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参数资料
| 型号： | MAX16027TP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/15页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISORY CIRC TRPL 20TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 类型： | 序列发生器 |
| 监视电压数目： | 3 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 低有效 |
| 复位超时： | 140 ms/可调最小值 |
| 电压 - 阀值： | 9 种可选阀值组合 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 包装： | 管件 |
Dual-/Triple-/Quad-Voltage, Capacitor-
Adjustable, Sequencing/Supervisory Circuits
Applications Information
The following equation is provided to help estimate the
value of the resistors based on the amount of accept-
R 1 = A INTH
Tolerance
The MAX16025 –MAX16030 feature a pin-selectable
threshold tolerance. Connect TOL to GND to select the
thresholds 5% below the nominal value. Connect TOL to
able error:
e × V
I L
V CC to select the threshold tolerance 10% below the
nominal voltage. Do not leave TOL unconnected.
Adjustable Input
These devices offer several monitoring options with
both fixed and/or adjustable reset thresholds (see
Table 2). For the adjustable threshold inputs, the
where e A is the fraction of the maximum acceptable
absolute resistive divider error attributable to the input
leakage current (use 0.01 for ±1%), V INTH is the volt-
age at which the output (OUT_) should assert, and I L is
the worst-case IN_ leakage current (see the Electrical
Characteristics). Calculate R2 as follows:
threshold voltage (V TH ) at each adjustable IN_ input is
typically 0.5V (TOL = GND) or 0.472V (TOL = V CC ). To
monitor a voltage V INTH , connect a resistive divider net-
work to the circuit as shown in Figure 3 and use the fol-
lowing equation to calculate the threshold voltage:
R 2 =
V TH × R 1
V INTH ? V TH
Unused Inputs
V INTH = V TH × ? 1 +
?
?
?
R 1 ?
R 2 ?
Connect any unused IN_ and EN_ inputs to V CC .
OUT_ Output
An OUT_ goes low when its respective IN_ input voltage
Choosing the proper external resistors is a balance
between accuracy and power use. The input to the volt-
age monitor is a high-impedance input with a small
100nA leakage current. This leakage current con-
tributes to the overall error of the threshold voltage
where the output is asserted. This induced error is pro-
portional to the value of the resistors used to set the
threshold. With lower value resistors, this error is
reduced, but the amount of power consumed in the
resistors increases.
V INTH
drops below its specified threshold or when its EN_ goes
low (see Table 1). OUT_ goes high when EN_ is high and
V IN_ is above its threshold after a time delay. The
MAX16025/MAX16027/MAX16029 feature open-drain,
outputs while the MAX16026/MAX16028/MAX16030
have push-pull outputs. Open-drain outputs require an
external pullup resistor to any voltage from 0 to 28V.
RESET Output
RESET asserts low when any of the monitored voltages
(IN_) falls below its respective threshold, any EN_ goes
low, or MR is asserted. RESET remains asserted for the
reset timeout period after all of the monitored voltages
exceed their respective threshold, all EN_ are high, all
OUT_ are high, and MR is deasserted. The MAX16025/
R1
R2
IN_
MAX16025–
MAX16030
MAX16027/MAX16029 have an open-drain, active-low
reset output, while the MAX16026/MAX16028/
MAX16030 have a push-pull, active-low reset output.
Open-drain RESET requires an external pullup resistor to
any voltage from 0 to 28V.
Adjustable Reset Timeout Period
V TH
(CRESET)
All of these parts offer an internally fixed reset timeout
R1 = R2 x
V
( V INTH -1 )
(140ms min) by connecting CRESET to V CC . The reset
timeout can also be adjusted by connecting a capaci-
tor from CRESET to GND. When the voltage at CRESET
reaches 0.5V, RESET goes high. When RESET goes
high, CRESET is immediately held low.
Figure 3. Setting the Adjustable Input
10
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16027TP+ | 功能描述:监控电路 Dual/Triple/Quad Sequencng/Suprvisory 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 |
| MAX16027TP+T | 功能描述:监控电路 Dual/Triple/Quad Sequencng/Suprvisory 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 |
| MAX16028TP+ | 功能描述:监控电路 Dual/Triple/Quad Sequencng/Suprvisory 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 |
| MAX16028TP+T | 功能描述:监控电路 Dual/Triple/Quad Sequencng/Suprvisory 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 |
| MAX16029EVKIT | 功能描述:监控电路 Dual/Triple/Quad-Volt. Capacitor-Adjustable Sequencing/监控电路 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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