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| 型号： | MAX16067ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 42/48页 |
| 文件大小： | 0K |
| 描述： | IC SYSTEM MANAGER 6CH 32-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 电源监控器，序列发生器 |
| 电源电压： | 2.8 V ~ 14 V |
| 电流 - 电源： | 2.8mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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6-Channel, Flash-Configurable System Manager
with Nonvolatile Fault Registers
Maintaining Power During
a Fault Condition
Power to the MAX16067 must be maintained for a spe-
cific period of time to ensure a successful flash fault log
operation during a fault that removes power to the circuit.
Table 32 shows the amount of time required depends on
the settings in the fault control register (r6Dh[1:0]).
Maintain power for shutdown during fault conditions in
applications where the always-on power supply cannot
be relied upon by placing a diode and a large capacitor
between the voltage source, V IN , and V CC (Figure 15).
The capacitor value depends on V IN and the time delay
required, t FAULT_SAVE . Use the following formula to cal-
culate the capacitor size:
C = (t FAULT_SAVE x I CC(MAX) )/(V IN - V DIODE - V UVLO )
where the capacitance is in Farads and t FAULT_SAVE is in
seconds, I CC(MAX) is 14mA, V DIODE is the voltage drop
across the diode, and V UVLO is 2.7V. For example, with
a V IN of 14V, a diode drop of 0.7V, and a t FAULT_SAVE
of 153ms, the minimum required capacitance is 202 F F.
Driving High-Side MOSFET Switches
Up to three of the programmable outputs (EN_OUT1,
EN_OUT2, EN_OUT3) of the MAX16067 can be con-
figured as charge-pump outputs to drive the gates
of series-pass n-channel MOSFETS. When driving
MOSFETs, these outputs act as simple power switches
Table 32. Maximu m Write Time
to turn on the voltage supply rails. Approximate the slew
rate, SR, using the following formula:
SR = I CP /(C GATE + C EXT )
where I CP is the 6 F A (typ) charge-pump source cur-
rent, C GATE is the gate capacitance of the MOSFET,
and C EXT is the capacitance connected from the gate
to ground. If more than three series-pass MOSFETs
are required for an application, additional series-pass
p-channel MOSFETs can be connected to outputs con-
figured as active-low open drain (Figure 16). Connect
a pullup resistor from the gate to the source of the
MOSFET, and ensure the absolute maximum ratings of
the MAX16067 are not exceeded.
Configuring the Device
An evaluation kit and a graphical user interface (GUI) are
available to create a custom configuration for the device.
Refer to the MAX16067 Evaluation Kit for configuration.
Cascading Multiple MAX16067s
Multiple MAX16067s can be cascaded to increase the
number of rails controlled for sequencing and moni-
toring. There are many ways to cascade the devices
depending on the desired behavior. In general, there are
several techniques as follows:
U Configure a GPIO_ on each device to be EXTFAULT
(open-drain). Externally wire them together with a single
pullup resistor. Set register bits r72h[5] and r6Dh[2] to ‘1’
r6Dh[1:0] VALUE
00
01
10
11
V IN
C
DESCRIPTION
Save flags and ADC readings
Save flags
Save ADC readings
Do not save anything
V CC
MAXIMUM WRITE TIME (ms)
153
102
153
—
V IN
V OUT
R
MAX16067
MON_
EN_OUT_
GND
Figure 15. Power Circuit for Shutdown During Fault Conditions
MAX16067
Figure 16. Connection for a p-Channel Series-Pass MOSFET
42
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16067EVKIT+ | 功能描述:监控电路 6-Channel System Manager 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 |
| MAX16068ETI+ | 功能描述:监控电路 6Ch System Manager 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 |
| MAX16068ETI+T | 功能描述:监控电路 6Ch System Manager 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 |
| MAX16069FTC+ | 功能描述:监控电路 Quad/Hex/Octal Volt uP Supervisor 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 |
| MAX16069FTC+T | 功能描述:监控电路 Quad/Hex/Octal Volt uP Supervisor 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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