Low power solution, VOUT=3.3V, PL=0.33W
L1
VBATT
R1
U1
EM
VDRIVE
BAS ISENSE
RE
FB
VCC
GND
ZXSC100
C1
ZXSC100
D1
ZHCS2000
3.3V/0.1A
Q1
R3
ZXT14N20DX
C3
C2
R2
R4
Materials list
Ref Value
Part Number
U1
N/A
ZXSC100X8
Q1
20V, 13mΩ, 7A ZXT14N20DX
D1
0.5V, 2A
ZHCS2000
R1
0Ω*
Generic
R2
33mΩ
Generic
R3
110kΩ
Generic
R4
30kΩ
Generic
C1
220µF
TPSD227M010R0100
C2
220µF
TPSD227M010R0100
C3
1nF
Generic
L1
22µH
D01608C-223
D03316P-223
Manufacturer Comments
Zetex Plc
Single cell converter, MSOP8
Zetex Plc
Low VCE(sat) NPN, MSOP8
Zetex Plc
2A Shottky diode
Various
0805 Size
Various
0805 Size
Various
0805 Size
Various
0805 Size
AVX
Low ESR tantalum capacitor
AVX
Low ESR tantalum capacitor
Various
0805 Size
Coilcraft
Low profile SMT
* Note: Refer to External Transistor base drive selection in the Applications Section.
ISSUE 1 - JANUARY 2001
7