12

LTC1422

Power N-Channel and Sense Resistor Selection

The decision of which external power N-Channel to use is

dependent on its maximum current rating and the maxi-

transistor. Table 1 lists some transistors that are available.

Table 2 lists some current sense resistors that can be

used with the circuit breaker. Since this information is

subject to change, please verify the part numbers with the

manufacturer. Table 3 lists the web sites of several manu-

facturers.

Table 1. N-Channel Selection Guide

CURRENT LEVEL (A)

PART NUMBER

DESCRIPTION

MANUFACTURER

0 to 2

MMDF3N02HD

Dual N-Channel SO-8

ON Semiconductor

2 to 5

MMSF5N02HD

Single N-Channel SO-8

ON Semiconductor

5 to 10

MTB50N06V

Single N-Channel DD Pak

ON Semiconductor

10 to 20

MTB75N05HD

Single N-Channel DD Pak

ON Semiconductor

Table 2. Sense Resistor Selection Guide

CURRENT LIMIT VALUE

PART NUMBER

DESCRIPTION

MANUFACTURER

1A

LR120601R050

0.05

Ω 0.25W 1% Resistor

IRC-TT

2A

LR120601R025

0.025

Ω 0.25W 1% Resistor

IRC-TT

2.5A

LR120601R020

0.02

Ω 0.25W 1% Resistor

IRC-TT

3.3A

WSL2512R015F

0.015

Ω 1W 1% Resistor

Vishay-Dale

5A

LR120601R010

0.01

Ω 0.25W 1% Resistor

IRC-TT

10A

WSR2R005F

0.005

Ω 2W 1% Resistor

Vishay-Dale

Table 3. Manufacturers’ Web Sites

MANUFACTURER

WEB SITE

TEMIC Semiconductor

www.temic.com

International Rectifier

www.irf.com

ON Semiconductor

www.onsemiconductor.com

Harris Semiconductor

www.semi.harris.com

IRC-TT

www.irctt.com

Vishay-Dale

www.vishay.com