LM61480QRPHRQ1

The LM6x4xx-Q1 buck regulator family is an automotive-grade regulator series offering fixed or adjustable output voltage (configurable from 1V to 95% of the expected input voltage). These regulators operate over a wide input voltage range (3V to 36V) with transient tolerance up to 42V. This family is designed for low EMI. The device features pin-selectable spread spectrum and adjustable SW node rise time. Dual Random Spread Spectrum (DRSS) frequency dithering is set to ±4% (typical), significantly reducing peak emissions through a combination of triangular and pseudo-random modulation, with advanced techniques to minimize output voltage ripple caused by spread spectrum modulation. The open-drain RESET output with filtering and deglitched release provides accurate system status indication. In automatic mode, the device automatically transitions between fixed-frequency PWM and PFM operating modes, achieving a no-load quiescent current of only 5μA (typical). Electrical characteristics are rated for a junction temperature range of –40°C to +150°C.

Applications

• Automotive infotainment systems
• Instrument clusters
• ADAS

Key features

• AEC-Q100 qualified for automotive applications: Temperature Grade 1: -40°C to +125°C, TA
• Functional Safety capable
• Documentation available to aid functional safety system design
• Input voltage range: 3V to 36V
• RESET output with filter and delayed release
• Low EMI:
• EVM compliant with CISPR 25 Class 5
• Pin-configurable spread spectrum
• Adjustable SW node rise time
• Above and below AM band operation: pin-configurable fixed 400kHz and 2.2MHz, or adjustable between 200kHz to 2.2MHz
• Low EMI symmetrical pin layout
• Pin-configurable light load mode for constant frequency or PFM
• High efficiency solution:
• 95% efficiency at 8A load
• 5μA input current at no load in Auto mode
• <1μA shutdown current (typical)
• High power density:
• Integrated compensation, soft-start, current limit, thermal shutdown, and UVLO
• 4.5mm×3.5mm wettable flank QFN package
• ΘJA = 21.6°C/W, measured on LM61495RPHEVM