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| 型号： | MAX6397TATA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC SW OVERVOLT PROT 8-TDFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 电压 - 工作： | 72V |
| 技术： | 混合技术 |
| 功率（瓦特）： | 1.45W |
| 电路数： | 1 |
| 应用： | 通用 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
Overvoltage Protection Switch/Limiter
Controllers Operate Up to 72V
Pin Description
MAX6397
1
PIN
MAX6398
1
NAME
IN
FUNCTION
Supply Voltage Input. Bypass with a minimum 10μF capacitor to GND.
Shutdown Input. Drive SHDN low to force GATE low, turning off the external n-channel
2
2
SHDN
MOSFET. REG remains active when in shutdown mode. SHDN is internally pulled down
to GND with a 1μA source. Connect to IN for normal operation.
Overvoltage Threshold Adjustment Input. Connect SET to an external resistor voltage-
3
3
SET
divider network to OUT (overvoltage limiter) or IN (overvoltage switch) to adjust the
desired overvoltage limit threshold. Use SET to monitor a system input or output voltage.
4
5
—
4
POK
GND
Open-Drain Output. POK remains low until REG exceeds 92.5% or 87.5% of REG
nominal output voltage. Connect to an external pullup resistor.
Ground
Gate-Drive Output. Connect GATE to the gate of an external n-channel MOSFET. GATE
6
5
GATE
is a charge pump with a 75μA pullup current to 10V (typ) above IN during normal
operation. GATE is quickly shorted to OUT during an overvoltage condition. GATE pulls
low when SHDN is low.
7
8
—
6
—
—
OUT
REG
EP
Output-Voltage-Sense Input. Connect to the source of the external n-channel MOSFET.
Regulator Output. Fixed 5.0V, 3.3V, 2.5V, or 1.8V output. REG sources up to 100mA.
Bypass with a minimum 4.7μF capacitor to GND.
Exposed Pad. Connect to ground plane.
Detailed Description
The MAX6397/MAX6398 are ultra-small, low-current,
high-voltage protection circuits for automotive applica-
tions that must survive load dump and high-voltage
transient conditions. These devices monitor the input/
output voltages and control an external n-channel
MOSFET to isolate the load or to regulate the output
voltage from overvoltage transient energy. The con-
troller allows system designers to size the external
MOSFET to their load current and board size.
The MAX6397/MAX6398 drive the MOSFET’s gate high
when the monitored input voltage is below the adjustable
overvoltage threshold. An internal charge-pump circuit
provides a 5V to 10V gate-to-source drive (see the
Typical Operating Characteristics) to ensure low input-to-
load voltage drops in normal operating modes. When the
input voltage rises above the user-adjusted overvoltage
threshold, GATE pulls to OUT, turning off
the MOSFET.
The MAX6397/MAX6398 are configurable to operate as
overvoltage protection switches or as closed-looped volt-
age limiters. In overvoltage protection switch mode, the
input voltage is monitored. When an overvoltage condi-
tion occurs at IN, GATE pulls low, disconnecting the load
from the power source, and then slowly enhances upon
removal of the overvoltage condition. In overvoltage
limit mode, the output voltage is monitored and the
MAX6397/MAX6398 regulate the source of the external
MOSFET at the adjusted overvoltage threshold, allowing
devices within the system to continue operating during an
overvoltage condition.
The MAX6397/MAX6398 undervoltage lockout (UVLO)
function disables the devices as long as the input
remains below the 5V (typ) UVLO turn-on threshold. The
MAX6397/MAX6398 have an active-low SHDN input to
turn off the external MOSFET, disconnecting the load and
reducing power consumption. After power is applied and
SHDN is driven above its logic-high voltage, there is a
100μs delay before GATE enhancement commences.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX6397TA-TTA-T | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| MAX6397VATA | 制造商:Maxim Integrated Products 功能描述:OVERVOLTAGE PROTECTION SWITCH/LIMIT - Rail/Tube |
| MAX6397VATA+ | 制造商:Maxim Integrated Products 功能描述:VOLT SUPERVISOR CNTRLR 1.215V 8TDFN EP - Rail/Tube |
| MAX6397VATA+T | 功能描述:监控电路 Over Volt Protection Switch/Limiter 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 |
| MAX6397VATA-T | 功能描述: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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