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参数资料
| 型号： | MAX16051ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/21页 |
| 文件大小： | 0K |
| 描述： | IC POWER MONITR/SEQUENCER 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 应用： | 电源监控器，序列发生器 |
| 电源电压： | 2.7 V ~ 13.2 V |
| 电流 - 电源： | 700µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 管件 |
Voltage Monitors/Sequencer Circuits with
Reverse-Sequencing Capability
R1 = A 1TH
Enable Hold Input ( EN_HOLD )
When EN_HOLD is low, a high-to-low transition on
SHDN or on EN is ignored. EN_HOLD must be high for
SHDN or EN to disable the device. This feature is used
when multiple MAX16050/MAX16051s are daisy-
chained (see Figure 7). Connect EN_HOLD to ABP if
not used.
Delay Time Input (DELAY)
Connect a capacitor (C DELAY ) between DELAY and
GND to adjust the sequencing delay period (t DELAY )
that occurs between sequenced channels. Use the fol-
lowing formula to estimate the delay:
t DELAY = 10μs + (500k ? x C DELAY )
equation to estimate the value of the resistors based on
the amount of acceptable error:
e × V
I SET
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 1TH is the power-
good threshold for the power supply being monitored,
and I SET is the worst-case SET_ input leakage current
(see the Electrical Characteristics table). Calculate R2
as follows:
where t DELAY is in seconds and C DELAY is in Farads.
Leave DELAY unconnected for the default 10μs (typ)
delay.
R2 =
V TH × R 1
V 1TH ? V TH
Reset Timeout Input (TIMEOUT)
Connect a capacitor (C TIMEOUT ) from TIMEOUT to
GND to set the reset timeout period. After all SET_
inputs exceed their thresholds (V TH ), RESET remains
low for the programmed timeout period, t RP , before
deasserting (see Figure 1). Use the following formula to
estimate the reset timeout period:
t RP = 10μs + (500k ? x C TIMEOUT )
where t RP is in seconds and C TIMEOUT is in Farads.
Leave TIMEOUT unconnected for the default 10μs (typ)
timeout delay or connect TIMEOUT to ABP to enable a
fixed 128ms (typ) timeout.
Applications Information
Resistor Value Selection
The MAX16050/MAX16051 feature four and five SET_
inputs, respectively, and the threshold voltage (V TH ) at
Pullup Resistor Values
The exact value of the pullup resistors for the open-
drain outputs is not critical, but some consideration
should be made to ensure the proper logic levels when
the device is sinking current. For example, if V CC =
3.3V and the pullup voltage is 5V, keep the sink current
less than 3.2mA as shown in the Electrical
Characteristics table. As a result, the pullup resistor
should be greater than 1.6k ? . For a 13.2V pullup, the
resistor should be larger than 4.1k ? .
Extra care must be taken when using CP_OUT as the
pullup voltage. If multiple pullup resistors are connect-
ed to CP_OUT and one or more of the connected OUT_
outputs are asserted, the current drawn can drop the
CP_OUT voltage enough to prevent an enabled
MOSFET from turning on completely.
each SET_ input is 0.5V (typ). To monitor a voltage
V 1TH , connect a resistive divider network to the circuit
as shown in Figure 6, and use the following equation to
calculate the monitored threshold voltage:
R1
V 1TH
V BUS
V CC
V 1TH = V TH × ? 1 +
?
?
?
R1 ?
R2 ?
R2
SET_
RESET
Balance accuracy and power dissipation when choos-
ing the external resistors. The input to the voltage moni-
tor is a high-impedance input with a small 100nA
leakage current. This leakage current contributes to the
overall error of the threshold voltage, and this error is
proportional to the value of the resistors used to set the
threshold. Small-valued resistors reduce the error but
increase the power consumption. Use the following
MAX16050
MAX16051
GND
Figure 6. Setting the SET_ Input
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16051ETI+ | 功能描述:监控电路 Volt Mtr/Sequencer w/Reverse-Seq 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 |
| MAX16051ETI+T | 功能描述:监控电路 Volt Mtr/Sequencer w/Reverse-Seq 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 |
| MAX16052AUT+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR SEQUENCER/MONITOR 6PIN SOT-23 - Rail/Tube |
| MAX16052AUT+T | 功能描述:监控电路 Adj Sequencing / Supervisory 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 |
| MAX16053AUT+ | 制造商:Maxim from Components Direct 功能描述:MAXIM MAX16053AUT+, SUPERVISORS - Tape and Reel 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR SEQUENCER/MONITOR 6PIN SOT-23 - Rail/Tube 制造商:Maxim 功能描述:Maxim MAX16053AUT+, Supervisors |
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