參數(shù)資料
型號(hào): CAT863TTBI-GT10
廠商: ON SEMICONDUCTOR
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3
封裝: HALOGEN FREE AND ROHS COMPLIANT, TO-236, SOT-23, 3 PIN
文件頁(yè)數(shù): 6/10頁(yè)
文件大?。?/td> 648K
代理商: CAT863TTBI-GT10
CAT853, CAT863, CAT859, CAT869
2009 SCILLC. All rights reserved.
5
Doc. No. MD-3026, Rev. G
Characteristics subject to change without notice
DETAILED DESCRIPTION
RESET TIMING
The reset signal is asserted low for the CAT853,
CAT863, CAT859, and CAT869 when the power
supply voltage falls below the threshold trip voltage
and remains asserted for at least 140 ms after the
power supply voltage has risen above the threshold.
Figure 1. Reset Timing Diagram
VCC TRANSIENT RESPONSE
The CAT853, CAT863, CAT859, and CAT869 protect
Ps
against
brownout
failure.
Short
duration
transients of 4 s or less and 100 mV 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. 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 0.5 V above the
threshold and drops below it by the amplitude of the
overdrive voltage (VTH - VCC).
Figure 2. Maximum Transient Duration Without Causing a Reset Pulse vs. Reset Comparator Overdrive
5 V
0 V
5 V
0 V
Threshold
Voltage
140 ms
minimum
Reset Timeout Period
Power
Supply
Voltage
RESET
“C” THRESHOLD
“M” THRESHOLD
RESET OVERDRIVE VTH - VCC [mV]
TAMB = 25C
T
RANS
IE
NT
DUR
A
TIO
N
[s]
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