LM62440BPPQRJRRQ1

The LM62440-Q1 is a high-performance automotive-specific DC/DC synchronous step-down converter. This device features integrated high-side and low-side MOSFETs, capable of delivering an output current of up to 4A over a wide input voltage range from 3.0V to 36V. It can withstand a voltage of 42V and support load dumps of up to 400ms duration. The LM62440-Q1 can perform soft recovery of the voltage drop, eliminating the need for output overshoot. The LM62440-Q1 is specifically designed to reduce EMI. This device features pseudo-random spread spectrum, adjustable SW node rise time, and low EMI, and comes in a VQFN-HR package with low switching node ringing and an easy-to-use, optimized pinout. The switching frequency can be synchronized from 200kHz to 2.2MHz, avoiding noise-sensitive frequency bands. Additionally, the frequency can be selected to improve efficiency at low operating frequencies or reduce the solution size at high operating frequencies. The automatic mode enables frequency foldback during light-load operation, achieving a no-load current consumption of only 7µA (typical) and high light-load efficiency. Seamless conversion between PWM and PFM modes, along with extremely low MOSFET on-resistance and an external bias input, ensures excellent efficiency across the entire load range.

Applications

• Automotive infotainment systems and instrument clusters: head units, media hubs, USB chargers, displays
• Automotive ADAS and body electronics

Key features

• AEC-Q100 qualified for automotive applications – Temperature Grade 1: -40°C to +150°C, TJ
• Functional safety capable
• Optimized for ultra-low EMI requirements
• HotRod package and parallel input path minimize switching node ringing
• Spread spectrum reduces peak emissions
• Adjustable SW node rise time
• Pin-selectable FPWM mode for constant frequency at light load
• Designed for automotive applications
• Supports 42V automotive load dump
• ±1% total output voltage regulation accuracy
• VOUT adjustable from 1V to 95% of VIN, with factory-selectable 5V and 3.3V fixed output voltages
• High-efficiency power conversion across all load conditions
• 7µA no-load quiescent current at 13.5VIN, 3.3VOUT
• 83% PFM efficiency at 1mA, 13.5VIN, 5VOUT
• External bias option for improved efficiency
• Scalable power supply compatible
• Pin-compatible with LM61440-Q1 (36V, 4A, adjustable fSW), LM61460-Q1 (36V, 6A, adjustable fSW), and LMQ62440-Q1 (36V, 4A, internal capacitor)