參數(shù)資料
型號(hào)： RE5VL49AC
廠商： RICOH COMPANY LTD
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBCY3
封裝： TO-92, 3 PIN
文件頁(yè)數(shù)： 9/29頁(yè)
文件大?。?/td> 300K
代理商： RE5VL49AC
R
×5VL
14
OPERATION
FIG. 1 Block Diagram
Operation Diagram
Step 1. Output Voltage is equal to Power Source Voltage (VDD).
Step 2. When Input Voltage to Comparator reaches the state of Vref
≥ VDD(Rb+Rc)/(Ra+Rb+Rc)at Point A (Detected Voltage –VDET), the output of Com-
parator is reserved, so that Output Voltage becomes GND.
Step 3. In the case of CMOS Output, Output Voltage becomes unstable when Supply Voltage (VDD) is smaller than Minimum Operating Voltage. In the
case of Nch Open Drain Output, a pulled-up voltage is output.
Step 4. Output Voltage becomes equal to GND.
Step 5. When Input Voltage to Comparator reaches the state of Vref
≤VDD(Rb)/(Ra+Rb) at Point B (Released Voltage +VDET), the output of Comparator is reserved,
so that Output Voltage becomes equal to Supply Voltage (VDD)
FIG. 2 Operation Diagram
Step
Step 1
Step 2
Step 3
Step 4
Step 5
Comparator(+)Pin
Input Voltage
I
II
I
Comparator Output
H
L
Indefinite
L
H
Tr. 1
OFF
ON
Indefinite
ON
OFF
Output Tr.
Pch
ON
OFF
Indefinite
OFF
ON
Nch
OFF
ON
Indefinite
ON
OFF
I.
Rb + Rc
Ra + Rb + Rc
VDD
II.
Rb
Ra + Rb
VDD
GND
OUT
VDD
Ra
Rb
Rc
Tr.1
V
re
f
Pch
Nch
–
+
Detector Threshold Hysteresis
tPLH
1
2
3
4
5
A
B
In R
×5VL××A, Nch Tr. drain is con-
nected to OUT pin.
In R
×5VL××C, Nch Tr. drain and
Pch Tr. drain are connected to
OUT pin.
Released Volage +VDET
Supply Volage
Detected Volage –VDET
(VDD)
Minimum Operating Volage
GND
Output Volage
(OUT)
GND
相關(guān)PDF資料
PDF描述
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