CMPWR280 Ver la hoja de datos (PDF) - California Micro Devices Corp

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CMPWR280

1.5A SmartOR™ Dual Regulator with VAUX Drive

California Micro Devices Corp 

CMPWR280

Typical DC Characteristics (cont’d)

Ground Current is shown across the entire range of

load conditions in Figure 4. The ground current of 2mA

has minimal variation across the range of load condi-

tions and shows only a slight increase at maximum

load. This slight increase at rated load is due to the

current limit protection circuitry becoming active.

3.0

2.5

2.0

1.5

1.0

0.5

0.0

0

500

1000

Load Current [mA]

Figure 4. Ground Current

1500

VCC Supply Current of the device is shown across the

entire VCC range in Figure 5.

In the absence of VAUX, the supply current remains

fixed at approximately 0.15mA until VCC reaches the

Select voltage threshold of 4.35V. At this point the reg-

ulator is enabled and a supply current of 1.0mA is con-

ducted.

When VAUX is present, the VCC supply current is less

than 10µA until VCC exceeds VAUX, at which point VCC

then powers the controller (0.15mA). When VCC

reaches VSELECT, the regulator is enabled.

Fig 1.5. Vcc Supply Current (No Load)

10000

1000

100

10

1

2

3

4

5

Vcc [V]

Figure 5. VCC Supply Current (no load)

© 2004 California Micro Devices Corp. All rights reserved.

6 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 08/16/04

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