Vishay 47CTQ020PbF Data Sheet

TO-220AB

PRODUCT SUMMARY

I

F(AV)

V

R

I

RM

Schottky Rectifier, 2 x 20 A

FEATURES

• 150 °C TJ operation

Base

common

Anode

2

cathode

2

Common

13

cathode

2 x 20 A

20 V

310 mA at 125 °C

Anode

• Center tap configuration

• Optimized for 3.3 V application

• Ultralow forward voltage drop

• High frequency operation

• Guard ring for enhanced ruggedness and long term
reliability

• High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance

• Lead (Pb)-free (“PbF” suffix)

• Designed and qualified for industrial level

DESCRIPTION

This center tap Schottky rectifier has been optimized for
ultralow forward voltage drop specifically for 3.3 V output
power supplies. The proprietary barrier technology allows for
reliable operation up to 150 °C junction temperature. Typical
applications are in switching power supplies, converters,
reverse battery protection, and redundant power
subsystems.

47CTQ020PbF

Vishay High Power Products

Available

RoHS*

COMPLIANT

MAJOR RATINGS AND CHARACTERISTICS

SYMBOL CHARACTERISTICS VALUES UNITS

I

F(AV)

V

RRM

I

FSM

V

F

T

J

Rectangular waveform 40 A

20 V

tp = 5 µs sine 1000 A

20 Apk, TJ = 125 °C 0.34 V

- 55 to 150 °C

VOLTAGE RATINGS

PARAMETER SYMBOL TEST CONDITIONS 47CTQ020PbF UNITS

Maximum DC reverse voltage V

125 °C 20

R

150 °C 10

V

ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS

Maximum average
forward current

Maximum peak one cycle non-repetitive
surge current per leg

Non-repetitive avalanche energy per leg E

Repetitive avalanche current per leg I

per leg

per device 40

I

F(AV)

I

FSM

AR

50 % duty cycle at TC = 135 °C, rectangular waveform

5 µs sine or 3 µs rect. pulse

10 ms sine or 6 ms rect. pulse 250

TJ = 25 °C, IAS = 3 A, L = 3 mH 18 mJ

AS

Current decaying linearly to zero in 1 µs
Frequency limited by T

maximum VA = 1.5 x VR typical

J

Following any rated load
condition and with rated
V

applied

RRM

20

1000

3A

A

* Pb containing terminations are not RoHS compliant, exemptions may apply

Document Number: 94227 For technical questions, contact: [e-mail]
Revision: 12-Sep-08 1

www.vishay.com

47CTQ020PbF

Vishay High Power Products

Schottky Rectifier, 2 x 20 A

ELECTRICAL SPECIFICATIONS

PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS

20 A

40 A 0.51

Maximum forward voltage drop per leg V

FM

(1)

40 A 0.44

20 A

20 A

40 A 0.42

TJ = 125 °C

Maximum reverse leakage current per leg I

Threshold voltage V

Forward slope resistance r

Maximum junction capacitance per leg C

Typical series inductance per leg L

RM

F(TO)

(1)

T

J

T

J

T

J

TJ = TJ maximum 0.188 V

t

VR = 5 VDC (test signal range 100 kHz to 1 MHz) 25 °C 3000 pF

T

Measured lead to lead 5 mm from package body 5.5 nH

S

Maximum voltage rate of change dV/dt Rated V

Note

(1)

Pulse width < 300 µs, duty cycle < 2 %

T

= 25 °C

J

T

= 125 °C

J

= 150 °C

T

J

= 5 V 60

V

R

= 3.3 V 45

V

R

= 150 °C VR = 10 V 306

= 25 °C

= 125 °C 310

R

V

= Rated V

R

R

0.45

0.34

0.31

3

5.9 mΩ

10 000 V/µs

V

mA

THERMAL - MECHANICAL SPECIFICATIONS

PARAMETER SYMBOL TEST CONDITIONS VALUES UNITS

Maximum junction and storage
temperature range

Maximum thermal resistance,
junction to case per leg

Maximum thermal resistance,
junction to case per package

Typical thermal resistance,
case to heatsink

Approximate weight

Mounting torque

minimum 6 (5)

maximum 12 (10)

Marking device Case style TO-220AB 47CTQ020

T

, T

J

Stg

R

DC operation

thJC

R

thCS

- 55 to 150 °C

1.5

0.75

Mounting surface, smooth and greased 0.50

2g

0.07 oz.

°C/W

kgf · cm

(lbf · in)

www.vishay.com For technical questions, contact: [e-mail]

Document Number: 94227

2 Revision: 12-Sep-08

47CTQ020PbF

Schottky Rectifier, 2 x 20 A

1000

100

TJ = 150 °C

= 125 °C

T

0.8

10 000

J

= 25 °C

T

J

1.2

10

1

- Instantaneous Forward Current (A)

F

I

0.40 0.2 0.6 1.0 1.4

VFM - Forward Voltage Drop (V)

Fig. 1 - Maximum Forward Voltage Drop Characteristics

(Per Leg)

Vishay High Power Products

1000

TJ = 150 °C

100

10

1

- Reverse Current (mA)

0.1

R

I

0.01

0

Fig. 2 - Typical Values of Reverse Current vs.

TJ = 125 °C

TJ = 100 °C

TJ = 75 °C

TJ = 50 °C

TJ = 25 °C

8412

VR - Reverse Voltage (V)

Reverse Voltage (Per Leg)

16

20

- Junction Capacitance (pF)

T

C

1000

2

0610

8 12 16 20

4 14 18 22

VR - Reverse Voltage (V)

Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage (Per Leg)

10

1

0.1

Single pulse

- Thermal Impedance (°C/W)

thJC

Z

0.01

0.00001 0.0001 0.001 0.01 0.1

(thermal resistance)

t1 - Rectangular Pulse Duration (s)

Fig. 4 - Maximum Thermal Impedance Z

TJ = 25 °C

D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20

Notes:

1. Duty factor D = t

2. Peak TJ = PDM x Z

1

Characteristics (Per Leg)

thJC

P

DM

t

1

t

2

1/t2

+ T

thJC

C

10

100

Document Number: 94227 For technical questions, contact: [e-mail]

www.vishay.com

Revision: 12-Sep-08 3