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参数资料
| 型号： | TC51N1802ECBRT |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封装： | SOT-23A, 3 PIN |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 代理商： | TC51N1802ECBRT |
TC51 Series
1
A VOLTAGE DETECTOR
WITH OUTPUT DELAY
3
TC51-1
7/22/99
VOUT, stays valid until the input voltage falls below the
Minimum Operating Voltage, VIN(MIN), of 0.7V. Below this
minimum operating voltage, the output is undefined. During
power-up or anytime VIN has fallen below VIN(MIN), VOUT will
remain undefined until VIN rises above VIN(MIN), at which time
the output will become valid. VOUT will be in its active low
state while VIN(MIN) < VIN < V+DET. (V
+
DET = V
–
DET + VHYST). If
and when the input rises above V+DET, the output will assume
its inactive state after Delay Time (TDLY).
APPLICATIONS
Processor RESET Supervisor
Figure 2 shows the TC51 used as a processor reset
supervisor. Because the TC51 is available in threshold
settings of 1.6V to 6.0V in 100mV steps, the user can choose
the reset single threshold setting best suited to the system
power supply voltage at hand (please see
Application
Note #36). Also, the 1
A supply current is significantly lower
than its nearest competitor.
As shown in the timing diagram (Figure 1),VOUT is
guaranteed low for voltages between 0.7V and V
+
DET .The
TC51 activates its on-board delay timer once the power
supply voltage is within tolerance (i.e. greater than V
+
DET).
VOUT is released after delay time (TDLY).
Should the power supply voltage momentarily dip
(“brown-out” condition), the TC51 immediately drives and
holds the processor RESET input low. RESET is released
after the power supply voltage is again within tolerance, and
after the delay timer expires. RESET is driven and held low
when power fails (power-off or “blackout”), and is main-
tained low to a guaranteed supply voltage down to 0.7V.
Figure 1. Timing Chart
Figure 3. TC51 Operation During Power-Up, Brown-Out and Power Down.
Figure 2. Processor Reset Supervisor
DETAILED DESCRIPTION
Please refer to Figure 1. In normal steady-state opera-
tion, when VIN > V
–
DET, the output is high. If and when the
input falls below V
–
DET, the output pulls down (Logic 0) to VSS.
Generally, VOUT can pull down to within 0.5V of VSS at
rated output current and input voltage, (See the
Electrical
Characteristics section).
TC51
VOUT
GND
VDD
PROCESSOR
RESET
R1
47K
VIN
DETECT VOLTAGE VDET
MINIMUM OPERATING
VOLTAGE
VHYST
VDET
OUTPUT VOLTAGE
RELEASE
VOLTAGE
GROUND LEVEL
+
–
DELAY TIME (TDLY)
VOUT
NOMINAL
SUPPLY VOLTAGE
THRESHOLD
VOLTAGE
V
OH
TC51 OUTPUT
V
OL
POWER
(V—
DET, V
+
DFT)
0.7V
POWER-
UP
BROWN
OUT
STEADY
STATE
OPERATION
POWER DOWN
T
DLY
T
DLY
TIME
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC51N1802ECBTR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:1レA Voltage Detector with Output Delay |
| TC51N2202ECBTR | 功能描述:监控电路 2.2V 1uA w/Out Delay 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 |
| TC51N2702ECBTR | 功能描述:监控电路 2.7V 1uA w/Out Delay 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 |
| TC51N3002ECBTR | 功能描述:监控电路 3V 1uA w/Out Delay 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 |
| TC51V | 制造商:未知厂家 制造商全称:未知厂家 功能描述:500 mW LL-34 Hermetically Sealed Glass Zener Voltage Regulators |
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