LM62435APPQRJRRQ1

The LM62435-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 3.5A over a wide input voltage range of 3.0V to 36V. It can withstand a voltage of 42V and support load dump events for up to 400ms. The LM62435-Q1 can perform soft recovery of the voltage drop, eliminating the need for output overshoot. The LM62435-Q1 is specifically designed to reduce EMI. The device features pseudo-random spread spectrum, adjustable SW node rise time, and low EMI. It comes in a VQFN-HR package with low switching node ringing and an optimized, easy-to-use pinout. The switching frequency can be synchronized from 200kHz to 2.2MHz to avoid 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 provides frequency foldback during light-load operation, achieving a no-load current consumption of only 7μA (typical) and high light-load efficiency. Seamless transitions between PWM and PFM modes, along with extremely low MOSFET on-resistance and an external bias input, ensure 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
• Documentation available to support functional safety system design, 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 regulation accuracy
• VOUT adjustable from 1V to 95% of VIN, with factory-selectable 5V and 3.3V fixed output voltage options
• 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: LM62440-Q1 (36V, 4A, fixed fSW), LM61460-Q1 (36V, 6A, adjustable fSW)