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MOSFET

George HsiehTechnical MarketingGeorge_hsieh@techmosa.com.twTEL: 82267698 ext.3001

0935041907

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AGENDAWhat is MOSFET?

CMOS

Operation of MOSFET

Architectures of MOSFET

Trench MOSFET

Specification of MOSFET

ABOUT SSS

4 Target parts

Applications

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What is MOSFET?

M O FS

Metal Oxide

Semiconductor

Field

E T

Effect

Transistor

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Drain()

Source()

Gate() Metal

Field Effect Transistor

(N)

(N)

Semiconductor

P(Positive)

N(Negative)

Oxide Silicon Oxide --- glass()

(P)

N Channel MOSFET

: ,

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CMOS

--- Complimentary MOSP+N

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Drain()

Source()

Metal

Oxide

Source()

Drain()

Gate()Gate()

Operation of Mosfet

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Drain()

Source()

Source()

Drain()

Gate()

Metal

Oxide

Gate()

Operation of Mosfet

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Architecture of MOSFET

N+ N+

Substrate

P

Source DrainGate

N+ N+P

Source

Drain

Gate Source

N-

N+ Sub

Vertical

PN NN NN N

Lateral

N N NN NN

N

N

N

NN

N

Low Rds(ON) per cell, Cannot be paralleled for high current, high voltage application.

Source

Gate

Drain

Gate

Drain

Source

Substrate

NNN

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N+ N+P P

N+ Sub

Source

Drain

Gate

Source

N-

Trench MOSFET

1. Lower Rds(ON)

2. Smaller die

3. Special process

Cost = die area x mask #

NN

NN

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Specifications of MOSFET

N channel

P channel

(X3)

()

()

()G

D

S

G

S

D

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ABOUT SSS

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4 Target Parts

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1. Inverter

0

1

1

1

0SSS2N7002EBSS138

Applications

2. Power SwitchP Channel

SSM9435

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10845V 3.3V

AZ431

R1

R2

AS358

SSD30555V 3.3V

3. LDO

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4. PWM regulator

LL

CC

LM3475/85

12VinSSM9435

3.3V

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Q & A

Thanks !