STPS340UY - STMicroelectronics

This is information on a product in full production.

October 2012 Doc ID 17390 Rev 1 1/8

STPS340-Y

Automotive power Schottky rectifier

Datasheet  production data

Features

■Very small conduction losses

■Negligible switching losses

■Low forward voltage drop

■Low thermal resistance

■Extremely fast switching

■Surface mounted device

■Avalanche capability specified

■AEC-Q101 qualified

Description

This single chip Schottky rectifier is suited for

switch mode power supplies and high frequency

DC to DC converters.

Packaged in SMB, and SMC, this device is

intended for use in low and medium voltage

operation, high frequency inverters, free wheeling

and polarity protection applications where low

switching losses are required for automotive

applications.

Table 1. Device summary

IF(AV) 3 A

VRRM 40 V

Tj (max) 150 °C

VF (max) 0.57 V

SMB

STPS340UY

SMC

STPS340SY

www.st.com

Characteristics STPS340-Y

2/8 Doc ID 17390 Rev 1

1 Characteristics

Table 2. Absolute ratings (limiting values)

Symbol Parameter Value Unit

VRRM Repetitive peak reverse voltage 40 V

IF(RMS) Forward rms current 6 A

IF(AV) Average forward current SMB TL = 95 °C  = 0.5 3 A

SMC TL = 105 °C  = 0.5 3 A

IFSM Surge non repetitive forward current tp =10 ms sinusoidal 75 A

PARM Repetitive peak avalanche power tp = 1 µs Tj = 25 °C 1300 W

Tstg Storage temperature range -65 to + 150 °C

TjOperating junction temperature (1) range

1. condition to avoid thermal runaway for a diode on its own heatsink

-40 to +150 °C

Table 3. Thermal resistance

Symbol Parameter Value Unit

Rth(j-l) Junction to lead SMB 25 °C/W

SMC 20

Table 4. Static electrical characteristics

Symbol Parameter Test conditions Min. Typ. Max. Unit

IR(1)

1. Pulse test: tp = 380 µs,  < 2%

To evaluate the conduction losses use the following equation:

P = 0.42 x IF(AV) + 0.050 IF2(RMS)

Reverse leakage

current

Tj = 25 °C VR = VRRM

20 µA

Tj = 125 °C 2 10 mA

VF(1) Forward voltage drop

Tj = 25 °C IF = 3 A 0.63

Tj = 125 °C 0.52 0.57

Tj = 25 °C IF = 6 A 0.84

Tj = 125 °C 0.63 0.72

dPtot

dTj <1

Rth(j-a)

STPS340-Y Characteristics

Doc ID 17390 Rev 1 3/8

Figure 1. Average forward power dissipation

versus average forward current

(per diode)

Figure 2. Average forward current versus

ambient temperature

( = 0.5, per diode)

0.0

0.5

1.0

1.5

2.0

2.5

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0

P (W)

F(AV)

δ=tp/T tp

I (A)

F(AV)

δ= 1

δ= 0.05

δ= 0.1 δ= 0.2 δ= 0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0 25 50 75 100 125 150

I (A)

F(AV)

T (°C)

amb

R =65°C/W

th(j-a)

R=R

th(j-a) th(j-l)

SMB / SMC

=tp/T tp

Figure 3. Non repetitive surge peak forward

current versus overload duration

(maximum values) (SMB)

Figure 4. Non repetitive surge peak forward

current versus overload duration

(maximum values) (SMC)

1.E-03 1.E-02 1.E-01 1.E+00

δ=0.5

I (A)

t(s)

T =25°C

T =75°C

T =125°C

SMB

1.E-03 1.E-02 1.E-01 1.E+00

δ=0.5

I (A)

t(s)

T =25°C

T =75°C

T =125°C

SMC

Figure 5. Normalized avalanche power

derating versus pulse duration

Figure 6. Normalized avalanche power

derating versus junction

temperature

0.001

0.01

0.10.01 1

0.1

10 100 1000

t (µs)

P(t)

P (1µs)

ARM p

ARM

0.2

0.4

0.6

0.8

1.2

25 50 75 100 125 150

T (°C)

P()

P (25°C)

ARM Tj

ARM

Characteristics STPS340-Y

4/8 Doc ID 17390 Rev 1

Figure 7. Relative variation of thermal

impedance junction to ambient

versus pulse duration (SMB)

Figure 8. Relative variation of thermal

impedance junction to ambient

versus pulse duration (SMC)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03

Z/R

th(j-a) th(j-a)

δ=tp/T tp

t (s)

Single pulse

SMB

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.E-02 1.E-01 1.E+00 1.E+01 1.E+02 1.E+03

Z/R

th(j-a) th(j-a)

δ=tp/T tp

t (s)

Single pulse

SMC

Figure 9. Reverse leakage current versus

reverse voltage applied

(typical values)

Figure 10. Junction capacitance versus

reverse voltage applied

(typical values)

I (mA)

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

1.E+01

0 5 10 15 20 25 30 35 40

=150°C

=125°C

=100°C

=75°C

=25°C

V (V)

100

1000

1 10 100

C(pF)

V (V)

F=1MHz

V =30mV

T =25°C

OSC RMS

Figure 11. Forward voltage drop versus

forward current

Figure 12. Thermal resistance junction to

ambient versus copper surface

under each lead

I (A)

0.01

0.10

1.00

10.00

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

=25°C

(Maximum values)

=125°C

(Typical values)

=125°C

(Typical values)

=125°C

(Maximum values)

V (V)

100

110

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

SMB / SMC

S (cm²)

R (°C/W)

th(j-a)

Printed circuit board FR4

copper thickness = 35 µm

STPS340-Y Package information

Doc ID 17390 Rev 1 5/8

2 Package information

●Epoxy meets UL94, V0

●Band indicates cathode on SMB and SMC

In order to meet environmental requirements, ST offers these devices in different grades of

ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®

specifications, grade definitions and product status are available at: www.st.com.

ECOPACK® is an ST trademark.

Figure 13. SMB footprint (dimensions in mm)

Table 5. SMB dimensions

Ref.

Dimensions

Millimeters Inches

Min. Max. Min. Max.

A1 1.90 2.45 0.075 0.096

A2 0.05 0.20 0.002 0.008

b 1.95 2.20 0.077 0.087

c 0.15 0.40 0.006 0.016

E 5.10 5.60 0.201 0.220

E1 4.05 4.60 0.159 0.181

D 3.30 3.95 0.130 0.156

L 0.75 1.50 0.030 0.059

2.60

5.84

1.62

2.18

1.62

Package information STPS340-Y

6/8 Doc ID 17390 Rev 1

Figure 14. Footprint dimensions (in millimeters)

Table 6. SMC package dimensions

Ref

Dimensions

Millimeters Inches

Min. Max. Min. Max.

A1 1.90 2.45 0.075 0.096

A2 0.05 0.20 0.002 0.008

b 2.90 3.2 0.114 0.126

c 0.15 0.41 0.006 0.016

E 7.75 8.15 0.305 0.321

E1 6.60 7.15 0.260 0.281

E2 4.40 4.70 0.173 0.185

D 5.55 6.25 0.218 0.246

L 0.75 1.40 0.030 0.063

CLE2

5.03

8.11

1.54

3.15

1.54

STPS340-Y Ordering information

Doc ID 17390 Rev 1 7/8

3 Ordering information

4 Revision history

Table 7. Ordering information

Order code Marking Package Weight Base qty Delivery mode

STPS340UY U34Y SMB 0.107 g 2500 Tape and reel

STPS340SY S34Y SMC 0.243 g

Table 8. Document revision history

Date Revision Changes

24-Oct-2012 1 First issue.

STPS340-Y

8/8 Doc ID 17390 Rev 1

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