ZXSC100

SEMICO NDUC TORS

ISSUE 3 - JANUARY 2004

8

Q1

FMMT617

R2

R1

L1

D1

ZHCS1000

R3

R4

C2

C1

3.3V/0.33A

BAS

EM

RE

U1

ZXSC100

Q2

C3

FB

Ref

Value

Part Number

Manufacturer

Comments

U1

N/A

ZXSC100X8

Zetex Plc

Single cell converter, MSOP8

Q1

20V, 13m

Ω,7A

FMMT617

Zetex Plc

Low VCE(SAT) NPN, SOT23

Q2

N/A

2N2907

Various

Small signal transistor

D1

0.5V, 2A

ZHCS1000

Zetex Plc

1A Shottky diode

R1

3.3

Ω*

Generic

Various

0805 Size

R2

33m

Ω

Generic

Various

0805 Size

R3

110k

Ω

Generic

Various

0805 Size

R4

30k

Ω

Generic

Various

0805 Size

C1

220µF

TPSD227M010R0100

AVX

Low ESR tantalum capacitor

C2

220µF

TPSD227M010R0100

AVX

Low ESR tantalum capacitor

C3

1nF

Generic

Various

0805 Size

L1

22µH

D01608C-223

D03316P-223

Coilcraft

Low profile SMT

* Note: Refer to External Transistor base drive selection in the Applications Section.

MATERIALS LIST