參數(shù)資料
型號: AP-211
廠商: California Micro Devices Corporation
英文描述: Instantly Available PCI Card Power Management
中文描述: 即時可用的PCI卡電源管理
文件頁數(shù): 6/7頁
文件大?。?/td> 631K
代理商: AP-211
9/99
6
215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 www.calmicro.com
CALIFORNIA MICRO DEVICES
AP-211
V
CC
power-down with V
AUX
=3.3V
Ch1: V
CC
, offset 4.0V
Ch2: V
, offset 3.3V
Ch3: DRIVE
Figure 10 shows V
approaching the disable threshold
during a 5V to 0V transition. V
is set to 3.3V DC. When
V
goes down to the 4.1V disable threshold, the regulator
turns OFF. The rebound on V
is due to the step change of
the voltage drop across the series resistance of the input.
The output voltage V
experiences a negative glitch due
to the parasitic resistance and inductance on the V
line.
The 250mV hysteresis ensures the regulator remains enabled
during the transient.
Ch1: V
CC
, offset 4.1V
Ch2: V
, offset 3.3V
Ch3: DRIVE
Figures 11 - 14 show power-up and power-down transitions
with V
AUX
set to 3.0V and 3.6V.
Ch1: V
CC
, offset 4.1V
Ch2: V
, offset 3.3V
Ch3: DRIVE
V
CC
power-up with V
AUX
=3.0V
Ch1: V
CC
, offset 4.1V
Ch2: V
, offset 3.3V
Ch3: DRIVE
V
CC
power-down with – V
AUX
=3.6V
V
CC
power-down with V
AUX
=3.0V
V
CC
power-up with V
AUX
=3.3V
Ch1: V
CC
, offset 4.1V
Ch2: V
, offset 3.3V
Ch3: DRIVE
Figure 9 shows V
approaching the enable threshold during
a 0V to 5V transition. V
is set to 3.3V DC. In this case,
the output capacitor is already set to 3.3V, so that when
the regulator turns ON, the in-rush current is minimized.
The transition on V
is clean. The test set-up series
resistance on the V
input is estimated at about 160m
.
At full load, the output voltage is above 3.2V.
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
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