CMPWR160 Просмотр технического описания (PDF) - California Micro Devices Corp
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CMPWR160 Datasheet PDF : 10 Pages
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CALIFORNIA MICRO DEVICES
Typical Transient Characteristics continued
Load Step response
Figure 11 shows the output voltage (Ch1) response of
the regulator during a step load change between 5mA
and 500mA (represented on Ch2). For the 5mA to
500mA transition an initial transient overshoot of 60mV
occurs and then the output settles to its final voltage
within 20µs. For the 500mA to 5mA transition there is
also an initial overshoot of 60mV however it takes
approximately 250µs to settle to its final voltage.
The overall DC voltage disturbance on the output is
approximately 25mV, which demonstrates the regulator
output impedance of 50mΩ.
VOUT offset = 3.3V
CMPWR160
Tek Run 250kS/s Sample
Load
5mA
500mA
1
VOUT (offset = 3.3V)
Line Step Response
Figure 12 shows the output response of the regulator to
a VCC line voltage transient between 4.5V and 5.5V
(1Vpp as shown on Ch2). The load condition during this
test is 5mA. The output response produces less than
10mV of disturbance on both edges indicating a line
rejection of better than 40dB at high frequencies.
VOUT offset = 3.3V
Ch1 50.0mV
2.00V M 200µs Ch2 1.60V
Figure 11. Load Step Response
Tek
250kS/s
2 Acqs
2 VCC
4.5V
5.5V
(5mA Load)
VOUT(offset = 3.3V)
Reset response time with overdrive
Figure 13 shows the time it takes for the POR signal to
reset when the output voltage is driven below the POR
trigger threshold by varying amounts. The amount the
voltage is driven below the POR trigger threshold is the
overdrive voltage.
20.0mV Ch2 500mV M 200µs Ch2 5.00V
Figure 12. Line Step Response
1000
100
10
1
0
50
100 150 200 250 300
Overdrive (mV)
Figure 13. Reset Response Time with Overdrive
©2000 California Micro Devices Corp. All rights reserved. SmartOR™ is a trademark of California Micro Devices Corporation.
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214
Fax: (408) 263-7846
8
www.calmicro.com
12/5/2000
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