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参数资料
| 型号： | MAX16050 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Voltage Monitors/Sequencer Circuits with Reverse-Sequencing Capability |
| 中文描述： | 电压监测器/排序电路，可反向排序 |
| 文件页数： | 16/22页 |
| 文件大小： | 322K |
| 代理商： | MAX16050 |
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
Ω
x C
DELAY
)
where t
DELAY
is in seconds and C
DELAY
is in Farads.
Leave DELAY unconnected for the default 10μs (typ)
delay.
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
Ω
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
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:
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
equation to estimate the value of the resistors based on
the amount of acceptable error:
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:
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
Ω
. For a 13.2V pullup, the
resistor should be larger than 4.1k
Ω
.
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.
R
V
R
V
V
2
TH
1
TH
1TH
=
×
R
e
V
I
1
A
1TH
SET
=
×
V
V
1
R1
R2
1TH
TH
=
×
+
MAX16050
MAX16051
SET_
V
CC
GND
V
BUS
RESET
V
1TH
R1
R2
Figure 6. Setting the SET_ Input
M
Voltage Monitors/Sequencer Circuits with
Reverse-Sequencing Capability
16
______________________________________________________________________________________
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| MAX16050ETI+ | 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 |
| MAX16050ETI+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 |
| MAX16050EVKIT+ | 功能描述:电源管理IC开发工具 MAX16050 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| 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 |
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