The LMQ62440-Q1 device is capable of driving up to 4 A of load current from a supply voltage ranging from 3 V to 36 V. The LMQ62440-Q1 is a peak current mode controlled device. The following are additional features that provide both flexible and easy-to-use solutions for a wide range of applications:

• Integrated VIN bypass capacitors to achieve exceptional EMI performance, even in optimization-constrained layouts
• Factory programmed 2.1-MHz switching frequency
• Synchronization to an external clock
• Pin-selectable forced pulse width modulation mode (FPWM) for constant frequency operation
• Pin-selectable auto mode for improved light load efficiency
• Pin-selectable spread spectrum enable/disable
• Power-good flag
• Precision enable for programmable undervoltage lockout
• Automatic frequency foldback at light load and optional external bias to improve efficiency over the entire load range
• Package optimized for low noise and easy thermal management

Protection features include the following:

• Thermal shutdown
• Input undervoltage lockout
• Cycle-by-cycle current limiting
• Hiccup short-circuit protection

The pin configuration of the LMQ62440-Q1 is shown in Figure 1-1 and the application circuit is shown in Figure 1-2. Refer to the LMQ62440-Q1 Automotive 3-V to 36-V, 4-a, Low-Noise Synchronous Step-Down Converter Data Sheet for more detailed feature descriptions and design guide.

Figure 1-1 LMQ62440-Q1 Pin Configuration (14-Pin WQFN-HR Package Top View)

Figure 1-2 LMQ62440-Q1 Application Circuit