MX74502D23

MX74502D23 is a controller designed to work with back-to-back external N-channel MOSFETs to implement low-loss reverse polarity protection and load disconnect solutions. The device can also be configured to drive a high-side MOSFET as a high-side switch with overvoltage protection. Its wide supply input range of 4V to 85V allows control of various common DC bus voltages, including 12V, 24V, 48V, and 60V input systems. The device can withstand negative supply voltages as low as -90V to protect the load. MX74502D23 does not feature active reverse current blocking. The controller provides a charge pump gate driver for external N-channel MOSFETs. When the enable pin is low, the controller shuts down and draws only approximately 1μA, enabling low system current when the system enters sleep mode. MX74502D23 offers programmable overvoltage and undervoltage protection, disconnecting the load from the input source when these fault events occur. The device is available in an 8-pin DFN2×3 package.

Applications

• Reverse polarity protection
• Industrial motor drives
• High-side switching
• Battery high-side MOSFET drivers

Key features

• 4V to 85V input voltage range
• -90V input reverse voltage rating
• Integrated charge pump for driving external back-to-back N-channel MOSFETs, external high-side switch MOSFETs, external reverse polarity protection MOSFETs
• 2.3A peak gate sink current capability
• 12mA peak gate drive source current capability
• Enable control
• 100μA typical quiescent operating current (EN = High)
• 1μA shutdown current @12V input (EN = Low)
• Adjustable overvoltage and undervoltage protection
• Available in 8-pin DFN2×3 package