The LM6x4xx-Q1 is a wide-input and output-voltage range, low-quiescent current, high-performance regulator that operates over a wide range of frequencies and conversion ratios. If the minimum on-time or minimum off-time does not support the desired conversion ratio, the frequency is reduced. This action automatically allows regulation to be maintained during load dump and with very low dropout during cranking.

This device is designed to minimize end-product cost and size while operating in demanding automotive and high-performance industrial environments. The LM6x4xx-Q1 can be set to operate at fixed 400 kHz, fixed 2.2 MHz, or is adjustable from 200 kHz to 2.2 MHz using the RT pin. Internal compensation and an accurate current limit scheme minimizes BOM cost and component count. In addition, the RESET output feature with built-in delayed release and low-current light-load mode lets the user eliminate a backup LDO and reset chip in many applications.

The LM6x4xx-Q1 has been designed for low EMI. The device includes the following:

• Adjustable switch node rising slew rate
• Pin-configurable spread spectrum
• Low input inductance package
• Operation over a frequency range above and below AM radio band

Together, these features can eliminate shielding and other expensive EMI mitigation measures.

To use the device in reliability-conscious environments, the LM6x4xx-Q1 has a package with enlarged corner terminals for improved BLR and wettable flanks, allowing optical inspection.