CALIFORNIA MICRO DEVICES

©2000 California Micro Devices Corp. All rights reserved.

12/5/2000

215 Topaz Street, Milpitas, California 95035

Tel: (408) 263-3214

Fax: (408) 263-7846

www.calmicro.com

CMPWR300

4

Typical DC Characteristics

Unless stated otherwise, all DC characteristics were measured at room temperature with a nominal V

volts and an output capacitance of 10µF.

Fig 1.1.

Line regulation of the regulator is shown here. At maximum

rated load conditions (500mA), a 100mV drop in regulation

occurs when the line voltage falls below 3.8V. For light load

conditions (100mA), regulation is maintained for line voltages

as low as 3.5V.

In normal operation the regulator is deselected at 4.2V, which

ensures a regulation output drop of less than 100mV is

maintained.

Fig 1.2.

Load regulation (pulse condition) performance is shown up

to and beyond the rated load. A change in load from 10%

to 100% of rated (50mA to 500mA) results in an output

voltage change of about 20mV. This translates into an

effective output impedance of less than 50mΩ.

Fig 1.3.

V

V

about 130mΩ down to 110mΩ.

Fig 1.2. Load Regulation (pulse condition)

3.24

3.26

3.28

3.30

3.32

3.34

3.36

0

200

400

600

800

Load Current [mA]

Fig 1.1. Line Regulation

3.05

3.10

3.15

3.20

3.25

3.30

3.35

3.0

3.5

4.0

4.5

5.0

Vcc [V]

100mA load

500mA load

Fig 1.3. Vaux Switch Resistance vs. Vaux

60

80

100

120

140

160

180

200

2.7

3

3.3

3.6

Vaux [V]