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参数资料
| 型号： | R3133Q14EA-TR-FA |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封装： | SC-82-AB, 4-PIN |
| 文件页数： | 8/24页 |
| 文件大小： | 250K |
| 代理商： | R3133Q14EA-TR-FA |
R3132x/R3133x
16
OPERATION
Operation of R3132x Series
OUT
VDD
GND
Vref
+
-
Nch
Rb
Ra
Pch
Comparator
Delay
Circuit
Block Diagram
CMOS Output Type
OUT pin is connected to the drain of Nch Tr. and Pch Tr. in this IC.
Nch Open Drain Output Type
OUT pin is connected to the drain of Nch Tr. in this IC.
(OUT pin should be pulled up to VDD or an external voltage level.)
GND
A
B
1
GND
tDELAY
Detector Threshold (VDET)
=Relased Voltage
Supply
Voltage
(VDD)
Output
Voltage
(OUT)
Minimum Operating Voltage
(VDDL)
2
3
4
5
Operating Diagram
In the above diagram,
1 Output voltage becomes equal to supply voltage (Nch open drain output type; equal to pull-up Voltage).
2 When the supply voltage is down to the detector threshold level (Point A), Vref >
= VDD × Rb / (Ra+Rb) is true.
Then, the output of the comparator is reversed, thus output voltage becomes equal to GND level.
3 When the supply voltage is lower than minimum operating voltage, the output of transistor is indefinite,
therefore the output is also indefinite.
4 Output voltage is equal to GND level.
5 When the supply voltage is higher than the released voltage (Point B), Vref >
= VDD × Rb / (Ra+Rb) is true. Then
the output of the comparator is reversed, thus the output voltage becomes equal to the supply voltage (Nch
open drain output type; equal to pull-up voltage).
There is no hysteresis range between the detector threshold and the released voltage.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R3133QXXEX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Management ICs |
| R3134 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| R3134R | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| R3135 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| R3135P | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
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