MBR120VLSFT1_05 datasheet(4/6 Pages) ONSEMI

Part #	MBR120VLSFT1

Description	Surface Mount Schottky Power Rectifier

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MBR120VLSFT1

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4

12

0

VR, REVERSE VOLTAGE (VOLTS)

500

100

0

48

TJ = 25°C

20

16

Figure 7. Capacitance

12

0

VR, DC REVERSE VOLTAGE (VOLTS)

125

100

65

6.0

2.0

4.0

8.0

10

20

14

16

18

Figure 8. Typical Operating Temperature

Derating*

* Reverse power dissipation and the possibility of thermal runaway must be considered when operating this device under any re-

verse voltage conditions. Calculations of TJ therefore must include forward and reverse power effects. The allowable operating

TJ may be calculated from the equation:

TJ = TJmax − r(t)(Pf + Pr) where

r(t) = thermal impedance under given conditions,

Pf = forward power dissipation, and

Pr = reverse power dissipation

This graph displays the derated allowable TJ due to reverse bias under DC conditions only and is calculated as TJ = TJmax − r(t)Pr,

where r(t) = Rthja. For other power applications further calculations must be performed.

70

75

80

85

90

95

105

110

115

120

RqJA = 25.6°C/W

400

°C/W

324.9

°C/W

235

°C/W

130

°C/W

10

26

18

14

200

300

400

Figure 9. Thermal Response

1000

0.1

0.00001

t1, TIME (sec)

1000

1

0.0001

0.001

0.01

1

10

100

0.000001

0.1

10

100

P(pk)

t1

t2

DUTY CYCLE, D = t1/t2

qJA = 321.8 °C/W

Test Type > Min Pad < Die Size 38x38 @ 75% mils

D = 0.5

SINGLE PULSE

0.2

0.1

0.05

0.01

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