Monolithic Power Systems (MPS) MPQ5872 Smart High-Side Load Switch
Monolithic Power Systems (MPS) MPQ5872 Smart High-Side Load Switch is designed for nominal 2A loads. The device features an input voltage (VIN) as low as 3.5V and can withstand load dumps up to 42V. With a small on-resistance (RDS(ON)) in a tiny QFN-8 (2mmx2.5mm) package, MPQ5872 provides a highly efficient, compact solution. The device supports both internal and configurable, high-accuracy external current limits. This feature helps clamp the inrush current under short-circuit conditions, which improves overall system reliability. An adjustable start-up slew rate also helps to reduce inrush current during start-up.
The FT/CS pin provides high-accuracy current sensing, which achieves accurate real-time diagnostics without further calibration. The FT/CS pin voltage represents one / KCS of the load current, where KCS is a constant value across the temperature and supply voltage. In addition, the FT/CS pin can report a fault by pulling up its voltage. The MPQ5872 features full diagnostics during both on and off states. By pulling the DIAG_EN pin up or down, off-state open-load and short-to-battery detection can be enabled or disabled. If off-state diagnostics are not required in the system, the function can be disabled to reduce the standby current by connecting DIAG_EN to the GND pin. The Monolithic Power Systems (MPS) MPQ5872 is available in a QFN-8 (2mmx2.5mm) package with wettable flanks and in AEC-Q100 Grade 1 or AECQ100-012 Test Grade A.
Features
- Built to handle harsh automotive transients
- Load dump up to 42V
- Cold crank down to 3.5V
- Cooler thermals - integrated 60mΩ MOSFET
- 0.5µA extremely low standby current extends vehicle battery life
- Available in a QFN-8 (2mmx2.5mm) package reduces board size
- Vast flexibility
- Configurable external current limit
- Adjustable start-up slew rate
- 3.3V and 5V logic compatible
- Full diagnostic and protection features
- Supports functional safety applications
- High-accuracy current sense of ±4% at 1A and ±6% at 300mA
- On- and off-state open-load and short-to-battery detection
- Thermal shutdown protection
- Available in AEC-Q100 Grade 1
- Available in AEC-Q100-012 Test Grade A
- Available in a wettable flank package
Applications
- Smart switches for automotive infotainment systems
- Power switches for Advanced Driver Assistance Systems (ADAS)
- High-side power switches for sub-modules
- General resistive, inductive, and capacitive loads
Typical Application
Related Development Tool
Monolithic Power Systems (MPS) EVQ5872-RP-00A Evaluation Board
Designed to demonstrate the capabilities of the MPQ5872, a smart high-side power switch.