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MOSFET Drivers and Controllers 
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MAX14922
High-Side Switch Controller with Current Limiting
Very Robust High-Side Controller Great for Motor Holding Brake Applications
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Key Features
Applications/Uses
Parametric specs for Digital I/O
| Digital Input/Output | Digital Output |
| Interface Type | CMOS |
| # Channels | 1 |
| VSUPPLY (V) (min) | 9 |
| VSUPPLY (V) (max) | 70 |
| ISUPPLY (µA) (typ) | 1.8 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | 1.99 |
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Simplified Block Diagram
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Parameters
Parametric specs for Digital I/O
| Digital Input/Output | Digital Output |
| Interface Type | CMOS |
| # Channels | 1 |
| VSUPPLY (V) (min) | 9 |
| VSUPPLY (V) (max) | 70 |
| ISUPPLY (µA) (typ) | 1.8 |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TQFN-CU/16 |
| Budgetary Price (See Notes) | 1.99 |
Key Features
- +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
Applications/Uses
- Industrial Digital Outputs
- High-Side Switches
- Motor Holding Brakes
- Relay and Solenoid Drivers
Description
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.
Simplified Block Diagram
Technical Docs
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 .
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