DATASHEET
RAA212422
Dual channel 40V 1.1A and 5.5V 1.5A synchronous buck regulators
FN9326 Rev.2.00 Feb 27, 2020
The ...
DATASHEET
RAA212422
Dual channel 40V 1.1A and 5.5V 1.5A synchronous buck
regulators
FN9326 Rev.2.00 Feb 27, 2020
The RAA212422 is a dual output
regulator combining a 1.1A synchronous buck
regulator with an input range of 3V to 40V with a 1.5A synchronous buck
regulator with an input voltage range of 2.7V to 5.5V. Because both high-side and low-side MOSFETs are integrated for both
regulators, the RAA212422 provides an easy-to-use, high-efficiency, and low BOM-count solution for a variety of applications.
Both
regulators feature internal and external compensation, thermal shutdown, and power-good functions. The wide VIN buck
regulator features a PFM mode for improved efficiency at light load. This feature can be disabled if forced PWM mode is desired. It switches at a default frequency of 500kHz; however, it can also be programmed using an external resistor from 300kHz to 2MHz. Other features include programmable soft-start and hiccup overcurrent protection.
The low VIN buck
regulator operates at 1MHz switching frequency, which provides fast load transient response allowing the use of small inductors. Because the high-side MOSFET of the low VIN buck
regulator is a PMOS, a boot capacitor is not needed, reducing the external component count. They operate at 100% duty cycle and in PWM mode only, reducing noise susceptibility and RF interference.
The RAA212422 is available in a small RoHS compliant 3mmx6mm TDFN plastic package with a full-range industrial temperature of -40°C to...