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4.5V to 60V, 250mA Current-Limiter with OV, UV, and Reverse Protection

Highly Integrated System Protection Solution Enables Small and Robust Design

Product Details

Key Features

Applications/Uses

Parametric specs for Overvoltage/Overcurrent Protectors with Internal MOSFETs
VIN (V) (min) 4.5
VIN (V) (max) 60
Current Limit (A) (min) 0.01
Current Limit (A) (max) 0.25
# Channels 1
Internal Pwr. MOSFETs NMOS+NMOS
RON (mΩ) (typ) 1420
Current Limit Accuracy (%) 5
Fault Response Latchoff
Reverse Current Protect. Yes
Fault Indicator Yes
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
1.1
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Simplified Block Diagram

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Parameters

Parametric specs for Overvoltage/Overcurrent Protectors with Internal MOSFETs
VIN (V) (min) 4.5
VIN (V) (max) 60
Current Limit (A) (min) 0.01
Current Limit (A) (max) 0.25
# Channels 1
Internal Pwr. MOSFETs NMOS+NMOS
RON (mΩ) (typ) 1420
Current Limit Accuracy (%) 5
Fault Response Latchoff
Reverse Current Protect. Yes
Fault Indicator Yes
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
1.1

Key Features

  • Robust Protection Reduces System Downtime
    • Wide Input-Supply Range: +4.5V to +60V
    • 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 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/Uses

  • Condition Monitoring
  • Factory Sensors
  • Industrial Applications such as PLC, Network-Control Modules, Battery-Operated Modules
  • Process Instrumentation
  • Sensor Systems
  • Weighing and Batching Systems

Description

The Olympus series of ICs is the industry’s smallest and robust integrated system protection solutions. The MAX17612A/MAX17612B/MAX17612C adjustable overvoltage and overcurrent protection devices are ideal to protect systems against positive and negative input voltage faults up to +60V and -65V, and feature low 1.42Ω (typ) RON FETs.

The adjustable input overvoltage protection range is 5.5V to 60V and the adjustable input undervoltage protection range is 4.5V to 59V. The input overvoltage-lockout (OVLO) and undervoltage-lockout (UVLO) thresholds are set using external resistors. Additionally, the devices offer an internal input undervoltage threshold at 4.2V (typ).

The devices feature programmable current-limit protection up to 250mA; hence, controlling the inrush current at startup while charging high capacitances at the output. Current-limit threshold is programmed by connecting a resistor from the SETI pin to GND. When the device current reaches the programmed threshold, the device prevents further increases in current by modulating the FET resistance. The devices can be programmed to behave in three different ways under current-limit condition: Autoretry, Continous, or Latch-off modes. The voltage appearing on the SETI pin is proportional to the instantaneous current flowing through the device and is read by an ADC.

MAX17612A and MAX17612C block current flowing in the reverse direction (i.e., from OUT to IN) whereas MAX17612B allows current flow in the reverse direction. The devices feature thermal shutdown protection against excessive power dissipation.

The devices are available in a small, 10-pin (3mm x 3mm) TDFN-EP package. The devices operate over the -40°C to +125°C extended temperature range.

Simplified Block Diagram

MAX17612A, MAX17612B, MAX17612C: Typical Operating Circuit MAX17612A, MAX17612B, MAX17612C: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .