CM2400-01 Datasheet, PDF (13/14 Pages) California Micro Devices Corp – Universal Serial Bus Transceiver with Level Translator

Application Information (cont’d)
The CM2400-01HB includes an internal 3.3V LDO that
powers the transceiver from the V_BUS. A capacitor (1µF
typical) is required on the regulator output (V_REG pin).
This output can only be used to power a limited exter-
nal load of a few milliamperes (mA). For USB-powered
peripheral applications, the 5V V_BUS line can be regu-
lated down to 3.3V or a lower voltage as shown in
Figure 10, using a CM3019 regulator. This regulator
provides excellent line and load regulation as well as
current limit and thermal overload protection.
The USB specification recommends the use of a 1µF to
10µF capacitor to be connected to the 5V V_BUS.
Please contact factory at 800-325-4966 to request on
the availability of evaluation boards.
CM2400-01
© 2003 California Micro Devices Corp. All rights reserved.
10/01/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: [phone] L Fax: [phone] L www.calmicro.com 13