MAX16126
Load-Dump/Reverse-Voltage Protection Circuits
Protect Power-Supply Inputs from Automotive Voltage Transients, Including Load Dump
Maxim Confidential 
MyMaxim SubscriptionsProduct Details
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 active-low FLAG is asserted low during a fault. In the switch mode, the external MOSFETs are switched off and active-low 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).
Key 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 Complete Load Isolation
- Thermal-Shutdown Protection
- Active-Low FLAG Output Identifies Fault Condition
- AEC-Q100 Automotive Qualified
- Operates Down to +3V, Riding Out Cold-Crank Conditions
- -40°C to +125°C Operating Temperature Range
- Integration Reduces Solution Size
- Internal Charge-Pump Circuit Enhances External n-Channel MOSFETs
- Adjustable Undervoltage/Overvoltage Thresholds
- 3mm x 3mm, 12-Pin TQFN Package
- Reduced Power Dissipation Compared to Discrete Solutions
- Minimal Operating Voltage Drop for Reverse- Voltage Protection
- 350µA (max) Supply Current and 100µA (max) Shutdown Current at 30V Input
Applications/Uses
- Automotive
- Avionics
- Industrial
- Telecom/Server/Networking
| # Channels | 1 |
| VIN (V) (min) | 3 |
| VIN (V) (max) | 90 |
| Over Voltage Trip Level (V) | Adjustable |
| Under Voltage Lockout (V) | Adjustable |
| VGATE (V) | 9 |
| Over Volt. Flag | Open-Drain |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN/12 |
| Budgetary Price (See Notes) | $1.12 @1k |
Technical Docs
| Data Sheet | Load-Dump/Reverse-Voltage Protection Circuits | Jan 10, 2020 | |
| White Paper | How Automotive Displays Can Comply with Functional Safety Requirements |
Click any title below to view the detail page where available.
Description
The MAX16126/MAX16127 evaluation kits (EV kits) demonstrate high overvoltage protection of the MAX16126/MAX16127 devices for automotive applications that must survive load-dump and high-voltage transient conditions. The fully assembled and tested surface-mount EV kit board provides two circuits: One full-featured solution and one minimum parts-count circuit. The full-featured solution exercises all the features of the devices and allows -60V to +90V protection beyond the 3V to 30V operating range. The minimum parts-count solution provides a cost-effective option using a small 3A, dual MOSFET and reduced 0 to +60V voltage range.
View DetailsFeatures
- Dual Circuits
- Full-Featured Solution (-60V to +90V)
- Minimum Parts-Count Solution (0 to +60V)
- Robust Reverse-Battery Protection (Circuit 1)
- Positive Input Supply Voltage Protection Range Extended Beyond +90V (Circuit 1)
- Adjustable Undervoltage and Overvoltage Thresholds
- Adjustable Undervoltage Set for 8V
- Adjustable Overvoltage Threshold Set for 32.1V
- Enable Input/Flag Output
- Proven PCB Layout
- Fully Assembled and Tested
Description
The MAX16126/MAX16127 evaluation kits (EV kits) demonstrate high overvoltage protection of the MAX16126/MAX16127 devices for automotive applications that must survive load-dump and high-voltage transient conditions. The fully assembled and tested surface-mount EV kit board provides two circuits: One full-featured solution and one minimum parts-count circuit. The full-featured solution exercises all the features of the devices and allows -60V to +90V protection beyond the 3V to 30V operating range. The minimum parts-count solution provides a cost-effective option using a small 3A, dual MOSFET and reduced 0 to +60V voltage range.
View DetailsFeatures
- Dual Circuits
- Full-Featured Solution (-60V to +90V)
- Minimum Parts-Count Solution (0 to +60V)
- Robust Reverse-Battery Protection (Circuit 1)
- Positive Input Supply Voltage Protection Range Extended Beyond +90V (Circuit 1)
- Adjustable Undervoltage and Overvoltage Thresholds
- Adjustable Undervoltage Set for 8V
- Adjustable Overvoltage Threshold Set for 32.1V
- Enable Input/Flag Output
- Proven PCB Layout
- Fully Assembled and Tested
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
| # Channels | 1 |
| VIN (V) (min) | 3 |
| VIN (V) (max) | 90 |
| Over Voltage Trip Level (V) | Adjustable |
| Under Voltage Lockout (V) | Adjustable |
| VGATE (V) | 9 |
| Over Volt. Flag | Open-Drain |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN/12 |
| Budgetary Price (See Notes) | $1.12 @1k |
Key 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 Complete Load Isolation
- Thermal-Shutdown Protection
- Active-Low FLAG Output Identifies Fault Condition
- AEC-Q100 Automotive Qualified
- Operates Down to +3V, Riding Out Cold-Crank Conditions
- -40°C to +125°C Operating Temperature Range
- Integration Reduces Solution Size
- Internal Charge-Pump Circuit Enhances External n-Channel MOSFETs
- Adjustable Undervoltage/Overvoltage Thresholds
- 3mm x 3mm, 12-Pin TQFN Package
- Reduced Power Dissipation Compared to Discrete Solutions
- Minimal Operating Voltage Drop for Reverse- Voltage Protection
- 350µA (max) Supply Current and 100µA (max) Shutdown Current at 30V Input
Applications/Uses
- Automotive
- Avionics
- Industrial
- Telecom/Server/Networking
Description
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 active-low FLAG is asserted low during a fault. In the switch mode, the external MOSFETs are switched off and active-low 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).
Technical Docs
| Data Sheet | Load-Dump/Reverse-Voltage Protection Circuits | Jan 10, 2020 | |
| White Paper | How Automotive Displays Can Comply with Functional Safety Requirements |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Request a Quote