參數(shù)資料
型號: NJU7705F-29A
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5
封裝: SOT-23, 5 PIN
文件頁數(shù): 9/10頁
文件大?。?/td> 92K
代理商: NJU7705F-29A
Ver.2005-02-28
NJU7704/05
- 9 -
!
FUNCTIONAL DESCRIPTION
(1) Basic Operation
(*8): C-MOS output product (NJU7705) : When V
DD
less than V
OPL
, V
OUT
is free of the shaded region.
(2) Description of Delay Time
Delay time can be set by the external capacitor. The delay time is given by the following:
External delay capacitor (nF) = Required delay time : td(ms) / 10(ms) x 4.7(nF)
NJU7704/05 Delay time vs Delay Capacitor (Cd)
0.01
0.1
1
10
100
1000
10000
0.001
0.01
0.1
1
10
100
1000
Delay Capacitor : Cd
nF
D
m
(1) When supply voltage(V
DD
) drops below
detection voltage(V
DET
), Output voltage(V
OUT
)
changes "H" to "L" to alert reset state.
(2) The reset state is kept while V
DD
is lower than
release voltage. The release voltage is a sum
of V
DET
and Hysterisis voltage (V
HYS
). Please
refer to the (*7) below.
(3) When V
DD
becomes higher than the release
voltage and reset release delay time set by
the external capacitors is past, then V
OUT
changes from "L" to "H" to resume normal
state.
(*7) V
HYS
is to avoid unstable V
OUT
state caused
by rapid voltage change at nearby V
DET
.
Detection voltage
(V
DET
)
Release voltage
(V
DET
+ V
HYS
)
Hysteresis voltage
(V
HYS
)
Supply voltage
(V
DD
)
Output voltage
(V
OUT
)
Minimum operation
voltage (V
OPL
)
V
SS
V
SS
Delay time
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