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Product Description:

The LMR66410MC5RXBRQ1 is an automotive 36V, 1A synchronous buck converter with a 1.5uA IQ and low EMI. Enhanced HotRod QFN package. The easy-to-use converter supports a wide input voltage range from 2.7V to 36V (after startup or operation) and supports transient voltages up to 42V.

The LMR66410-Q1 is designed to meet the low standby power requirements of normally open automotive applications. Automatic mode allows frequency rewinding during light load operation, achieving a typical no-load current consumption of 1.5µA (input voltage of 13.5V) and high light load efficiency. Seamless conversion between PWM and PFM modes and ultra-low MOSFET on-resistance ensure excellent efficiency across the entire load range. The control architecture (peak current mode) and feature set are optimized for ultra-small design sizes with ultra-small output capacitors. The device minimizes the input filter size by using dual random spread frequency (DRSS), low EMI enhanced HotRod QFN package, and optimized pin arrangement. The MODE/SYNC pin can be used to set or synchronize frequencies to avoid noise sensitive bands. There are NC pins between the key high voltage pins to reduce potential failures (excellent pin FMEA). The rich functionality of the LMR66410-Q1 is designed to simplify the implementation of various automotive terminal equipment.

Features

• Functional safety

- Documentation for functional safety system design is available

• Complies with AEC-Q100 standard for automotive applications:

- Temperature Class 1: -40 °C to +125°C, TA

• Optimized to meet low EMI requirements:

- Double random spread frequency reduces peak emission

- Enhanced HotRod™ QFN package minimizes switching node ringing

• Efficiency above 85% at 1mA

• Designed for automotive applications:

- Junction temperature range: -40 °C to +150°C

- NC pins between key pins improve reliability

- Excellent pin FMEA

- Support 42V vehicle load drop transients

- 3V input voltage can be provided for cold start of automobile

• Miniature design size and low component cost:

- Enhanced 2.6mm x 2.6mm HotRod QFN package with wettable sides

- Internal control loop compensation

Applications

• Advanced driver assistance System: Radar ECU

• Infotainment system and instrument group: audio console, eCall

• Body electronics and lighting

Pin configuration