© 2000 Calirornia 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

CALIFORNIA MICRO DEVICES

CMPWR300

11

Fig 3.2. Output Voltage (Rated) vs. Temperature. This

shows the regulator steady state performance when fully

loaded (500mA) in an ambient temperature up to the rated

maximum of 70°C. The output variation at maximum load is

below 10mV across the normal temperature operating.

Fig 3.3. Thresholds vs. Temperature.

This shows the regulator select/deselect threshold variation

up to the maximum rated junction temperature. The overall

125°C change in junction temperature causes a 30mV

variation in the select threshold voltage (regulator enable).

The deselect threshold level varies about 30mV over the

125°C change in junction temperature. This results in the

built-in hysteresis have a minimal variation of 40mV over

the entire operating junction temperature range. The hysteresis

increases with temperature up to 240mV at 125°C.

Fig 3.4. V

This shows the V

maximum rated junction temperature. The overall 125°C

change in junction temperature causes a 80mΩ variation in

the switch resistance. The switch resistance remains below

0.2Ω, even at a junction temperature of 125°C.

Typical Thermal Characteristics cont’d

Fig 3.3. Thresholds vs. Temperature

4.1

4.2

4.3

4.4

4.5

0

25

50

75

100

125

150

Junction Temperature [°C]

Vselect

Vdeselect

Fig 3.4. Vaux Switch Resistance vs.

Temperature

0

40

80

120

160

200

025

50

75

100

125

Junction Temperature [°C]

Fig 3.2. Output Voltage (Rated) vs.

Temperature

3.280

3.290

3.300

3.310

3.320

0

102030

40

5060

70

Ambient Temperature [° C]

500mA load