SI3233 datasheet(13/100 Pages) SILABS

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Si3233

Preliminary Rev. 0.5

Figure 4. Si3233 DC-DC Converter Circuit

Table 12. Si3233 DC-DC Converter Component Values

Component(s)

Value

Supplier

10 µF, 100 V, Electrolytic, ±20%, low ESR (tan(

δ)< 0.08)

Panasonic

C10

0.1 µF, 50 V, X7R, ±20%

Murata, Johanson, Novacap, Venkel

C14*

0.1 µF, X7R, ±20%, low ESR (tan(

δ)< 0.08)

Murata, Johanson, Novacap, Venkel

C25*

10 µF, Electrolytic, ±20%

Panasonic

R16

200

Ω, 1/10 W, ±5%

R17

1/10 W, ±5% (See AN45 or Table 17 for value selection)

R18

1/4 W, ±5% (See AN45 or Table 17 for value selection)

R19,R20

1/10 W, ±1% (See AN45 or Table 17 for value selection)

Fuse

Belfuse SSQ Series

Ultra Fast Recovery 200 V, 1A Rectifier

General Semi ES1D; Central Semi

CMR1U-02

1A, Shielded Inductor (See AN45 or

Table 17 for value selection)

API Delevan SPD127 series, Sum-

ida CDRH127 series, Datatronics

DR340-1 series, Coilcraft DS5022

120 V, High Current Switching PNP

Zetex FZT953, FZT955, ZTX953,

ZTX955

60 V, General Purpose Switching NPN

ON Semi MMBT2222ALT1,

MPS2222A; Central Semi

CMPT2222A; Zetex FMMT2222

*Note: Voltage rating of this device must be greater than VDC.

2N2222

FZT953

ES1D

10uF

C252

10uF

C10

0.1 µF

R191

R201

R181

R16

200

R17

SDCH

SDCL

DCFF

DCDRV

GND

VBAT

C14 2

0.1uF

VDC

Note 1

Notes:

1. Values and configurations for these components can be derived from

Table 17 or from App Note 45.

2. Voltage rating for C14 and C25 must be greater than VDC.

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