参数资料
型号: CAT809STBI-GT10
厂商: ON SEMICONDUCTOR
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3
封装: GREEN, TO-236, SOT-23, 3 PIN
文件页数: 11/14页
文件大小: 533K
代理商: CAT809STBI-GT10
CAT803, CAT809, CAT810
6
Doc. No. MD-3004, Rev. Z
2009 SCILLC. All rights reserved.
Characteristics subject to change without notice
0V
CAT803, CAT809
5V
0V
5V
RESET/OUT
RESET
TD
VTH
VCC
TR
(140ms
minimum)
Reset Timeout Period
CAT810
0V
5V
DETAILED DESCRIPTIOnS
RESET TIMInG
The reset signal is asserted LOW for the CAT803/
CAT809 and HIGH for the CAT80 when the power
supply voltage falls below the threshold trip voltage and
remains asserted for at least 40ms after the power
supply voltage has risen above the threshold.
figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
TRANSIENT
DURA
TION
(s)
VCC TRAnSIEnT RESPOnSE
The CAT803/CAT809/CAT80 protect Ps against
brownout failure. Short duration transients of 4sec
or less and 00mV amplitude typically do not cause a
false RESET.
Figure 2 shows the maximum pulse duration of negative-
going VCC transients that do not cause a reset condition.
figure 1. Reset Timing Diagram
As the amplitude of the transient goes further below
the threshold (increasing VTH - VCC), the maximum
pulse duration decreases. In this test, the VCC starts
from an initial voltage of 0.5V above the threshold and
drops below it by the amplitude of the overdrive voltage
(VTH - VCC).
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