參數(shù)資料
型號： S-875635B
廠商： Seiko Instruments Inc.
英文描述： High Withstand-Voltage Regulators With a Reset Function, Which Integrates High-Precision Voltage Detection And Voltage Regulation Circuits On a Single Chip.(VR輸出5.6V,VD檢測3.5V,帶復位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)集成了高精度的電壓檢測器VD和穩(wěn)壓器VR))
中文描述： 高耐壓，隨著復位功能，它集成了高精度電壓檢測電路和電壓調(diào)整在單一芯片上。（村輸出5.6V，性病檢測3.5V的，帶復位功能的高抗電壓穩(wěn)壓器（芯片內(nèi)穩(wěn)壓器集成了高精度的電壓檢測器和穩(wěn)壓器性病村））
文件頁數(shù)： 17/34頁
文件大小： 239K
代理商： S-875635B
HIGH WITHSTAND-VOLTAGE VOLTAGE REGULATOR WITH RESET FUNCTION
S-87X Series
16
Seiko Instruments Inc.
capacitor Cout flows. Hence, oscillation momentarily starts until the output of regulator V
out
rises high
enough even though
V
IN
is set less than Vhys. But Short-circuit protection circuit controls the rush current
less than Imax on fig.8. If this momentary oscillation is a problem in your applicaion, setting R
IN
less than
Vhys/Imax prevents oscillation.
In the S-87XXXXE series, the minimum operating voltage becomes 2.0 V as V
IN
voltage. If a drop in V
IN
voltage
occurs due to load current or rush current to be charged to the output capacitor when load current or the voltage
regulator is powered on at the time of release, set V
IN
to 2.0 V or more.
Also, in the S-87XXXXE Series, when sharply increasing only V
IN
pin voltage at 1 ms/V or less, with the SENSE pin
fixed to -V
DET
≥
V
SENSE
≥
-V
DET
-2V, a release pulse is output to the output pin of voltage detector. Be careful. In this
case, this release pulse is removed by setting the time constant of V
OR
pin 20ms or more with capacitance and pull-
up resistance. In addition, when the voltage of SENSE pin is fixed to between the detection voltage and the release
voltage at the detect condition, if sharply increasing only V
IN
pin voltage at 1 ms/V or less, the output of the detector
turns to the release condition. If this action is a problem in your system, please connect SENSE pin to V
IN
pin.
6.
Shutdown Circuit (S-87XXXXC/E Series)
When V
PF
pin goes low (0.4 V or less) in the S-87XXXXC Series or at the time of voltage detection in the S-87XXXXE series,
current for the voltage regulator is shut down, with the current consumption (excluding the current which flows through the
pull-up resistor) lowered to 3.5
μ
A or less.
During shutdown, the M1 transistor in the voltage regulator shown in the Figure 6 is off and V
OUT
pin is pulled down by R1
and R2, whose value (R1+R2) is 5M
to 10M
. Input current of V
PF
pin is 0.1
μ
A or less.
Notes
The output voltage may not become 0 V if a load making I
OUT
under 50
μ
A is connected during shutdown..
DO NOT keep V
PF
pin floating state or in medium potential (between low and high levels). Otherwise a through-
type
current
occurs.
Figure 11
A drop in V
IN
due to rush current
+V
DET
When
V
IN
>
Vhys:
Power Voltage
-V
DET
V
hys
DV
IN
V
IN
voltage
V
OR
[Attention1]
[Attention2]
V
SS
V
OR
V
IN
V
PF
V
OUT
I
IN
R
IN
R
L
C
OUT
S-87XXXXEUP
S-87XXXXCUP
V
SS
V
OR
V
IN
SENSE
V
OUT
I
IN
R
IN
R
L
C
OUT
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