Analog Devices / Maxim Integrated MAX17612A/MAX17612B/MAX17612C Protection ICs
Analog Devices MAX17612A/MAX17612B/MAX17612C Adjustable Overvoltage and Overcurrent Protection ICs are in the Olympus series of ICs providing small and robust integrated system protection solutions. The devices are exceptional in protecting systems against positive and negative input voltage faults up to +60V and -65V. The Protection ICs offer an adjustable input overvoltage protection range of 5.5V to 60V and an adjustable input under-voltage protection range of 4.5V to 59V. The devices use external resistors to set the input overvoltage-lockout (OVLO) and under-voltage-lockout (UVLO) thresholds.
Additionally, the MAX17612A/MAX17612B/MAX17612C features an internal input under voltage threshold at 4.2V (typ.), and programmable current-limit protection up to 250mA. The programmable current-limit protection controls the inrush current at startup while charging high capacitances at the output. Programming the current-limit threshold is enabled by connecting a resistor from the SETI pin to GND. After reaching the programmed threshold, the device prevents further increases in current by modulating the FET resistance.
The Analog Devices MAX17612A/MAX17612B/MAX17612C exhibits three modes: Autoretry, Continous, or Latch-off. The MAX17612A and MAX17612C block current flowing in the reverse direction, while the MAX17612B allows current flow in the reverse direction. All three devices offer thermal shutdown protection against excessive power dissipation with an extended temperature range of -40°C to +125°C.
Features
- Robust protection reduces system downtime
- +4.5V to +60V wide input-supply range
- Hot plug-in tolerant without TVS up to 35V input supply
- Negative input tolerance to -65V
- Low RON 1.42Ω (typ.)
- Reverse current-blocking protection
- Thermal overload protection
- Extended -40°C to +125°C temperature range
- MAX17612A enables OV, UV, and reverse-voltage protection
- MAX17612B enables OV and UV protection
- MAX17612C enables reverse-voltage protection
- Flexible design options enable reuse and less requalification
- Adjustable OVLO and UVLO thresholds
- Programmable forward-current limit 10mA to 20mA with ±6% accuracy and 20mA to 250mA with ±5% accuracy over the full temperature range
- Programmable overcurrent fault response: Autoretry, Continuous, and Latch-Off Modes
- Smooth current transitions
- Saves board space and reduces external BOM count
- 10-pin, 3mm x 3mm, TDFN-EP package
- Integrated FETs
Applications
- Sensor systems
- Condition monitoring
- Factory sensors
- Process instrumentation
- Weighing and batching systems
- Industrial applications such as PLC, network-control modules, battery-operated modules
Circuit Diagram
Related Development Tools
Analog Devices / Maxim Integrated MAX17612AEVKIT Evaluation Kit
Demonstrates the MAX17612A, a 4.5V to 60V, current-limiter with OV, UV, and reverse protection.
Analog Devices / Maxim Integrated MAX17612BEVKIT Evaluation Kit
Evaluates the MAX17612B, current-limiter with OV, UV protection in a 10-pin TDFN-EP package.
Analog Devices / Maxim Integrated MAX17612CEVKIT Evaluation Kit
Platform for evaluating the MAX17612C, a current-limiter with reverse protection.