CMPWR160SA CALMIRCO [California Micro Devices Corp], CMPWR160SA Datasheet - Page 7

• Manufacturer Part Number: CMPWR160SA
• Description: USB peripheral Power Management
• Manufacturer: CALMIRCO [California Micro Devices Corp]

©2000 California Micro Devices Corp. All rights reserved. SmartOR™ is a trademark of California Micro Devices Corporation.
12/5/2000
Typical Transient Characteristics
V
Figure 8 shows the output response of the regulator
during a complete power down situation under full load
conditions with
Shutdown Transient Response
The transient response of the output voltage to the
pin is shown in Figure 9. The graph shows that a rising
edge on the
edge disables the regulator.
The rise and fall time for the output voltages are 100µs
and 200µs respectively.
POR
The transient response of the active low POR pin to V
is shown in Figure 10. When V
POR
to logic low (0V). The pin remains at logic low for 30ms
then it is forced to logic high (3.3V). If V
POR
will remain logic low. If it falls below the voltage threshold
and then recovers the 30ms time will reset.
When V
immediately forced to logic low.
V
work without V
CC
CC
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is tied to ground to show that the
Power down
threshold voltage (typically 2.9V), the pin is forced
threshold voltage during this 30ms interval
Response
OUT
falls below the
SD
CC
SD
pin enables the regulator and a falling
present.
tied to V
POR
CC
.
OUT
threshold voltage
rises above the
POR
OUT
continued
falls below the
circuitry will
POR
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POR
SD
OUT
is
Tek Run
Tek
Tek Run
2
2
Figure 9. Shutdown Transient Response
V OUT
V OUT
POR
SD
1.00V
1.00V
1.00V
25.0kS/s
25.0kS/s
5.0kS/s
2.7V
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Figure 8. V
Figure 10.
V OUT
3.1V
Ch2 1.00V
Ch2
Ch2
Sample
V CC
Sample
3 Acqs
(500mA Load)
200mV
5.00V
CC
POR
Power Down
M 2.00ms
M 10.0ms
M 200µs
Response
(500mA Load)
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Ch2
Ch2
Ch2
CMPWR160
3.50V
2.90V
3.0V
7