SNVSBY6 October 2021 LM61430-Q1
The LM61430-Q1 is a wide input, synchronous peak-current mode buck regulator designed for a wide variety of industrial applications. The regulator can operate over a wide range of switching frequencies including sub-AM band at 400 kHz and above the AM band at 2.1 MHz. This device operates over a wide range of conversion ratios. If minimum on time or minimum off time does not support the desired conversion ratio, frequency is reduced automatically, allowing output voltage regulation to be maintained during input voltage transients with a high operating-frequency setting.
The LM61430-Q1 has been designed for low EMI and is optimized for both above and below AM band operation:
These features together can eliminate shielding and other expensive EMI mitigation measures.
This device is designed to minimize end-product cost and size while operating in demanding high-performance industrial environments. The LM61430-Q1 can be set to operate in the range of 200 kHz through 2.2 MHz using its RT pin. Operation at 2.1 MHz allows for the use of small passive components. The current limit function allows the use of inductors that are optimized for 3-A regulators. In addition, this device has low unloaded current consumption, desirable for off-battery, always on applications. The low shutdown current and high maximum operating voltage also allows for the elimination of an external load switch and input transient protection. To further reduce system cost, an advanced PGOOD output is provided, which can often eliminate the use of an external reset or supervisory device.
The LM61430-Q1 devices are AEC-Q100 qualified and have electrical characteristics specified up to a maximum junction temperature of 150°C.