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参数资料
| 型号： | TLV803ZDBZT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封装： | PLASTIC, SOT-23, 3 PIN |
| 文件页数： | 10/13页 |
| 文件大小： | 381K |
| 代理商： | TLV803ZDBZT |
V
DD
Transient
Amplitude
Duration
V
IT-
tw
RESET
V
DD
t
d
V
+V
IT
HYS
-
1.1V
ValidOutput
SBVS157A
– APRIL 2011 – REVISED JUNE 2011
APPLICATION INFORMATION
VDD TRANSIENT REJECTION
The TLV803 has built-in rejection of fast transients on the VDD pin. The rejection of transients depends on both
the duration and the amplitude of the transient. The amplitude of the transient is measured from the bottom of the
transient to the negative threshold voltage of the TLV803, as shown in Figure 7.
Figure 7. Voltage Transient Measurement
The TLV803 does not respond to transients that are fast duration/low amplitude or long duration/small amplitude.
Figure 4 shows the relationship between the transient amplitude and duration needed to trigger a reset. Any
combination of duration and amplitude above the curve generates a reset signal.
RESET DURING POWER UP/DOWN
The TLV803 output is valid when VDD is greater than 1.1 V. When VDD is less than 1.1 V, the output transistor
turns off and becomes high impedance. The voltage on the RESET pin rises to the voltage level connected to the
pull-up resistor. Figure 8 shows a typical waveform for power-up, assuming the RESET pin has a pull-up resistor
connected to the VDD pin.
Figure 8. Power-Up Response
6
Copyright
2011, Texas Instruments Incorporated
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| TLV809I50DBVT | 功能描述:监控电路 3Pin Supply Vltg Sup RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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| TLV809I50DBZT | 功能描述:监控电路 3P Supply Vltg Super RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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