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MAX16126

Maxim Integrated Products
Part Number MAX16126
Manufacturer Maxim Integrated Products
Description Load-Dump/Reverse-Voltage Protector
Published Feb 21, 2012
Detailed Description EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX16126/MAX16127 Load-Dump/Rever...
Datasheet PDF File MAX16126 PDF File

MAX16126
MAX16126

Overview
EVALUATION KIT AVAILABLE Click here for production status of specific part numbers.
MAX16126/MAX16127 Load-Dump/Reverse-Voltage Protection Circuits General Description The MAX16126/MAX16127 load-dump/reverse-voltage protection circuits protect power supplies from damaging input voltage conditions, including overvoltage, reversevoltage, and high-voltage transient pulses.
Using a built-in charge pump, the devices control two external back-to-back n-channel MOSFETs that turn off and isolate downstream power supplies during damaging input conditions, such as an automotive load-dump pulse or a reverse-battery condition.
Operation is guaranteed down to 3V to ensure proper operation during automotive cold-crank conditions.
These devices feature a flag output (FLAG) that asserts during fault conditions.
For reverse-voltage protection, external back-to-back MOSFETs outperform the traditional reverse-battery diode, minimizing the voltage drop and power dissipation during normal operation.
The MAX16126/MAX16127 use external resistors to adjust the overvoltage and undervoltage comparator thresholds for maximum flexibility.
The MAX16127 provides limiter-mode fault management for overvoltage and thermal shutdown conditions; whereas the MAX16126 provides switch-mode fault management for overvoltage and thermal shutdown conditions.
In the limiter mode, the output voltage is limited and FLAG is asserted low during a fault.
In the switch mode, the external MOSFETs are switched off and FLAG is asserted low after a fault.
The switch mode is available in four options: latch mode, 1 autoretry mode, 3 autoretry mode, and always autoretry mode.
The MAX16126/MAX16127 are available in 12-pin TQFN packages.
These devices operate over the automotive temperature range (-40°C to +125°C).
Benefits and Features ●● Increases Protection of Sensitive Electronic Components in Harsh Environments • -36V to +90V Wide Input-Voltage Protection Range • Fast Gate Shutoff During Fault Conditions with C...


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