High-Side Switch Controller with Current Limiting

Very Robust High-Side Controller Great for Motor Holding Brake Applications



The MAX14922 is a high-side, n-channel FET controller for implementing industrial high-side switches for switching ground-connected loads. The MAX14922 device controls an external nMOS power transistor, allowing low RON high-side switch applications from a +9V to +70V supply range.

Fast inductive load turn-off can be achieved with use of a high-voltage TVS diode enabling up to -70V (max) voltage clamping. Ground-connected TVS diodes allow clamping of exceptionally high inductive energies.

Load current is limited to a user-defined value through a sense resistor. External FET overload protection is achieved using an auto-retry timing feature, as defined by a user-selected capacitor (CBLANK at tBLANK input) or optionally using an external timing control.

The MAX14922 features an on-chip comparator enabling monitoring of the high-side switch output or the supply input voltage with a user-selected threshold. An integrated charge pump enables high speed switching rates when using low RON FETs in the 20kHz to 50kHz range.

The MAX14922 is available in a 3mm x 3mm, 16-TQFN package. The MAX14922 device is specified over the -40°C to +125°C operating temperature range.


  • +9V to +70V Operating Supply Range
  • 5V / 50mA Integrated Linear Regulator
  • -40°C to +125°C Ambient Temperature Operating Range
  • 16-TQFN Package, 3mm x 3mm, 0.5mm Pin Pitch
  • Robust Design Features
    • Ultra High-Speed Inductive Load Turn-Off by Clamping to -70V
    • Supply Independent Inductive Clamping
    • Support of Low RON FETs Having Qg (Total) = 50nC
    • External FET Turn-On Propagation Delay < 20μs
    • Active Current Limit Control During Overcurrent
  • Fault Monitoring Diagnostic Features
    • Overcurrent Detect Output
    • High Supply-Voltage Indication
    • Flexible Supply or Load Voltage Monitor
    • Undervoltage Lockout
    • Thermal Warning and Shutdown Protection
    • Device Ready Indication


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请查看具体的参数规格 Digital I/O (18)

Part NumberDigital Input/OutputµC Interface TypeChannelsVSUPPLY
MAX14922 NEW!Digital OutputCMOS19701.8

Pricing Notes:

MAX14922EVKIT: Evaluation Kit for the MAX14922
申请可靠性报告: MAX14922 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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High-Side Switch Controller with Current Limiting

  • +9V to +70V Operating Supply Range
  • 5V / 50mA Integrated Linear Regulator
  • -40°C to +125°C Ambient Temperature Operating Range

Industrial Octal High-Side Switch

  • Robust Solutions
  • Reduces Power and Heat Dissipation
  • Flexible