CALIFORNIA MICRO DEVICES
CMPWR300
Typical Thermal Characteristics contd
Fig 3.2. Output Voltage (Rated) vs.
Temperature
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.
3.320
3.310
3.300
3.290
3.280
500mA load
0
10
20
30
40
50
60
70
Ambient Temperature [° C]
Fig 3.3. Thresholds vs. Temperature
Vselect
4.5
4.4
4.3
4.2
4.1
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.
Vdeselect
0
25
50
75
100
125
150
Junction Temperature [°C]
Fig 3.4. Vaux Switch Resistance vs.
Temperature
200
160
120
80
Fig 3.4. VAUX Switch Resistance vs. Temperature.
This shows the VAUX switch ON resistance variation up to the
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.
40
0
0
25
50
75
100
125
Junction Temperature [°C]
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© 2000 Calirornia Micro Devices Corp. All rights reserved.
12/5/2000
215 Topaz Street, Milpitas, California 95035
Tel: (408) 263-3214
11
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
