u Marking : Marking code
u Packaging : Tape and Reel per EIA 481

Applications

u Cell Phone Handsets and Accessories
u Microprocessor based equipment
u Personal Digital Assistants (PDAs)
u Notebooks, Desktops, & Servers
u Portable Instrumentation
u Pagers
u Peripherals

Revision 9/2000

Schematic & PIN Configuration

12

SOD-323 (Top View)

1

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PROTECTION PRODUCTS

Absolute Maximum Rating

SD05C THRU SD24C

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)sµ02/8=pt(rewoPesluPkaePP

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Electrical Characteristics

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MWR

I

RB

R

C

V

MWR

I

PP

Am1=6 V

t

C°52=T,V5=01Aµ

PP

PP

L

J

GTS

sµ02/8=pt,A5=8.9V

053sttaW

42A

03Vk

).ces01(062C°

521+ot55-C°

051+ot55-C°

5V

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C

j

I

PP

V

R

sµ02/8=pt,A42=5.41V

zHM1=f,V0=002Fp

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MWR

I

RB

R

C

C

j

V

MWR

I

PP

I

PP

V

R

Am1=3.31V

t

C°52=T,V21=1Aµ

sµ02/8=pt,A5=91V

sµ02/8=pt,A51=42V

zHM1=f,V0=001Fp

21V

2ã 2000 Semtech Corp.

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SD05C THRU SD24C

PROTECTION PRODUCTS

Electrical Characteristics (Continued)

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seniLV42rofSVTC42DS

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MWR

RB

R

C

C

j

MWR

I

PRELIMINARY

51V

I

Am1=7.61V

t

V

MWR

I

PP

PP

V

R

C°52=T,V51=1Aµ

sµ02/8=pt,A5=42V

sµ02/8=pt,A21=92V

zHM1=f,V0=57Fp

42V

egatloVnwodkaerBesreveRV

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egatloVgnipmalCV

egatloVgnipmalCV

ecnaticapaCnoitcnuJC

RB

R

C

C

j

I

Am1=7.62V

t

V

MWR

I

PP

I

PP

V

R

C°52=T,V42=1Aµ

sµ02/8=pt,A5=04V

sµ02/8=pt,A8=44V

zHM1=f,V0=05Fp

ã 2000 Semtech Corp.

3

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SD05C THRU SD24C

PROTECTION PRODUCTS

Typical Characteristics

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

10

110
100

(kW)

PP

1

0.1

Peak Pulse Power - P

0.01

0.1 1 10 100 1000

Pulse Duration - tp (µs)

90

PP

80
70
60
50
40
30

% of Rated Power or I

20
10

0

0 25 50 75 100 125 150

Ambient T em p er at u re - T

A

(oC)

Pulse Waveform

110
100

90
80
70

PP

60
50
40

Percent of I

30
20
10

0

0 5 10 15 20 25 30

-t

e

Time (µs)

td = IPP/2

Waveform

Parameters:

tr = 8µs

td = 20µs

Clamping Voltage vs. Peak Pulse Current

30

Waveform

Parameters:

25

tr = 8µs

td = 20µs

20

15

10

Clamping Voltage - Vc (V)

5

0

0 5 10 15 20 25 30

Peak Pulse Current -Ipp (A)

SD12C

SD05C

4ã 2000 Semtech Corp.

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SD05C THRU SD24C

PROTECTION PRODUCTS

Applications Information

Device Connection Options

The SDxxC TVS diodes are designed to protect one
data, I/O, or power supply line. The device is designed
to replace multi-layer varistors (MLVs) in portable
applications. It is easily implemented on existing 0805
MLV pads and is only slightly larger than 0603 MLV
pads. The device is bidirectional and may be used on
lines where the signal polarity is above and below
ground. The device is symmetrical, so there is no
cathode band.

Circuit Board Layout Recommendations for Suppres­sion of ESD.

Good circuit board layout is critical for the suppression
of fast rise-time transients such as ESD. The following
guidelines are recommended (Refer to application note
SI99-01 for more detailed information):

l Place the TVS near the input terminals or

connectors to restrict transient coupling.

l Minimize the path length between the TVS and

the protected line.

l The ESD transient return path to ground should

be kept as short as possible.

l Place a TVS & decoupling capacitor between

power and ground of components that may be
vulnerable to electrostatic discharges to the
ground plane.

l Minimize all conductive loops including power

and ground loops.

l Use multilayer boards when possible.
l Minimize interconnecting line lengths
l Never run critical signals near board edges.
l Fill unused portions of the PCB with ground

plane.

PRELIMINARY

Device Schematic & Pin Configuration

Size Comparison to 0805 MLV

SOD-323 0805 MLV
Note: Nominal dimensions in inches

Component Placement Comparison

ã 2000 Semtech Corp.

0805 MLV on SOD-323 on 0805

MLV Pad

5

SOD-323 on Recommended
(SOD-323) Solder Pad0805 Solder Pad

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PROTECTION PRODUCTS

Outline Drawing - SOD-323

SD05C THRU SD24C

Land Pattern - SOD-323

6ã 2000 Semtech Corp.

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SD05C THRU SD24C

PROTECTION PRODUCTS

Marking Codes

rebmuNtraP

C50DS5/5

C21DS6/6

C51DS7/7

C42DS8/8

gnikraM

edoC

Ordering Information

traP

rebmuN

CT.C50DSV5000,37

GT.C50DSV5000,0131

CT.C21DSV21000,37

gnikroW

egatloV

PRELIMINARY

repytQ

leeR

eziSleeR

GT.C21DSV21000,0131

CT.C51DSV51000,37

GT.C51DSV51000,0131

CT.C42DSV42000,37

GT.C42DSV42000,0131

Contact Information

ã 2000 Semtech Corp.

Semtech Corporation

Protection Products Division

652 Mitchell Rd., Newbury Park, CA 91320

Phone: [phone] FAX [phone]

7

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